Hello everyone,
I'm building a cnc machine and have STK672-080 based drives ( PEAK 3.5amp and 3amp with heat-sink @ 45volts). I have gone through the forum and found various tips, documents, links.My favorite sites are
CNC Router Source: The Ultimate Information Resource
Stepper Motors
Support
Power Supply Tips
Now, from the above sites i was able to get most of the info, but i'm still stuck at the power supply amp rating and i need some clarification regarding the amperage values used in the formulas ? is it per phase current or 2-phase current value when one talks about motor current and does Bi-polar/Uni-polar motors have an effect on amp selection ?
example: suppose one is using single unipolar stepper motor rated at 3 amps per phase current and needs to find the power supply amp rating
will it be 2/3 or 1/3 or 0.7 time the motor current and will it be per phase current or 2 phase current = 3*2/3 or 3*2*2/3 or 3*2*.7 or 3*0.7 ?
sorry if this has been asked already, i could not under stand which one is correct ?
Thanks
Sahill