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Author Topic: servos  (Read 957 times)

regiment

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servos
« on: February 05, 2013, 01:31:51 PM »

  what causes servos to judder and a sail arm going round and round instead of side to side
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malcolmfrary

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Re: servos
« Reply #1 on: February 05, 2013, 01:52:32 PM »

A bad battery, or a poor connection between the battery and the insides of the servo, or both.  Or a fault inside the device.  Or all three.
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Martin [Admin]

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Re: servos
« Reply #2 on: February 05, 2013, 05:34:16 PM »


metal to metal joints or contact points won't help either!

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Netleyned

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Re: servos
« Reply #3 on: February 05, 2013, 06:10:05 PM »

Going round and round?
No feedback and no stops
Or it is sail winch.

Bed
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regiment

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Re: servos
« Reply #4 on: February 05, 2013, 07:09:01 PM »

  sorry one of them is a sail winch. was ok the other day but today acting up  thanks
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Martin [Admin]

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Re: servos
« Reply #5 on: February 05, 2013, 08:27:42 PM »


Test them one at a time, unplug the rest.
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andrewh

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Re: servos
« Reply #6 on: February 06, 2013, 11:47:01 AM »

Hi, Regiment
 
Suggest you start with the absolute basics
 - are the receiver batteries working?  Try a pack of four ordinary alkaline cells to give the Rx plenty of voltage
-try plugging the receiver into the battery without the transmitter on (NEVER do this normally!) are the servos twiching then?
if one servo twitches whatever the radio is doing (Transmitter on or off) then its probably a servo with faulty/dirty/wet potentiometer.  Check by substituting another servo.  If this works fine you had a servo problem
Or try swapping the servo plugs in the receiver and see if that swaps the jitter over
 
Servos with faulty/dirty/wet pots can be repaired/fixed but with the cost of servos where it is now not many people would bother to do that?
 
The basic thing you are seeing is that the servos don't or can't obey the radio position signal.  if both servos are twitching or moving then the radio is (probably) the problem - check batteries in both transmitter and receiver.  If only one servo is doing it try changing them over as above or try another good, dry servo
hope this helps a bit
andrew
 
 
 
 
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regiment

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Re: servos
« Reply #7 on: February 06, 2013, 01:28:54 PM »

  thanks to all how answerd it was a bad battery showed charged  on my old tester but when my friend put it on his  expensive  one showed a duff battery changed battery all is working  so if we do not get any more 70 mph i will be on the lake after i have fixed the shed roof
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