RE: [CAD_CAM_EDM_DRO] chopper?

A chopper stepper driver is one that controls the current to the
windings by monitoring the current and rapidly switching the current on
and off (chopping). This allows them to run a much higher voltage than
the motor is rated for and the high voltage helps to overcome the
inductance of a stepper to allow better torque at a higher rpm. The
alternative is to balance the drive voltage with power resistors to keep
the current within the limits of the motor rating. Not as efficient and
worse it will require that you use a power supply that is pretty near to
what the motor voltage is rated.

Tim
[Denver CO]

> -----Original Message-----
>
>
> Okay, what's a chopper driver?
> How does it differ from a regular driver?
> What benefits or drawbacks does it give?
>
> Thanks,
>
> Weyland
>
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/