Pics:
The Box
The Whole System
Female Motor Connector
The Controller
Now onto the problem. The motors are great, and definitely worth the price. It also came with a motor controller though. This controller has 8 55V 110A IRFP064N HEXFET's. The only thing is that I have no idea how I would go about using this controller. Here is a Rundown:
H8/532 Main IC
4 IR2110S IC's
2 GPS 35DAA010AKG ?
14 pin controller port
Any help would be appreciated in this matter. Not to mention that it would shave ~$300 off of the cost of this project. Thank You!
5 comments:
In case you're not aware, that's actually the base to a Quickie P200 power wheelchair. There is a compatible joystick with a (probably identical) controller on Ebay for $169. You can probably find just the joystick for less.
The reason I suggest that you get the joystick is so that you can break out a functioning input signal for the controller, and potentially spoof it.
The motor controller has built in acceleration, speed, deceleration, and current limits, among other things. You'll probably have the best luck in your project by increasing the limits on many of these things and using your control algorithm to turn the gain back down appropriately.
I was hoping someone would recognize the motor assembly. I agree spoofing the joystick would be a straightforward way to go. The built-in accel-speed-decel-etc of the controller engineered for your motors is a BIG plus!
The alternative of using another controller with data is good if you can find example circuits and projects to work from.
I aree with the other comments
reverse engineering
I considered this, but by the time I bought the joystick and spent the time reverse engineering, I might as well have just bought a commercial controller. It could also end up with some crazy serial protocol or non-proportional control, which would be useless.
Another thing to consider is that the used motors may have significantly more backlash than Trevor Blackwell experienced. It's been my experience with these motors that their backlash increases greatly with heavy use in a wheelchair.
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