Servo Cycler

SER 0 CYCLER Servo Cycler 5 simple low-cost easily built test accessory serious modeler automatically cycles servos throughout range motion very controlled manner precision servo drive causes servo installation anomalies stand right out get attention example its uncommon servo pots wear near servo neutral cause some surface jitter sometimes servo-to-surface linkage may bind somewhere displacement range Cycler can highlight such problems ease Servo Cycler fully adjustable can set allow manual dialing servo position just like ordinary servo driver Cycler can set automatically move servo amount zero past normal full-range adjustable speed Cycle Speed ranges about 20 seconds per cycle about 20 times faster Cycler connected between receiver receiver battery servo out model can signal servo jump back forth bang-bang manner see servo settles throw limit can sweep servo over same worn dirty U Bob Kopski rangefar smoothly repeatably can ever move transmitter control hand Its mode servo installation rough spots become glaring servo gear problem dirty servo pot linkage friction shows up departure what know should perfectly smooth electrically controlled mechanical operation never need turn transmitter instance servo funny servo problem servo tested silky smooth Cycler transmitter stick pot culpritit Servo Cycler can built using common tools some soldering ability assembled parts current Radio Shack catalog Most parts mounted standard printed-circuit holeboard custom etching required other items need complete Cycler connectors brand radio equipment easily cut aileron extensions some hardware Cycler equipped 34 Model Aviation o Cycler powered receiver pack automaticallY sweeps suspect servo over its motion range out model Servo Cycler powered receiver pack automatically Panel Assembly can built RC leadout wire sweeps suspect servo over its motion range out model setstwo shown Note wood blocks pots two input output connector sets fit installations Checkout calibration requires known good working servo Digital Volt Meter Cut pc holeboard size Study photos count holes drill two /32 mounting holes locations pictured Cut printed conductors X locations Install wire jumpers Jumpers drawing jumper wires #24 #26 bare tinned copper wire except three insulated wires serve leadout wire strain reliefs Two active jumpers shaped half-loops battery negative battery positive test use during checkout Some holeboard holes accommodate two wires Two jumpers located under forthcoming IC sockets solder after sockets place comes next should 27 wires board after step Please confirm before proceeding Install sockets identifier notches located shown helps avoid IC installation errors ICs will installed later chose install trim pots next followed two transistors sure orient transistors correctly capacitors can installed next noting Cl polarized Follow diodes Dl D2 Dl shown cathodeup D2 installed cathode-down black band diodes marks cathode terminal Complete assembly resistor installation board-to-panel wires will installed later Inspect work tidying up imperfect solder joints clearing solder bridges suggest using lens aid task Clean solder side assembly solvent such acetone small brush Minimize getting solvent component side board blow/blot dry set assembly aside Mark drill hole pattern 1 see text parts list Ri 3 notebattery Positive 11 ti battery negator SERVO CYCLER -- SCHEMATIC -1s,xvverrxs II vrsnrr Thy 7AAssvvrvxvvxxvvtcr NOTE ' -MOUNTED ON PANEL BOARD TO PANEL WIRE fest pxier see text September 1998 35 Panel-to-pc-board wiring has 10 interconnecting wires Allow Completed Servo Cycler internal assembly Note pc board slack position board properly panel assembly orientation rotated 18O previous photo -i--Il-z\I -I -XII V 4-SERVO CYCLER -- PCBOARDASSEMBLY -- JUMPERS TO 01 pIT1TO 101 Xn2&RS TO RIDTX DX RORROT AXOIXOX XIS salterS SOTE LEAD DRRSS EXPLODED HERE FOR CLARITY TEST POINT SEE TEXT SERVO CYCLER -- BACKOF PANEL WIRING TX S ER XX 0103 01 XPDEXI XeeteXOOXXXVsIMaOXMATXeIeCW0caI II 14dVIi44 CI CSXS4T CRXX2X1-1—C S CXXI iiT tIiV I-r--TOO/S.2S~7 -022DXT111 LC31C3XIL CILMXOXXI XTLCTRR--V ~RITTDO -....Jt V- 0 V VV V MIT OXT rV R540SOlDRIROt013070 V, VXVRT o XV VVVVVRRVOTV IT RIOTT V TRASSLESOXREXaTSSVeXae SalleX PCXIiE RXXTX TX IXUE WIRE RRD TX PACEL W TINS EXPoXTEX EXT C RIOT RRSIXTXSCR IN CXPXCITXRCR OF SERVO CYCLER -- POBOARDASSEMBLY -- TOP VIEW aluminum cover plate deburr used printed paper label dress-up panel paper overlaid ContactTM brand clear self-stick sheet durability paper side adhered metal panel Scotch 77 spray contact adhesive numbering shown around knobs Cycler has no quantitative significance Its logging scale serves roughly indicate relative knob position useful allow easy resetting knob specific point Mount panel mounted components shown two phono jacks shown battery servo locations optional convenience connectors use connecting other equipment such Pulse Mini-Lab [MA June 1998] oscilloscope etc essential basic operation Servo Cycler make excellent internal tie points input output RC connector cables latter can connected appropriate available locations hole board phono jacks installed Cut two small 3/ x 3/ x 3/4 wooden blocks hard balsa pine spruce adhere control pots R17 R4 shown using /16 double-stick foam tape Temporarily position pc board assembly blocks being sure its centered mark mounting hole locations Remove pc board drill 1A6 pilot holes wood blocks marked locations being careful drill through blocks pots pc board will mounted later #2 x 3/ sheet-metal screws Position pc board panel alongside other begin board-topanel wiring used Ace colored RC wire Confirm 10 interconnecting wires youre done assembly wiring done recheck everything Electrical checkout can approached several ways Because receiver packs can deliver significant current under fault conditions Im going describe conservative approach makes use temporary off-board resistor Rx will minimize