Question about current limit

[rashdan]

hi,
I want to build current limit for stepper motor driver using comparator, and i have some question :
Should I use flip flop with outbot of comparator?
What is the frequency that comes out of the comparator?
What should I do if the frequency of the pc (step signals) higher than the frequency of the comparator?

thanks

[hgk]

Here's some information about limiting stepper motor current by using a sense resistor voltage and the pic reference voltage, with an internal pic comparator, to turn the output off and on when limiting.

Look near bottom of page for chopper current limiting.

Limit Current to Boost Stepper-Motor Torque | Machine Design

gk

[rashdan]

hi
I want to use lm339. any information about this?
i want to limit current for 5 amp stepper motor and my power supply 24v 30amp
thanks