Step controller gains programmable limit output
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Quicksilver Controls product story
Edited by the Engineeringtalk editorial team
Nov 21, 2005
QuickSilver Controls has added a programmable limit switch (PLS) output to its SilverDust controller/driver for servo control of NEMA 17 and 23 frame microstep motors.
QuickSilver Controls has added a programmable limit switch (PLS) output to its SilverDust controller/driver for servo control of NEMA 17 and 23 frame microstep motors.
The PLS command can be configured to use any of the motion controller's possible 23 I/O to change states (ie high to low or low to high) at more than 150 predefined trigger points.
A modulo may be selected to repeat the cycle.
The controller compares the step-motor position with the trigger position every 120us.
When the trigger point is reached, the state of the I/O toggles automatically and the PLS command starts looking for the next trigger point.
Output triggering, trigger point values and number of trigger points may be changed dynamically even while the PLS command is running in the background.
In factory automation, this could be used to change an output's firing sequence for each part coming down the assembly line.
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