likelihood damage just case have assembly error oversight some steps will measuring circuit voltages DVM discussed below meter test points illustrated schematic board assembly panel drawings Except temporary resistor Rx voltages measured meter negative lead pc board battery negative loop positive meter lead placed instructed suggest using test leads equipped mini test clips access described test points minimize accidental shorts bulky test connectors example test voltage values below Cycler based battery 36 Model Aviation 6 5/8 1WHOLEO11ft. 0 18 15/16I - I 11/2 NOTE PANEL IS FOR RADIO SHACK 270-1803 PLASTIC ENCLOSURE SERVO CYCLER L DIMENSIONING TOORD ROOT) FROM 101 PIT RTOOl PIE 10 00101 p1114 IX II selOX5131 TO 8R0 RATT TORiX p11StORDIDYXIM DIStIlMdlSpeed RiORiO R4 1150 CV IC 1 1C2 QI Q2 D1D2 SEMICONDUCTORS LM324 Quad Operational Amp TLC555 CMOS Timer MP53904 NPN Transistor MP52907 PNP Transistor 1N4148 Switching Diode CAPACITORS Cl10 uFd 35V Radial Aluminum C210 uFd Non-Polarized Electrolytic C301 uFd 50V Mylar C401 uFd uFd monolythic CS0047 uFd Mylar C60022 uFd 50V Mylar Ri R9 R2R3RlI R12 R19 R5R6R1O R7 R8 R13 NOTE* R14 R18 R2 Rx FIXED RESISTORS 1h watt carbon film 47K 33K 47K lOOK 10K 270K 22K 22K 1K 100 ohms temporary 276-1711 276-1718 276-2016 276-2023 276-1122 272-1025 272-999 272-1069 272-109 272-1068 272-1066 271-1330 271-1328 271-1342 271-1347 271-1335 RSU1 1345337 271-1325 271-1339 271-1321 271-1311 * NOTE can make 270K wiring 220K 271-1350 47K 271-1342 series see option illustrated pc board assembly drawing VARIABLE RESISTORS R4 RiS R16 R17 R20 meg Linear Taper Variable 100K Trimmer 50K Linear Taper Variable 1K Trimmer 271-211 27 1-284 271-1716 27 1-280 SWITCHES CONNECTORS AND SOCKETS SWiSPDT Toggle 2Phono Jacks optional 18 Pin IC DIP Socket 114 Pin IC DIP Socket MISCELLANEOUS MECHANICAL Project Box Universal PC Board Assortment ACE R/C Colored Wire 24 Guage Wire tinned 3 Knobs 2 #2 X 3/s sheet metal screws 2 I/4 grommets Wood blocks double-stick foam tape 275-625 274-346 276-1995 276-1999 270-1803 276-168 278-1341 274-415 64-3025 see text September 1998 37 SERVO CYCLER PARTS LIST RC system aileron extension / connector set A/R Panel labeling desired Hitec RCD has tools make hobby fun a Peak cut-off automatic trickle 11 Amp Glow charging 4-24 cells adjustable 05-5 Amps 24 cells charge 3 Amps full line radio systems servos receivers speed controls chargers offer high quality dependable equipment affordable price year factory warranty award-winning Hitec service department enough reason call hobby dealer today ask Hitec RCD products Now go out have fun 74 /Qt4 P4iC4 LCD panel Amp voltage display Simultaneous 3-in-i charging capability information call 619 258-4940 write Hitec RCD Inc 10729 Wheatlands Ave Suite C Santee CA 92071 measuring 48 volts Batteries differ exact value OK corresponding test values below will proportion actual battery voltage used Temporarily wire 100 ohm /4 watt carbon resistor Rx series receiver battery positive lead can done temporary adapter cord using modified aileron extensions soldering temporary resistor series pc board Begin checkout setting Cycle Speed Cycle Width controls fully counterclockwise CCW Pulse Width control about midrange Set switch SWi triangle position Set trimmer resistors RI 5 R20 about midrange no ICs installed sockets set DVM/DMM 2 3 volt range connect across 100 ohm resistor Polarity does matter connect 48 volt receiver battery Under condition should reading about 18 volts across test resistor indicates normal static current draw about 18 milliamps proceed beyond step does produce correct result correcting problem Disconnect battery install 1C2 correctly oriented can damage IC incorrect installation Reconnect power meter should now read about 10% higher OK connect DVM negative lead pc board battery negative test loop positive lead battery positive test loop Note reading Connect meter positive ICI pin 14 best accessed Cycle Width control R16 voltage should about 29 times measured battery voltage reading within K Move DVM positive collector Ql top wire R9 convenient read about twice pin 14 value OK disconnect battery install ICl reconnect power reconnect DVM across test resistor Rx observe meter reading about 23 34 volts RADIO SOUTH INC PRO-DRIVER Contains 4 1300 mah battery cells senses plug fouled & boosts power LED bar garaph meter display plug condition Supports Futaba J chargers Sale Price $5300 I7 PRO-DRIVER MARK II auto shut down Sale Price $5800 3702 N Pace Pensacola FL 32505 Toll Free Order Line Orders Only Please 800-962-7802 Repair Informatien 850-434-0909 visit website http//www wtp net/OBEST/radioseuth/RS1 html PRO-HINGES Easiest Hinge Install use cyanocrylate adhesives nO- $24g/pkg 18 Scale $279/pkg 24 available local hobby shop order direct DEALER INQUIRIES INVITED 2 38 Model Aviation gy Management Tools Introdudng new generation 12-volt DC input delta peak field chargers Hitec RCD CG-330 Features CG-335 offers features CG-330 Also just fun 1015 gas theAKROisaBLASTi havent experienced Speed 400 flying until youve flown new STEPHENS AKRO AKRO blast fly has full aerobatic capabilities can take-offs landings less fifty feet full-house setup skies limit AKRO AKRO kit comes complete 3-piece epoxy fiberglass fuselage foam core wings aluminum landing gear struts wheel pants clear canopy complete hardware package full-size plans instructions Order AKRO today have blast AKRO KIT #101 28 fact reading should step between approximate levels indicating operation function generator patient observation Cycle Speed should very slow about 20 seconds Reconnect DVM leads pc board DVM positive ICib pin 1 accessible right SWi battery connected should see DVM tracking slowly smoothly varying voltage about 8 volt about 2 volts Sometimes numbers may hard catch fly since some meters have slow response Move DVM positive back Qi collector R9 wire watch reading alternate slow rate between O about 28 