CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] sevoo schematics

Posted by Jon Elson
on 2001-09-24 11:04:25 UTC
jhtkcarn@... wrote:

> does anyone have servo drive schematic and how it differs from
> stepper drives

there is a huge difference. Steppers have discrete steps in the
motors, and you drive the two motor phases with constant current
supplies. To reduce power consumption, these are usually done
with switching techniques.

The simplest servo system has a DC brush motor and a position
encoder. The difference between actual position and desired position
causes power to be fed to the motor to reduce the error. It gets
a LOT more complicated after than, with velocity feedback from
a tachometer, current feedback from a current sensor, PID
algorithms, loop response, etc.

Jon

Discussion Thread

Jon Elson 2001-09-24 11:04:25 UTC Re: [CAD_CAM_EDM_DRO] sevoo schematics