@ Danger I use a wheechair base for my Robot controlled by two servos which simply move the joystick Initially I took unit apart and attempted to make a direct connection but decided to keep it simple

Reason 1 The originall controll unit is probably one of the most advanced motor control units,why discard it ? 2 So simple to programme when connected to Ezb

very happy with results Pat

Thanks Jstarne. I guess that it pays to shop around. I wanted to keep the regenerative braking function of the wheelchair, but now I see that some motor controllers have that feature too. The more that I think about hooking servos to the joystick, the more complicated it seems. Two servos (one for forward and back, one for left and right) is not really compatable with most H-bridge applications from what I can see.

Hey Pat, do you have any pics of how you set that up? I want to do the same thing with my bot.

Pat, I did not see your post until after I posted my last message. Any advice that you can give me on setting that up would be appreciated.

Those controllers support breaking , they connect directly to ezb and supports 24volts that most wheelchair motors use , some use 12v . Don't bother with the joystick thing , just the cost of wire and and two heavy duty servos you might as well get one of these 45 amp or 68amp controllers and have a simple direct interface.

Photo of servos that drive the wheelchair joystick

it may be difficult to see how it works but it involves no modifications except extend the shaft of the joystick itself

Both servos are placed 90 deg apart on the same level ,both are mounted on a small cabinet hinge as they move with the joystick movement.

Take a look if you need further info please let me know

Pat

Oh I FORGOT Best part of All Have great fun with Wheelchair base

Simply connect a two channell radio reciever to the two servos , add a 2 channel radio transmitter and you have one powerfull radio controlled Bot.

Zoooooom !!! Zooooom!!!

Pat

:P