volts get results carefully recheck assembly above OK disconnect battery remove temporary 100 ohm resistor youre done Because Radio Shack pots electrical rotation does line up exactly mechanical rotation its necessary find electrical center Pulse Width control R17 temporarily disconnecting wires two used pot terminals measure total outside terminal outside terminal resistance DMM set Ohms example R17 read 469 Ohms reasonable tolerance 50K pot Divide number two -235K Connect ohmmeter outside terminal center wiper terminal rotate pot shaft calculated value pot now electrical center Without moving justset shaft position loosen adjust knob pointer position center itthus indicating neutral future servo testing Resolder loosened pot wire mount pc board assembly panel Select known good servo use radio system establish define its neutral output arm position suggest using aileron elevator channel sure stick trims centered servo its neutral output arm position will used transfer standard calibrate Cycler Connect servo Cycler output lead connect battery Pulse Width knob positioned above adjust trimmer R20 necessary bring servo arm its established neutral position Move Pulse Width control knob over range observe corresponding servo movement available range motion should actually exceed what occurs full stick trim travel transmitter Reset PW control knob mid position servo neutral Adjust Cycle Width knob CW about halfway observe slow smooth sweep servo about position set above Switch SWI square wave side observe stepped -bang-bang movement servo Again patient 40 Model Aviation 4Dealer inquiries invited 9300 Yvette Marie NW PO Box 66527 Albuqterque NM 871 93-6527 Order 505 890-7549 Website wwwkamodels corn SIERActual Meister Scale F4U corsair Bunt John West takes Now can vary Cycle Speed Width controls wish make servo dance caution Cycler capable about cycle per second back forth drive servo very fast Under conditions servo current can get quite high moving rapid backand-forth manner servo actually conditions worse stall can quite hard servo amplifier can cause overheating failure operate servo few seconds highest sweep speed Lower rate cycling normal transmitter stick motion no concern may have built Pulse Mini-Lab have other measurement options careful calibration Servo Cycler can made Trimmer RIS can set closely exact transmitter frame rate critical servos important certain electronic speed controls ESCs used Electric flight Its positively awesome control ESC Cycler watch E-power system slew back forth over power range itself can also set R20 carefully symmetrical control range PW controlbut like things nearly perfect Incidentals Servo Cycler will work perfectly four- five-cell receiver packs will actually work below about 45 volts battery needs charged anyway R13 can made up two resistors shown assembly drawing parts list will negate necessity special order particular value recommended Radio Shack plastic box has internal bosses base have interference fit simply drill em off 3/ bit taking care go through box bottom have variety radio brands can install set input output leads did Another option use example Deans input output connectors use Deans-towhatever adaptors get different servo connector types Aside observing anomalous servo arm behavior can also listen servo sound funnies holding servo ear Cycler smoothly sweeping have used Cycler eight different servo brands/model types some ESCs well work just fine hope find Cycler liking helpful have welcome question comment about its design application Please enclose SASE correspondence youd like reply Kopski 25 West End Dr Lansdale PA 19446 42 Model Aviation 4Your SCALE HEADQUARTERS 1 AhIE hA CAIE AAflflI flhIJ TEIP AY WAY Balsa/Ply Construction Fiberglass & Plastic Accessories Plans Partial Full Kits Available Engineered Lazy Builders Custom Retracts Vinyl Decal Sets Available tor Designs Custom Building Service Available SEND IN FOR FREE CATALOG ItK SCALE 163vnwf49 NENC 2

SER 0 CYCLER Servo Cycler 5 simple low-cost easily built test accessory serious modeler automatically cycles servos throughout range motion very controlled manner precision servo drive causes servo installation anomalies stand right out get attention example its uncommon servo pots wear near servo neutral cause some surface jitter sometimes servo-to-surface linkage may bind somewhere displacement range Cycler can highlight such problems ease Servo Cycler fully adjustable can set allow manual dialing servo position just like ordinary servo driver Cycler can set automatically move servo amount zero past normal full-range adjustable speed Cycle Speed ranges about 20 seconds per cycle about 20 times faster Cycler connected between receiver receiver battery servo out model can signal servo jump back forth bang-bang manner see servo settles throw limit can sweep servo over same worn dirty U Bob Kopski rangefar smoothly repeatably can ever move transmitter control hand Its mode servo installation rough spots become glaring servo gear problem dirty servo pot linkage friction shows up departure what know should perfectly smooth electrically controlled mechanical operation never need turn transmitter instance servo funny servo problem servo tested silky smooth Cycler transmitter stick pot culpritit Servo Cycler can built using common tools some soldering ability assembled parts current Radio Shack catalog Most parts mounted standard printed-circuit holeboard custom etching required other items need complete Cycler connectors brand radio equipment easily cut aileron extensions some hardware Cycler equipped 34 Model Aviation o Cycler powered receiver pack automaticallY sweeps suspect servo over its motion range out model Servo Cycler powered receiver pack automatically Panel Assembly can built RC leadout wire sweeps suspect servo over its motion range out model setstwo shown Note wood blocks pots two input output connector sets fit installations Checkout