The POSYS® 1800-PIEZO, POSYS® 1900-PIEZO and POSYS® 4000-PIEZO are motion controller cards (PC-104, PCI-bus and standalone) for servo and step motors and provide one to four axes of motion. The functionality of these series has been significantly improved by using a special motion control chip with enhanced PIEZO (Ceramic) control functions. It is now possible to compensate the special behaviour of PIEZO (Ceramic) motors like for example stiction. Furthermore this function allows to improve motion of heavy loads which need to be accelerated/decelerated quickly or to compensate partially higher or lower friction in mechanical systems to decrease following errors in all aspects.

Piezo motor functionality is available on a given axis when the motor type is servo brushed or servo brushless. All standard POSYS® commands are available with the exception of 4 commands. The downloadable note details the enhancements and changes for this release.

The piezo motor functionality that exists only in this special chip version centers around the ability to change the value of the servo parameters "on the fly" as a function of position error, distance left to move, or whether or not the axis is in motion. In addition there is a user defined offset added to the output of the servo loop. The enhancements are more detailed in the professional press release ready for download.