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You are here: Home / Replies / Thanks for your input.  The

Thanks for your input.  The

|

Electronics › Electronics › Driving stepper motors › Thanks for your input.  The

July 23, 2014 at 2:39 pm #11929
Robert Coe
Participant

Thanks for your input.  The easy driver uses a stepper driver chip that has all the logic and drivers built in.

All it requires is input for step size, direction and a step pulse.

 

I’ve solved the ramping of step pulses by adding an RC circuit and a transistor between the timming resistors R1 of the astable 555 and Vcc, as the capacitor charges the transistor slowly turns on effectively ramping the frequency of the step pulses.

I bread boarded the circuit and it work perfectly. The stepper motor slowly ramped speed, to the preset speed, set by R1, of the astable circuit without locking into resonsnce.

 

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