calibration requires known good working servo Digital Volt Meter Cut pc holeboard size Study photos count holes drill two /32 mounting holes locations pictured Cut printed conductors X locations Install wire jumpers Jumpers drawing jumper wires #24 #26 bare tinned copper wire except three insulated wires serve leadout wire strain reliefs Two active jumpers shaped half-loops battery negative battery positive test use during checkout Some holeboard holes accommodate two wires Two jumpers located under forthcoming IC sockets solder after sockets place comes next should 27 wires board after step Please confirm before proceeding Install sockets identifier notches located shown helps avoid IC installation errors ICs will installed later chose install trim pots next followed two transistors sure orient transistors correctly capacitors can installed next noting Cl polarized Follow diodes Dl D2 Dl shown cathodeup D2 installed cathode-down black band diodes marks cathode terminal Complete assembly resistor installation board-to-panel wires will installed later Inspect work tidying up imperfect solder joints clearing solder bridges suggest using lens aid task Clean solder side assembly solvent such acetone small brush Minimize getting solvent component side board blow/blot dry set assembly aside Mark drill hole pattern 1 see text parts list Ri 3 notebattery Positive 11 ti battery negator SERVO CYCLER -- SCHEMATIC -1s,xvverrxs II vrsnrr Thy 7AAssvvrvxvvxxvvtcr NOTE ' -MOUNTED ON PANEL BOARD TO PANEL WIRE fest pxier see text September 1998 35 Panel-to-pc-board wiring has 10 interconnecting wires Allow Completed Servo Cycler internal assembly Note pc board slack position board properly panel assembly orientation rotated 18O previous photo -i--Il-z\I -I -XII V 4-SERVO CYCLER -- PCBOARDASSEMBLY -- JUMPERS TO 01 pIT1TO 101 Xn2&RS TO RIDTX DX RORROT AXOIXOX XIS salterS SOTE LEAD DRRSS EXPLODED HERE FOR CLARITY TEST POINT SEE TEXT SERVO CYCLER -- BACKOF PANEL WIRING TX S ER XX 0103 01 XPDEXI XeeteXOOXXXVsIMaOXMATXeIeCW0caI II 14dVIi44 CI CSXS4T CRXX2X1-1—C S CXXI iiT tIiV I-r--TOO/S.2S~7 -022DXT111 LC31C3XIL CILMXOXXI XTLCTRR--V ~RITTDO -....Jt V- 0 V VV V MIT OXT rV R540SOlDRIROt013070 V, VXVRT o XV VVVVVRRVOTV IT RIOTT V TRASSLESOXREXaTSSVeXae SalleX PCXIiE RXXTX TX IXUE WIRE RRD TX PACEL W TINS EXPoXTEX EXT C RIOT RRSIXTXSCR IN CXPXCITXRCR OF SERVO CYCLER -- POBOARDASSEMBLY -- TOP VIEW aluminum cover plate deburr used printed paper label dress-up panel paper overlaid ContactTM brand clear self-stick sheet durability paper side adhered metal panel Scotch 77 spray contact adhesive numbering shown around knobs Cycler has no quantitative significance Its logging scale serves roughly indicate relative knob position useful allow easy resetting knob specific point Mount panel mounted components shown two phono jacks shown battery servo locations optional convenience connectors use connecting other equipment such Pulse Mini-Lab [MA June 1998] oscilloscope etc essential basic operation Servo Cycler make excellent internal tie points input output RC connector cables latter can connected appropriate available locations hole board phono jacks installed Cut two small 3/ x 3/ x 3/4 wooden blocks hard balsa pine spruce adhere control pots R17 R4 shown using /16 double-stick foam tape Temporarily position pc board assembly blocks being sure its centered mark mounting hole locations Remove pc board drill 1A6 pilot holes wood blocks marked locations being careful drill through blocks pots pc board will mounted later #2 x 3/ sheet-metal screws Position pc board panel alongside other begin board-topanel wiring used Ace colored RC wire Confirm 10 interconnecting wires youre done assembly wiring done recheck everything Electrical checkout can approached several ways Because receiver packs can deliver significant current under fault conditions Im going describe conservative approach makes use temporary off-board resistor Rx will minimize likelihood damage just case have assembly error oversight some steps will measuring circuit voltages DVM discussed below meter test points illustrated schematic board assembly panel drawings Except temporary resistor Rx voltages measured meter negative lead pc board battery negative loop positive meter lead placed instructed suggest using test leads equipped mini test clips access described test points minimize accidental shorts bulky test connectors example test voltage values below Cycler based battery 36 Model Aviation 6 5/8 1WHOLEO11ft. 0 18 15/16I - I 11/2 NOTE PANEL IS FOR RADIO SHACK 270-1803 PLASTIC ENCLOSURE SERVO CYCLER L DIMENSIONING TOORD ROOT) FROM 101 PIT RTOOl PIE 10 00101 p1114 IX II selOX5131 TO 8R0 RATT TORiX p11StORDIDYXIM DIStIlMdlSpeed RiORiO R4 1150 CV IC 1 1C2 QI Q2 D1D2 SEMICONDUCTORS LM324 Quad Operational Amp TLC555 CMOS Timer MP53904 NPN Transistor MP52907 PNP Transistor 1N4148 Switching Diode CAPACITORS Cl10 uFd 35V Radial Aluminum C210 uFd Non-Polarized Electrolytic C301 uFd 50V Mylar C401 uFd uFd monolythic CS0047 uFd Mylar C60022 uFd 50V Mylar Ri R9 R2R3RlI R12 R19 R5R6R1O R7 R8 R13 NOTE* R14 R18 R2 Rx FIXED RESISTORS 1h watt carbon film 47K 33K 47K lOOK 10K 270K 22K 22K 1K 100 ohms temporary 276-1711 276-1718 276-2016 276-2023 276-1122 272-1025 272-999 272-1069 272-109 272-1068 272-1066 271-1330 271-1328 271-1342 271-1347 271-1335 RSU1 1345337 271-1325 271-1339 271-1321 271-1311 * NOTE can make 270K wiring 220K 271-1350 47K 271-1342 series see option illustrated pc board assembly drawing VARIABLE RESISTORS R4 RiS R16 R17 R20 meg Linear Taper Variable 100K Trimmer 50K Linear Taper Variable 1K Trimmer 271-211 27 1-284 271-1716 27 1-280 SWITCHES CONNECTORS AND SOCKETS SWiSPDT Toggle 2Phono Jacks optional 18 Pin IC DIP Socket 114 Pin IC DIP Socket MISCELLANEOUS MECHANICAL Project Box Universal PC Board Assortment ACE R/C Colored Wire 24 Guage Wire tinned 3 Knobs 2 #2 X 3/s sheet metal screws 2 I/4 grommets Wood blocks double-stick