Originally posted by HomeCNC
If the Gecko drive gets behind processing steps because of a heavy cut or too fast of feed the drive will fault but the software will not know this has happened. It is the next best thing to a complete closed loop system for a lot less money. [/B] |
It's a matter of having to fit a servo drive to what popular CNC programs are out there. These are primarily "step and direction" output programs with no provision to close a PID loop back at the PC.
The G320 aquits itself rather well. I ran some tests where I accellerated a motor loaded at its rated cont. torque to 2400 RPM in 125 milliseconds while tracking the position error TP. The error never exceeded +/- 4 encoder counts (0.72 degrees).
I have a digital sampling scope picture which shows the drive's position error response in detail.
I have posted it to the G320/G340 folder in the files section of the yahoo group "geckodrive". I'd post it here but the .pdf file at 105K exceeds the 80K limit here and .pdf is not a listed valid extension.
Mariss