PMDX Forum
General Category => Parallel Port breakout boards, motherboards, and dedicated accessories => Topic started by: kemlin on September 08, 2017, 11:50:01 AM
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I have been able to get my axis moving however they will only move enough to get the line count to go to the fault mode at the drive. I am sure I have something in setup goofed up but wanted to run some things past you guys to see if I am missing the forest for the trees. I have a PMD-126/107 going to Gecko G320X drives controlled by Mach III. I have CUI encoders set to 500ppr and my lead screw requires 5 turns to make 1". I set up in Mach to have 2500 pulses per unit. The drives move accordingly so I am confident that I have the pin #s setup correctly for the servo output from Mach. Do I need to run a "charge pump" to make things happy? What am I missing?
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If your drives move the correct distance, then you have the counts
per unit configured correctly for your Encoder and G320 setup.
If the fault only occurs sometimes, you may have a tuning problem.
Try running with lower velocity. If this cures the problem, it is likely
a tuning problem.
The charge pump is required if you are using the PMDX-126 to
interface with the Err/RST terminal of the G320 drivers. If you are
manually resetting the drives and have not connection from the
Err/RST terminal to the PMDX-126, then a charge pump is not
required.