Re: [CAD_CAM_EDM_DRO] volts?

"W. Dale Smith" wrote:

> A few days ago, someone said something like... "since we commonly use voltages 5 or 10 times..."
>
> Does this mean I really don't need to worry about finding a 4.5 VDC power supply 'cause that's what's printed on the motor?
>
> All of the posts I have found seem to skip around this subject... maybe like everyone (except me) already knows... so, what is the deal on acceptable step motor voltage ranges?

The voltage is generally the voltage dropped across the winding at the rated
current. Applying that voltage only would require inifinite time to build up
to rated current due to winding inductance. All newer stepper driver designs
of any quality use some sort of switching technology to regulate winding
current once it reaches the preset limit. Older designs used large power resistors
to limit motor current. Either way, to get acceptable speed out of the motors,
a higher voltage must be available to the driver.

Jon