foam tape 275-625 274-346 276-1995 276-1999 270-1803 276-168 278-1341 274-415 64-3025 see text September 1998 37 SERVO CYCLER PARTS LIST RC system aileron extension / connector set A/R Panel labeling desired Hitec RCD has tools make hobby fun a Peak cut-off automatic trickle 11 Amp Glow charging 4-24 cells adjustable 05-5 Amps 24 cells charge 3 Amps full line radio systems servos receivers speed controls chargers offer high quality dependable equipment affordable price year factory warranty award-winning Hitec service department enough reason call hobby dealer today ask Hitec RCD products Now go out have fun 74 /Qt4 P4iC4 LCD panel Amp voltage display Simultaneous 3-in-i charging capability information call 619 258-4940 write Hitec RCD Inc 10729 Wheatlands Ave Suite C Santee CA 92071 measuring 48 volts Batteries differ exact value OK corresponding test values below will proportion actual battery voltage used Temporarily wire 100 ohm /4 watt carbon resistor Rx series receiver battery positive lead can done temporary adapter cord using modified aileron extensions soldering temporary resistor series pc board Begin checkout setting Cycle Speed Cycle Width controls fully counterclockwise CCW Pulse Width control about midrange Set switch SWi triangle position Set trimmer resistors RI 5 R20 about midrange no ICs installed sockets set DVM/DMM 2 3 volt range connect across 100 ohm resistor Polarity does matter connect 48 volt receiver battery Under condition should reading about 18 volts across test resistor indicates normal static current draw about 18 milliamps proceed beyond step does produce correct result correcting problem Disconnect battery install 1C2 correctly oriented can damage IC incorrect installation Reconnect power meter should now read about 10% higher OK connect DVM negative lead pc board battery negative test loop positive lead battery positive test loop Note reading Connect meter positive ICI pin 14 best accessed Cycle Width control R16 voltage should about 29 times measured battery voltage reading within K Move DVM positive collector Ql top wire R9 convenient read about twice pin 14 value OK disconnect battery install ICl reconnect power reconnect DVM across test resistor Rx observe meter reading about 23 34 volts RADIO SOUTH INC PRO-DRIVER Contains 4 1300 mah battery cells senses plug fouled & boosts power LED bar garaph meter display plug condition Supports Futaba J chargers Sale Price $5300 I7 PRO-DRIVER MARK II auto shut down Sale Price $5800 3702 N Pace Pensacola FL 32505 Toll Free Order Line Orders Only Please 800-962-7802 Repair Informatien 850-434-0909 visit website http//www wtp net/OBEST/radioseuth/RS1 html PRO-HINGES Easiest Hinge Install use cyanocrylate adhesives nO- $24g/pkg 18 Scale $279/pkg 24 available local hobby shop order direct DEALER INQUIRIES INVITED 2 38 Model Aviation gy Management Tools Introdudng new generation 12-volt DC input delta peak field chargers Hitec RCD CG-330 Features CG-335 offers features CG-330 Also just fun 1015 gas theAKROisaBLASTi havent experienced Speed 400 flying until youve flown new STEPHENS AKRO AKRO blast fly has full aerobatic capabilities can take-offs landings less fifty feet full-house setup skies limit AKRO AKRO kit comes complete 3-piece epoxy fiberglass fuselage foam core wings aluminum landing gear struts wheel pants clear canopy complete hardware package full-size plans instructions Order AKRO today have blast AKRO KIT #101 28 fact reading should step between approximate levels indicating operation function generator patient observation Cycle Speed should very slow about 20 seconds Reconnect DVM leads pc board DVM positive ICib pin 1 accessible right SWi battery connected should see DVM tracking slowly smoothly varying voltage about 8 volt about 2 volts Sometimes numbers may hard catch fly since some meters have slow response Move DVM positive back Qi collector R9 wire watch reading alternate slow rate between O about 28 volts get results carefully recheck assembly above OK disconnect battery remove temporary 100 ohm resistor youre done Because Radio Shack pots electrical rotation does line up exactly mechanical rotation its necessary find electrical center Pulse Width control R17 temporarily disconnecting wires two used pot terminals measure total outside terminal outside terminal resistance DMM set Ohms example R17 read 469 Ohms reasonable tolerance 50K pot Divide number two -235K Connect ohmmeter outside terminal center wiper terminal rotate pot shaft calculated value pot now electrical center Without moving justset shaft position loosen adjust knob pointer position center itthus indicating neutral future servo testing Resolder loosened pot wire mount pc board assembly panel Select known good servo use radio system establish define its neutral output arm position suggest using aileron elevator channel sure stick trims centered servo its neutral output arm position will used transfer standard calibrate Cycler Connect servo Cycler output lead connect battery Pulse Width knob positioned above adjust trimmer R20 necessary bring servo arm its established neutral position Move Pulse Width control knob over range observe corresponding servo movement available range motion should actually exceed what occurs full stick trim travel transmitter Reset PW control knob mid position servo neutral Adjust Cycle Width knob CW about halfway observe slow smooth sweep servo about position set above Switch SWI square wave side observe stepped -bang-bang movement servo Again patient 40 Model Aviation 4Dealer inquiries invited 9300 Yvette Marie NW PO Box 66527 Albuqterque NM 871 93-6527 Order 505 890-7549 Website wwwkamodels corn SIERActual Meister Scale F4U corsair Bunt John West takes Now can vary Cycle Speed Width controls wish make servo dance caution Cycler capable about cycle per second back forth drive servo very fast Under conditions servo current can get quite high moving rapid backand-forth