RE: [CAD_CAM_EDM_DRO] What is a sense coil? Not all 8 wire stepp ers are unipolar!

Steppers drop off in torque quite quickly with rpm. The low inductance of
the coil is the major factor in maintaining torque as the rpm's increase.
Low voltage, high current seems will yield lower inductance than high
voltage, low current.

Also, to help overcome the inductance you normally run 5 - 10 x the rated
voltage if you are using a current limiting drive. With a high voltage motor
this becomes an expensive proposition.

Tim
[Denver, CO]

> It seems that drivers are limited by the amount of current they can
> provide, which makes me wonder why the coil wouldn't be higher volts,
> lower amps to accommodate.