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Post by zig on Feb 24, 2021 14:59:59 GMT 1
possible to test a F2 PV Servo for fault ?
be interested if someone has done this before as to what to do so as i can rule out a faulty Servo on my build
ZiG
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Post by bare on Feb 25, 2021 4:47:53 GMT 1
Easy to when connected to a known good/working Servo controller :-) Just turn the ign key and listen.
Far more difficult/impossible ? for the typ shed habitue.. without a control unit.
However the things are a robust motor a beefy gearset and a feedback pot (which is some rascal to replacement source by the way)
By my knowledge Servos live V long... rarely failing.. But?
One can (or at least could.. I did) buy a near new takeoff (twits think the EXUP system robs hp.. it doesn't.
But fools and motos are a perennial combo) 2005? 4 cyl something or other Yamaha.. EXUP servo.
Same! part as ours only with a slightly different /updated connector plug.
I paid 5$ for mine off'n Fleabay of all places.
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Post by zig on Feb 25, 2021 10:19:15 GMT 1
Easy to when connected to a known good/working Servo controller :-) Just turn the ign key and listen. Far more difficult/impossible ? for the typ shed habitue.. without a control unit. However the things are a robust motor a beefy gearset and a feedback pot (which is some rascal to replacement source by the way) By my knowledge Servos live V long... rarely failing.. But? One can (or at least could.. I did) buy a near new takeoff (twits think the EXUP system robs hp.. it doesn't. But fools and motos are a perennial combo) 2005? 4 cyl something or other Yamaha.. EXUP servo. Same! part as ours only with a slightly different /updated connector plug. I paid 5$ for mine off'n Fleabay of all places. cheers for the info , but if running a amp meter across the servo is there any specific reading's i should be getting from block connector/wiring resistance and so forth ? done this before? ZiG |
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Post by marrcel on Feb 25, 2021 19:09:17 GMT 1
And amp meter you place it in series not across😤
Just measure the voltage across the servo at the moment it spins. It must be higher than 11V. Lower than 9V it spins to slow
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Post by zig on Feb 25, 2021 19:24:18 GMT 1
And amp meter you place it in series not across😤 Just measure the voltage across the servo at the moment it spins. It must be higher than 11V. Lower than 9V it spins to slow Thank you Marrcel for the information much appreciated ZiG |
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Post by abar121 on Feb 26, 2021 14:46:49 GMT 1
The Haynes manual has some resistance figures to check the resistor in the servo unit.
I have some problems with the 31k I have. It tried to do the clean cycle after being idle for I guess a long time, but struggled.
So I took off the cables, lubed them up and now the motor does nothing when plugged in. A bit bizzare.
So I disconnected the servo and tested direct to power and it spins fine. Two of the three resistance test come out at 7.5 Ohm, one is just a couple. Not sure if that is the problem or the controller.
I have another controller and servo to try when I have a moment.
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Post by zig on Feb 26, 2021 15:12:57 GMT 1
The Haynes manual has some resistance figures to check the resistor in the servo unit. I have some problems with the 31k I have. It tried to do the clean cycle after being idle for I guess a long time, but struggled. So I took off the cables, lubed them up and now the motor does nothing when plugged in. A bit bizzare. So I disconnected the servo and tested direct to power and it spins fine. Two of the three resistance test come out at 7.5 Ohm, one is just a couple. Not sure if that is the problem or the controller. I have another controller and servo to try when I have a moment. let me know out of curiousity what figure's you get when you test the 2nd servo i think everyone on here would benefit from the figures , great to know ZiG |
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Post by marrcel on Feb 26, 2021 17:58:28 GMT 1
You can measure the potmeter separately. This is the first to go kaput.
The carbon strip wears. When measure the resistance and reading spikes, it is toasted.
But it is replaceable.
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Post by zig on Feb 26, 2021 20:43:50 GMT 1
You can measure the potmeter separately. This is the first to go kaput. The carbon strip wears. When measure the resistance and reading spikes, it is toasted. But it is replaceable. also good to know , thanks for that..... ZiG |
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Post by abar121 on Feb 26, 2021 21:51:31 GMT 1
You can measure the potmeter separately. This is the first to go kaput. The carbon strip wears. When measure the resistance and reading spikes, it is toasted. But it is replaceable. Are there any guides to replacing it? |
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Post by marrcel on Feb 26, 2021 22:53:19 GMT 1
The servo is easier than lego. 😉
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Post by abar121 on Feb 27, 2021 9:01:27 GMT 1
Sure. What replacement pot should I use?
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Post by marrcel on Feb 27, 2021 21:50:42 GMT 1
I can’t remember. 5kOhm?
Just take it out and measure the two outer leads. The middle is the runner which is fulnerable
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Post by bare on Mar 1, 2021 2:09:18 GMT 1
Good luck with the Pot. It's Yamaha proprietary as I recall.. correctly?..
the Carbon track isn't linear , or something like that.
I simply Bought a fresh Yama EXUP Servo for almost no coin.
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Post by abar121 on Mar 1, 2021 10:25:14 GMT 1
An FZ1 or another?
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