Stepper motor controller limits

[rockc]

Is there a stepper motor controller out there that has its own limit memory?
I would like to have the motor limit after a certain # of rotations in pulse mode in both directions and limit again at home. The gears I am driving cannot go beyond a certain point in either direction without damage and I need to be able to pulse in both directions as needed. I don't have enough physical room to install limit switches.

I have been online searching all day for one.

Thanks

 

[Nigel Goodwin]

Unless you've some way of determining the exact position of the stepper, how do you know where it is?. It's no problem at all limiting the number of steps it travels, just a question of programming the micro-controller to do it - but you must be able to start from a guaranteed known point.

 

[Mr RB]

You could try the new "digital" servos from Hitec, they can do some fancy tricks but are quite expensive, as are their controllers.