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From: nahshon@dan.haifa.ibm.com (Itai Nahshon)
Subject: Re: How to reverse a servo ?
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In-Reply-To: wardml@picard.cig.mot.com's message of 29 Sep 1994 21:56:53 GMT
Date: Fri, 30 Sep 1994 15:11:43 GMT
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In article <36fd75$4pa@delphinium.cig.mot.com> wardml@picard.cig.mot.com (Matthew L. Ward) writes:

>Simple question.  How does on reverse a Futaba servo ?

>mlw

You have to reverse both the motor and the potentiometer leads.

It would be much easier to reverse the control input. All modern
radios have "reverse" switches for all channels. In the past you
could have one of 3 solutions:
a. Live with the servo as-is. Design your model with the servo
   direction in mind.
b. Some companies had "reversed" servos. I guess these are
   no longer available.
c. Use a gadget between the receiver and radio that reverses
   the servo. I think a single 4538 (Motorola MC14538) with 2
   resistors, 3 capacitors and a trimmer pot. can do the job.
d. Modify the servo. This is the most difficult and least desired
   solution. Impossible if the motor is soldered directly to the
   PCB (I've seen this in some servos).

Itai nahshon,
Haifa, Israel
nahshon@vnet.ibm.com
