Re: Focuser for MaxEsp3

George Cushing

Remember that if you use the #define AXIS4_DRIVER_POWER_DOWN       ON option the motor is getting continuous power. 

I have found that the DVR8825 will run Vixen MT1 drives (PF42-48) hot unless I set them to 0.03A. The PF42s are 6 wire steppers and they have no current rating. So using the DMM and Ohm's Law (Voltage (V)/ Resistance (R) = Current (I)), where V=12 and R=200Ω we find that The PF42s max current is 0.06A and half of that is 0.03A.

Driving the PF42s by half coil (100Ω) doubles the current needed to 0.06A. They still run warm to the touch but not hot.

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