Technical, Techniques, Hints, and Tips > Radio Equipment

Question on Servos

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BobF:
Hi,

I once had the same problem (servos that is)

I always check gear before going to the pond, as I can't quite get the whole workshop in the back of my car.
On arriving, I turned on and nothing worked. I checked all connections and batteries but still nothing.
This was using a bec system and electronic speed control.
I swapped to a new receiver and also connected a new servo. Dead, so I replaced the ESP, still dead.

I finally spotted the problem had been caused by the servo reverse being knocked on the throttle side of the transmitter on the way to the pond, and it was exactly half way between settings. Once it had been set to the up position again, everything worked.? The ESP was not able to set as it was not getting a signal, so no power back to the receiver. So simple, but so hard to spot.
Bit like me really being thick and small.

Bob

dpbarry:
Glad to see there are better mortal than me who can make mistakes.  As you say Bob, its the one's smacking you about the gob that appear to be the most difficult to get the brain to register on.  :P

Declan

cbr900:
Declan,

One thing you do have to watch out for is that some servo's have the positive and negative wires reversed so always check that those two wires are in the same position, it can cause a lot of replacment parts bing required, as a mate found out...


Roy

dpbarry:

--- Quote from: cbr900 on July 21, 2006, 04:54:03 am ---Declan,

One thing you do have to watch out for is that some servo's have the positive and negative wires reversed so always check that those two wires are in the same position, it can cause a lot of replacment parts bing required, as a mate found out...


Roy

--- End quote ---

Cheers Roy.

Yes, I watched out for that one. As you can see, it was my own stupitidy in the end.

Declan

Fast Electricals:
I had a similar problem the other day. My ESC is fitted with a safety device which will only "arm" the unit if the throttle stick is in the neutral position. The throttle trim lever had been knocked in transit and the motor would not run. After much head scratching, I finally worked it out.

Neil ???

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