PWM/HPWM Stepper Motor Controller

[HenrikOlsson]

Yes, exactly so :-)
That's sort of the idea behind the stepper motor - that you can relatively precisely control both the speed and the position without needing some sort of feedback device and "complicated" control algorithms. For that reason steppers have been and are being used in a LOT of mechatronic devices like printers, robots, machining equipment, optical stages, light effects, throttle valves in cars and many many other things.

[DavyJones]

Yes, exactly so :-)

Henrik thank you I thought so. By the way if anyone is interested I got the power supply and dual dc/dc converter and they work beautifully. I have 24v for the stepper, 12v for the solenoids and 5v for my main board.

Power Supply
Tunable dc/dc converter

[DavyJones]

Argh... RTFDS! David haha the 12F683 that I have been testing with has PWM in it whats wrong with me. I do have some 16F pics coming to give me more input/output which I know I will need

[DavyJones]

I have not had a chance to work with the HPWM pulsing but I should soon. The past week I have been concentrating on getting the frame together for my small conveyor. Now that I have a more adequate testing apparatus I'll start to work on the HPWM piece of my code. I did order a couple 16F's to work with since I am going to need a few more input/outputs than I originally thought. I made the conveyor belt from window screen so as I pass my parts under the spray the liquid will pass through into a drip pan I plan to mount underneath. I through a hand full of whatever was light and closest to me for my video to show the belt actually moving under the stepper motor control. For now just for demonstration purposes I hard coded the program to move the belt very slow. The belt slips a couple times in the video and I adjusted the rollers so there is no more slippage. I'm probably going to rubber coat the rollers or maybe cut an old bicycle tire up and slip it on the rollers to give more of a rubber grip to the belt. I know we are not talking a lot of picbasic here yet but picbasic is going to do a lot more with this project so there will be more to come just thought folks might want to see this in action.

[mark_s]

Your frame looks great.

What are your rollers made of PVC pipe?

[DavyJones]

Your frame looks great.

What are your rollers made of PVC pipe?

Mark, Thanks... yep they are just PVC pipe with end caps and a flange for 3/8" aluminum rod/axle. You can email me if you want some specifics on the parts I used.
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