manner servo actually conditions worse stall can quite hard servo amplifier can cause overheating failure operate servo few seconds highest sweep speed Lower rate cycling normal transmitter stick motion no concern may have built Pulse Mini-Lab have other measurement options careful calibration Servo Cycler can made Trimmer RIS can set closely exact transmitter frame rate critical servos important certain electronic speed controls ESCs used Electric flight Its positively awesome control ESC Cycler watch E-power system slew back forth over power range itself can also set R20 carefully symmetrical control range PW controlbut like things nearly perfect Incidentals Servo Cycler will work perfectly four- five-cell receiver packs will actually work below about 45 volts battery needs charged anyway R13 can made up two resistors shown assembly drawing parts list will negate necessity special order particular value recommended Radio Shack plastic box has internal bosses base have interference fit simply drill em off 3/ bit taking care go through box bottom have variety radio brands can install set input output leads did Another option use example Deans input output connectors use Deans-towhatever adaptors get different servo connector types Aside observing anomalous servo arm behavior can also listen servo sound funnies holding servo ear Cycler smoothly sweeping have used Cycler eight different servo brands/model types some ESCs well work just fine hope find Cycler liking helpful have welcome question comment about its design application Please enclose SASE correspondence youd like reply Kopski 25 West End Dr Lansdale PA 19446 42 Model Aviation 4Your SCALE HEADQUARTERS 1 AhIE hA CAIE AAflflI flhIJ TEIP AY WAY Balsa/Ply Construction Fiberglass & Plastic Accessories Plans Partial Full Kits Available Engineered Lazy Builders Custom Retracts Vinyl Decal Sets Available tor Designs Custom Building Service Available SEND IN FOR FREE CATALOG ItK SCALE 163vnwf49 NENC 2

SER 0 CYCLER Servo Cycler 5 simple low-cost easily built test accessory serious modeler automatically cycles servos throughout range motion very controlled manner precision servo drive causes servo installation anomalies stand right out get attention example its uncommon servo pots wear near servo neutral cause some surface jitter sometimes servo-to-surface linkage may bind somewhere displacement range Cycler can highlight such problems ease Servo Cycler fully adjustable can set allow manual dialing servo position just like ordinary servo driver Cycler can set automatically move servo amount zero past normal full-range adjustable speed Cycle Speed ranges about 20 seconds per cycle about 20 times faster Cycler connected between receiver receiver battery servo out model can signal servo jump back forth bang-bang manner see servo settles throw limit can sweep servo over same worn dirty U Bob Kopski rangefar smoothly repeatably can ever move transmitter control hand Its mode servo installation rough spots become glaring servo gear problem dirty servo pot linkage friction shows up departure what know should perfectly smooth electrically controlled mechanical operation never need turn transmitter instance servo funny servo problem servo tested silky smooth Cycler transmitter stick pot culpritit Servo Cycler can built using common tools some soldering ability assembled parts current Radio Shack catalog Most parts mounted standard printed-circuit holeboard custom etching required other items need complete Cycler connectors brand radio equipment easily cut aileron extensions some hardware Cycler equipped 34 Model Aviation o Cycler powered receiver pack automaticallY sweeps suspect servo over its motion range out model Servo Cycler powered receiver pack automatically Panel Assembly can built RC leadout wire sweeps suspect servo over its motion range out model setstwo shown Note wood blocks pots two input output connector sets fit installations Checkout calibration requires known good working servo Digital Volt Meter Cut pc holeboard size Study photos count holes drill two /32 mounting holes locations pictured Cut printed conductors X locations Install wire jumpers Jumpers drawing jumper wires #24 #26 bare tinned copper wire except three insulated wires serve leadout wire strain reliefs Two active jumpers shaped half-loops battery negative battery positive test use during checkout Some holeboard holes accommodate two wires Two jumpers located under forthcoming IC sockets solder after sockets place comes next should 27 wires board after step Please confirm before proceeding Install sockets identifier notches located shown helps avoid IC installation errors ICs will installed later chose install trim pots next followed two transistors sure orient transistors correctly capacitors can installed next noting Cl polarized Follow diodes Dl D2 Dl shown cathodeup D2 installed cathode-down black band diodes marks cathode terminal Complete assembly resistor installation board-to-panel wires will installed later Inspect work tidying up imperfect solder joints clearing solder bridges suggest using lens aid task Clean solder side assembly solvent such acetone small brush Minimize getting solvent component side board blow/blot dry set assembly aside Mark drill hole pattern 1 see text parts list Ri 3 notebattery Positive 11 ti battery negator SERVO CYCLER -- SCHEMATIC -1s,xvverrxs II vrsnrr Thy 7AAssvvrvxvvxxvvtcr NOTE ' -MOUNTED ON PANEL BOARD TO PANEL WIRE fest pxier see text September 1998 35 Panel-to-pc-board wiring has 10 interconnecting wires Allow Completed Servo Cycler internal assembly Note pc board slack position board properly panel assembly orientation rotated 18O previous photo -i--Il-z\I -I -XII V 4-SERVO CYCLER -- PCBOARDASSEMBLY -- JUMPERS TO 01 pIT1TO 101 Xn2&RS TO RIDTX DX RORROT AXOIXOX XIS salterS SOTE LEAD DRRSS EXPLODED HERE FOR CLARITY TEST POINT SEE TEXT SERVO CYCLER -- BACKOF PANEL WIRING TX S ER