Re: [CAD_CAM_EDM_DRO] Re: ...power...

>The voltage rating on a step motor simply means if you apply 3VDC
>across that motor's coil, 4 amps of current will flow. In other words
>it has 0.75 ohms resistance.

Oops! I think I was being too subtle.

The original post was in reference to the current required from a power
supply.

No need for a 10amp 60 volt supply--that's 600W, enough to heat
a small room.

If three motors draw 10A max. at 3V, then one would either need
a 3V 10A supply (not-recommended, low high-speed torque)

OR

a 60V supply (20 times the voltage) at 0.5 A (1/20th the current)

A supply that delivers 60V at 10A is overkill.
(I think 60V at 2A would provide a reasonable power margin.)

>> 10A x 60 V = 600W or 200W per motor.
>> 200W / 3V = 66.6 A per motor.
>>
>> Uh-oh, somethings not right!