bogstandard

Can anyone help, I am trying to find a method of reversing a servo without resorting to putting something in the line.
What I am trying to achieve is two servos on a Y-lead and they need to operate in opposite directions.
I have no problems soldering inside a servo, I just need to know which bits of electric string need swapping over.

Bunkerbarge

Depending on whose servo's you have the signal lead is either the black or brown wire and the other two are the motor wires. Cut the other two and change them over.

Have you exhausted all possibilities though of arranging the servo arms to work the way you want them to, or mounting one upside down etc.?

__________________

“Dirty British coaster with a salt-caked smoke stack, Butting through the Channel in the mad March days"

bogstandard

Bunkerbarge,
There is only one way to set servos.
Do you mean swap over the + and - to motor inside the servo or the servo leads themselves.
Sorry about being so stupid but my brain hurts.

Bunkerbarge

The cable from the plug to the servo that you plug into your receiver is a three core cable. They can be black, red and white or brown, orange and red or maybe even differrent colours but one is always the signal to the servo and the other two are the power to the servo motor. If you cut the power cables, bare them and reconnect then the other way round you will reverse the operation of the motor in the servo. If you use a soldering iron and a bit of heat shrink over the cores you should get a neat enough job.

__________________

“Dirty British coaster with a salt-caked smoke stack, Butting through the Channel in the mad March days"

wonwinglo

Have I missed the point here ? what is wrong with servo reversers on the TX ? failing that just turn the servo around the other way so the arm pulls instead of pushes.

__________________
'And there I was oil on my goggles from a broken pipe,then I looked at the altimeter,all I could see was the makers name !'
www.wonwinglo.scale-models.net/

Bunkerbarge

Barry we are using a "Y" splitter and only want one of the servo's to reverse.

I did ask if all orientation options had been considered.

__________________

“Dirty British coaster with a salt-caked smoke stack, Butting through the Channel in the mad March days"

bogstandard

Many thanks for your replies, I will just take the leads out of the plug and swap them over. The reason I asked is because usually things are a little more complicated than that.

bogstandard

Bunkerbarge
Your system of swapping over the power leads didn't work, the servo just refused to work.
I eventually stripped a servo down, swapped the + & - to the motor and swapped over the two outside leads of the internal pot, and voila, a servo running in reverse.
Thanks anyway for your help.

Bunkerbarge

Difficult to know which wires but probably swapping them at the motor is better anyway.

Glad you got there in the end.

__________________

“Dirty British coaster with a salt-caked smoke stack, Butting through the Channel in the mad March days"

Bluewavestudios

Just a thought,
Ok connect both servos up via a Y lead but mount the servos head to toe so to speak and do the connections on the servo output arms accordingly..surely this will give the required outputs without having to rewire anything...??

I hope you can visualise what I mean...it is the easiest way of solving this problem purely by way of mounting the servos.

I have included a rough Diagram as an example, so you so can get an idea of where the pushrods should go etc...and the servo orientation (Mounted head to toe so to speak)...almost back to the days of V tail mixing long before mechanical mixers and computerised mixers were available...and that worked too !!!

Regards....Mark.

Attached Images

servo.JPG (8.3 KB, 6 views)

__________________
I'm Only Here Coz I'm Not All There !!!