It may may mans Photo Essay LF Randolph WE ALL have servo jit tery side wont center should relegate throttle duty Sooner later servos become throttle servos something must done about some thing usual cause jittery servo dirt feedback pot easy malady cure feedback pot p0 tentiometer very similar volume control TV stereo vari able resistor connected outknoj~ world should -- put arm servo device under output arm subject tells arm has moved dirt grease engine exhaust enough correspond movement fingers gets dirty the stick transmitter right servo gets jitters Briefly clean2 what inside servoslike. je motor bottom circuit ooara ana Its warn paoaing over inc pot 3 vYrlell tne circuit board moved away pot element screws hold its housing June1979 47 4 The markjust above screw driver used align element back its housing after cleaned lubed 5 0-Tip dipped alcohol used clean inside element contact center should also hn IannarI 6 A light cost lubricant applied clean element before returned its housing 7 element returned its housing alignment marks matched See text re-centering output arm found necessary 8 Everything goes back case foam between pot circuit board grommet top protects leads case 9 In EK SM servo circuit board held place stand-offs two screws 48 Model Aviation ing procedure open servo case dean pot reassemble servo difficult job saves lot down time well money photos show Kraft KPS-15 servo servos similar inside some differences mount ing circuit board Some servos have feedback pots plastic elements need lubrication after clean ing check manual Pot lubricant available Ace Radio hob shop first step open servo case Some servos open top some side bottom necessary remove output arm disturb gear train Once case open inside will look like picture No 2 will motor some foam wires cir wit board right under circuit board potit held its housing two screws Lift circuit board out way some servos held place two standoffs felt tip pen mark pot element its housing picture 4 loosen screws lift out necessary re move wires Dampen swab alcohol dean element picture 5 dont miss center contact alco hol dry apply THIN coating lub ricant return its housing using marks alignment tighten screws Plug servo receiver turn transmitter center trim leavers receiver turned output arm should center loosen screws twist element its housing slightly way other until arm centered tighten screws Turn off equipment disconnect servo receiver case open check frayed wires loose con nections Replace circuit board foam over pot its stand offs close case servo should function new still service man. t Center Installed Randys Stitchin future MA subjectafter maintenance set Ace Commander servos Note plas tic tubing over screws vicinity cable leads protection points Right Installed aircraft Randy appears have used three different kinds pushrod connections ser vos have wrestled engine control note simplicity 10 Royal Ace etc servos open side otherwise inside similar others Although physical appearance similar servos difference electronics
Edition: Model Aviation - 1979/06
Page Numbers: 47, 48, 49
It may may mans Photo Essay LF Randolph WE ALL have servo jit tery side wont center should relegate throttle duty Sooner later servos become throttle servos something must done about some thing usual cause jittery servo dirt feedback pot easy malady cure feedback pot p0 tentiometer very similar volume control TV stereo vari able resistor connected outknoj~ world should -- put arm servo device under output arm subject tells arm has moved dirt grease engine exhaust enough correspond movement fingers gets dirty the stick transmitter right servo gets jitters Briefly clean2 what inside servoslike. je motor bottom circuit ooara ana Its warn paoaing over inc pot 3 vYrlell tne circuit board moved away pot element screws hold its housing June1979 47 4 The markjust above screw driver used align element back its housing after cleaned lubed 5 0-Tip dipped alcohol used clean inside element contact center should also hn IannarI 6 A light cost lubricant applied clean element before returned its housing 7 element returned its housing alignment marks matched See text re-centering output arm found necessary 8 Everything goes back case foam between pot circuit board grommet top protects leads case 9 In EK SM servo circuit board held place stand-offs two screws 48 Model Aviation ing procedure open servo case dean pot reassemble servo difficult job saves lot down time well money photos show Kraft KPS-15 servo servos similar inside some differences mount ing circuit board Some servos have feedback pots plastic elements need lubrication after clean ing check manual Pot lubricant available Ace Radio hob shop first step open servo case Some servos open top some side bottom necessary remove output arm disturb gear train Once case open inside will look like picture No 2 will motor some foam wires cir wit board right under circuit board potit held its housing two screws Lift circuit board out way some servos held place two standoffs felt tip pen mark pot element its housing picture 4 loosen screws lift out necessary re move wires Dampen swab alcohol dean element picture 5 dont miss center contact alco hol dry apply THIN coating lub ricant return its housing using marks alignment tighten screws Plug servo receiver turn transmitter center trim leavers receiver turned output arm should center loosen screws twist element its housing slightly way other until arm centered tighten screws Turn off equipment disconnect servo receiver case open check frayed wires loose con nections Replace circuit board foam over pot its stand offs close case servo should function new still service man. t Center Installed Randys Stitchin future MA subjectafter maintenance set Ace Commander servos Note plas tic tubing over screws vicinity cable leads protection points Right Installed aircraft Randy appears have used three different kinds pushrod connections ser vos have wrestled engine control note simplicity 10 Royal Ace etc servos open side otherwise inside similar others Although physical appearance similar servos difference electronics
Edition: Model Aviation - 1979/06
Page Numbers: 47, 48, 49
It may may mans Photo Essay LF Randolph WE ALL have servo jit tery side wont center should relegate throttle duty Sooner later servos become throttle servos something must done about some thing usual cause jittery servo dirt feedback pot easy malady cure feedback pot p0 tentiometer very similar volume control TV stereo vari able resistor connected outknoj~ world should -- put arm servo device under output arm subject tells arm has moved dirt grease engine exhaust enough correspond movement fingers gets dirty the stick transmitter right servo gets jitters Briefly clean2 what inside servoslike. je motor bottom circuit ooara ana Its warn paoaing over inc pot 3 vYrlell tne circuit board moved away pot element screws hold its housing June1979 47 4 The markjust above screw driver used align element back its housing after cleaned lubed 5 0-Tip dipped alcohol used clean inside element contact center should also hn IannarI 6 A light cost lubricant applied clean element before returned its housing 7 element returned its housing alignment marks matched See text re-centering output arm found necessary 8 Everything goes back case foam between pot circuit board grommet top protects leads case 9 In EK SM servo circuit board held place stand-offs two screws 48 Model Aviation ing procedure open servo case dean pot reassemble servo difficult job saves lot down time well money photos show Kraft KPS-15 servo servos similar inside some differences mount ing circuit board Some servos have feedback pots plastic elements need lubrication after clean ing check manual Pot lubricant available Ace Radio hob shop first step open servo case Some servos open top some side bottom necessary remove output arm disturb gear train Once case open inside will look like picture No 2 will motor some foam wires cir wit board right under circuit board potit held its housing two screws Lift circuit board out way some servos held place two standoffs felt tip pen mark pot element its housing picture 4 loosen screws lift out necessary re move wires Dampen swab alcohol dean element picture 5 dont miss center contact alco hol dry apply THIN coating lub ricant return its housing using marks alignment tighten screws Plug servo receiver turn transmitter center trim leavers receiver turned output arm should center loosen screws twist element its housing slightly way other until arm centered tighten screws Turn off equipment disconnect servo receiver case open check frayed wires loose con nections Replace circuit board foam over pot its stand offs close case servo should function new still service man. t Center Installed Randys Stitchin future MA subjectafter maintenance set Ace Commander servos Note plas tic tubing over screws vicinity cable leads protection points Right Installed aircraft Randy appears have used three different kinds pushrod connections ser vos have wrestled engine control note simplicity 10 Royal Ace etc servos open side otherwise inside similar others Although physical appearance similar servos difference electronics