XX 0103 01 XPDEXI XeeteXOOXXXVsIMaOXMATXeIeCW0caI II 14dVIi44 CI CSXS4T CRXX2X1-1—C S CXXI iiT tIiV I-r--TOO/S.2S~7 -022DXT111 LC31C3XIL CILMXOXXI XTLCTRR--V ~RITTDO -....Jt V- 0 V VV V MIT OXT rV R540SOlDRIROt013070 V, VXVRT o XV VVVVVRRVOTV IT RIOTT V TRASSLESOXREXaTSSVeXae SalleX PCXIiE RXXTX TX IXUE WIRE RRD TX PACEL W TINS EXPoXTEX EXT C RIOT RRSIXTXSCR IN CXPXCITXRCR OF SERVO CYCLER -- POBOARDASSEMBLY -- TOP VIEW aluminum cover plate deburr used printed paper label dress-up panel paper overlaid ContactTM brand clear self-stick sheet durability paper side adhered metal panel Scotch 77 spray contact adhesive numbering shown around knobs Cycler has no quantitative significance Its logging scale serves roughly indicate relative knob position useful allow easy resetting knob specific point Mount panel mounted components shown two phono jacks shown battery servo locations optional convenience connectors use connecting other equipment such Pulse Mini-Lab [MA June 1998] oscilloscope etc essential basic operation Servo Cycler make excellent internal tie points input output RC connector cables latter can connected appropriate available locations hole board phono jacks installed Cut two small 3/ x 3/ x 3/4 wooden blocks hard balsa pine spruce adhere control pots R17 R4 shown using /16 double-stick foam tape Temporarily position pc board assembly blocks being sure its centered mark mounting hole locations Remove pc board drill 1A6 pilot holes wood blocks marked locations being careful drill through blocks pots pc board will mounted later #2 x 3/ sheet-metal screws Position pc board panel alongside other begin board-topanel wiring used Ace colored RC wire Confirm 10 interconnecting wires youre done assembly wiring done recheck everything Electrical checkout can approached several ways Because receiver packs can deliver significant current under fault conditions Im going describe conservative approach makes use temporary off-board resistor Rx will minimize likelihood damage just case have assembly error oversight some steps will measuring circuit voltages DVM discussed below meter test points illustrated schematic board assembly panel drawings Except temporary resistor Rx voltages measured meter negative lead pc board battery negative loop positive meter lead placed instructed suggest using test leads equipped mini test clips access described test points minimize accidental shorts bulky test connectors example test voltage values below Cycler based battery 36 Model Aviation 6 5/8 1WHOLEO11ft. 0 18 15/16I - I 11/2 NOTE PANEL IS FOR RADIO SHACK 270-1803 PLASTIC ENCLOSURE SERVO CYCLER L DIMENSIONING TOORD ROOT) FROM 101 PIT RTOOl PIE 10 00101 p1114 IX II selOX5131 TO 8R0 RATT TORiX p11StORDIDYXIM DIStIlMdlSpeed RiORiO R4 1150 CV IC 1 1C2 QI Q2 D1D2 SEMICONDUCTORS LM324 Quad Operational Amp TLC555 CMOS Timer MP53904 NPN Transistor MP52907 PNP Transistor 1N4148 Switching Diode CAPACITORS Cl10 uFd 35V Radial Aluminum C210 uFd Non-Polarized Electrolytic C301 uFd 50V Mylar C401 uFd uFd monolythic CS0047 uFd Mylar C60022 uFd 50V Mylar Ri R9 R2R3RlI R12 R19 R5R6R1O R7 R8 R13 NOTE* R14 R18 R2 Rx FIXED RESISTORS 1h watt carbon film 47K 33K 47K lOOK 10K 270K 22K 22K 1K 100 ohms temporary 276-1711 276-1718 276-2016 276-2023 276-1122 272-1025 272-999 272-1069 272-109 272-1068 272-1066 271-1330 271-1328 271-1342 271-1347 271-1335 RSU1 1345337 271-1325 271-1339 271-1321 271-1311 * NOTE can make 270K wiring 220K 271-1350 47K 271-1342 series see option illustrated pc board assembly drawing VARIABLE RESISTORS R4 RiS R16 R17 R20 meg Linear Taper Variable 100K Trimmer 50K Linear Taper Variable 1K Trimmer 271-211 27 1-284 271-1716 27 1-280 SWITCHES CONNECTORS AND SOCKETS SWiSPDT Toggle 2Phono Jacks optional 18 Pin IC DIP Socket 114 Pin IC DIP Socket MISCELLANEOUS MECHANICAL Project Box Universal PC Board Assortment ACE R/C Colored Wire 24 Guage Wire tinned 3 Knobs 2 #2 X 3/s sheet metal screws 2 I/4 grommets Wood blocks double-stick foam tape 275-625 274-346 276-1995 276-1999 270-1803 276-168 278-1341 274-415 64-3025 see text September 1998 37 SERVO CYCLER PARTS LIST RC system aileron extension / connector set A/R Panel labeling desired Hitec RCD has tools make hobby fun a Peak cut-off automatic trickle 11 Amp Glow charging 4-24 cells adjustable 05-5 Amps 24 cells charge 3 Amps full line radio systems servos receivers speed controls chargers offer high quality dependable equipment affordable price year factory warranty award-winning Hitec service department enough reason call hobby dealer today ask Hitec RCD products Now go out have fun 74 /Qt4 P4iC4 LCD panel Amp voltage display Simultaneous 3-in-i charging capability information call 619 258-4940 write Hitec RCD Inc 10729 Wheatlands Ave Suite C Santee CA 92071 measuring 48 volts Batteries differ exact value OK corresponding test values below will proportion actual battery voltage used Temporarily wire 100 ohm /4 watt carbon resistor Rx series receiver battery positive lead can done temporary adapter cord using modified aileron extensions soldering temporary resistor series pc board Begin checkout setting Cycle Speed Cycle Width controls fully counterclockwise CCW Pulse Width control about midrange Set switch SWi triangle position Set trimmer resistors RI 5 R20 about midrange no ICs installed sockets set DVM/DMM 2 3 volt range connect across 100 ohm resistor Polarity does matter connect 48 volt receiver battery Under condition should reading about 18 volts across test resistor indicates normal static current draw about 18 milliamps proceed beyond step does produce correct result correcting problem Disconnect battery install 1C2 correctly oriented can damage IC incorrect installation Reconnect power meter should now read about 10% higher OK connect DVM negative lead pc board battery negative test loop positive lead battery positive test loop Note reading Connect meter positive ICI pin 14 best accessed Cycle Width control R16 voltage