Microstepping Stepper Motors

[Gypo]

Hi

Is there any plans to add a microstepping component for stepper motors?
I have a project that needs it and have blown up a few dedicated motor controllers and drivers trying to get microstepping working.

If anyone has any experience of doing this that can help I would be most appreciative it's getting expensive and short of time to have something working...

Many Thanks
Gypo

[Steve001]

hi have you had a look at this ?

http://www.allegromicro.com/en/Products ... A4975.aspx

steve

[Steve001]

example circuit found here

http://www.dz863.com/circuits-9-8387012 ... Schematic/

steve

[Gypo]

Steve

Thanks for the replies and links,

Have you actually made use of any of the stepper motor chips?
I have one of the Allegros chips (A3972SB Farnell 145-7114) that I am going to try and expect to have others soon.
I have a few other makes of motor control/driver chips that don't seem easy to get going.

I have tried some chips & circuits including a few from Microchips site but none seem to work and I don't have the facilities to find out why.
The microchip site talks round the subject and doesn't give working examples.

I was after a simple way to microstep a stepper motor (in fact there will be 500+ motors) I had hoped I'd only need to use direction and step commands. I have to do a lot more other work for this and thought the motor side of things would be quick and easy (which I think it would be if I didn't need to microstep) but the motor driving is taking all my time and I don't seem to be getting anywhere.

Thanks again
Gypo

[Steve001]

Hello Gypo,

sorry no i have not used one of those drivers - dont forget that that you need at least two.

steve

[Benj]

Hello,

The are micro stepping drivers on my reprap controller PCB I'll have a look for the part number.

This page from the Reprap wiki looks quite good.

http://reprap.org/wiki/Stepper_motor_dr ... iver_chips