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Other › Anybody had HS56 servo skip a tooth?
10-14-2005 01:03 AM  12 years agoPost 1
steph280

rrElite Veteran

Irvine, California

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And I don't mean stripped gear from crash damage. I powered up my Rex the other day, only to see the swash tilted to one side. further examination revealed one of the servo horn is no longer 90 degrees perpendicular at 0 pitch like how I originally setup. No I didn't smoke or drink anything prior.

Took the servo out, rotated the horn by hand, and noticed the left/right travel is no longer symmetrical. Then I disassembled the servo expecting to see stripped gear, nope, everything was fine.

So I guess the gear simply skipped a tooth. Makes me worry to use this servo again in the heli.

Has this happened to anybody before?

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10-14-2005 01:29 AM  12 years agoPost 2
GoRgOyL

rrNovice

Fresno, CA

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That's weird, even if it did skip a gear, the outdrive gear should still center properly. Maybe you have a bad potentiometer?

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10-14-2005 01:58 AM  12 years agoPost 3
Gary Hoorn

rrKey Veteran

Annapolis Maryland USA

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steph280,
Sounds like either the shaft on the pot is slipping or the element of the pot is failing. If that servo came across my bench for service I would replace the pot, check the gears and run it on the servo tester for about 20 minutes. If it still does not center properly the circuit board is bad. These are not likely to be parts you have at hand unless you are in the business of radio servicing. Install a new servo and send that one to Hitec service. Lots less expensive than rebuilding after a crash.
Gary

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10-14-2005 02:24 AM  12 years agoPost 4
debogus

rrApprentice

Beauklahoma,peoples republic of mexifornia,USSA

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Ive had micro servos wear to the point of skipping, sucks.
Much better to find out after a day of flying , than during.

Dave

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10-14-2005 10:57 PM  12 years agoPost 5
steph280

rrElite Veteran

Irvine, California

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Thanks for the responses.

But the servo centers every time at the same location, just that it's always few degrees off from where it was setup originally.

I have already swapped the servo out. Don't want to risk the Rex giving me an unwanted haircut.

Thanks again.

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