should about 29 times measured battery voltage reading within K Move DVM positive collector Ql top wire R9 convenient read about twice pin 14 value OK disconnect battery install ICl reconnect power reconnect DVM across test resistor Rx observe meter reading about 23 34 volts RADIO SOUTH INC PRO-DRIVER Contains 4 1300 mah battery cells senses plug fouled & boosts power LED bar garaph meter display plug condition Supports Futaba J chargers Sale Price $5300 I7 PRO-DRIVER MARK II auto shut down Sale Price $5800 3702 N Pace Pensacola FL 32505 Toll Free Order Line Orders Only Please 800-962-7802 Repair Informatien 850-434-0909 visit website http//www wtp net/OBEST/radioseuth/RS1 html PRO-HINGES Easiest Hinge Install use cyanocrylate adhesives nO- $24g/pkg 18 Scale $279/pkg 24 available local hobby shop order direct DEALER INQUIRIES INVITED 2 38 Model Aviation gy Management Tools Introdudng new generation 12-volt DC input delta peak field chargers Hitec RCD CG-330 Features CG-335 offers features CG-330 Also just fun 1015 gas theAKROisaBLASTi havent experienced Speed 400 flying until youve flown new STEPHENS AKRO AKRO blast fly has full aerobatic capabilities can take-offs landings less fifty feet full-house setup skies limit AKRO AKRO kit comes complete 3-piece epoxy fiberglass fuselage foam core wings aluminum landing gear struts wheel pants clear canopy complete hardware package full-size plans instructions Order AKRO today have blast AKRO KIT #101 28 fact reading should step between approximate levels indicating operation function generator patient observation Cycle Speed should very slow about 20 seconds Reconnect DVM leads pc board DVM positive ICib pin 1 accessible right SWi battery connected should see DVM tracking slowly smoothly varying voltage about 8 volt about 2 volts Sometimes numbers may hard catch fly since some meters have slow response Move DVM positive back Qi collector R9 wire watch reading alternate slow rate between O about 28 volts get results carefully recheck assembly above OK disconnect battery remove temporary 100 ohm resistor youre done Because Radio Shack pots electrical rotation does line up exactly mechanical rotation its necessary find electrical center Pulse Width control R17 temporarily disconnecting wires two used pot terminals measure total outside terminal outside terminal resistance DMM set Ohms example R17 read 469 Ohms reasonable tolerance 50K pot Divide number two -235K Connect ohmmeter outside terminal center wiper terminal rotate pot shaft calculated value pot now electrical center Without moving justset shaft position loosen adjust knob pointer position center itthus indicating neutral future servo testing Resolder loosened pot wire mount pc board assembly panel Select known good servo use radio system establish define its neutral output arm position suggest using aileron elevator channel sure stick trims centered servo its neutral output arm position will used transfer standard calibrate Cycler Connect servo Cycler output lead connect battery Pulse Width knob positioned above adjust trimmer R20 necessary bring servo arm its established neutral position Move Pulse Width control knob over range observe corresponding servo movement available range motion should actually exceed what occurs full stick trim travel transmitter Reset PW control knob mid position servo neutral Adjust Cycle Width knob CW about halfway observe slow smooth sweep servo about position set above Switch SWI square wave side observe stepped -bang-bang movement servo Again patient 40 Model Aviation 4Dealer inquiries invited 9300 Yvette Marie NW PO Box 66527 Albuqterque NM 871 93-6527 Order 505 890-7549 Website wwwkamodels corn SIERActual Meister Scale F4U corsair Bunt John West takes Now can vary Cycle Speed Width controls wish make servo dance caution Cycler capable about cycle per second back forth drive servo very fast Under conditions servo current can get quite high moving rapid backand-forth manner servo actually conditions worse stall can quite hard servo amplifier can cause overheating failure operate servo few seconds highest sweep speed Lower rate cycling normal transmitter stick motion no concern may have built Pulse Mini-Lab have other measurement options careful calibration Servo Cycler can made Trimmer RIS can set closely exact transmitter frame rate critical servos important certain electronic speed controls ESCs used Electric flight Its positively awesome control ESC Cycler watch E-power system slew back forth over power range itself can also set R20 carefully symmetrical control range PW controlbut like things nearly perfect Incidentals Servo Cycler will work perfectly four- five-cell receiver packs will actually work below about 45 volts battery needs charged anyway R13 can made up two resistors shown assembly drawing parts list will negate necessity special order particular value recommended Radio Shack plastic box has internal bosses base have interference fit simply drill em off 3/ bit taking care go through box bottom have variety radio brands can install set input output leads did Another option use example Deans input output connectors use Deans-towhatever adaptors get different servo connector types Aside observing anomalous servo arm behavior can also listen servo sound funnies holding servo ear Cycler smoothly sweeping have used Cycler eight different servo brands/model types some ESCs well work just fine hope find Cycler liking helpful have welcome question comment about its design application Please enclose SASE correspondence youd like reply Kopski 25 West End Dr Lansdale PA 19446 42 Model Aviation 4Your SCALE HEADQUARTERS 1 AhIE hA CAIE AAflflI flhIJ TEIP AY WAY Balsa/Ply Construction Fiberglass & Plastic Accessories Plans Partial Full Kits Available Engineered Lazy Builders Custom Retracts Vinyl Decal Sets Available tor Designs Custom Building Service Available SEND IN FOR FREE CATALOG ItK SCALE 163vnwf49 NENC 2