Probably because you're running a relatively high feedrate, with a relatively low acceleration. When running in constant velocity mode, something's gotta give, and it's sharp corners. Either increase acceleration, or decrease feedrate. I believe using exact stop mode will also cure that, but at a cost....
Regards,
Ray L.
Hi HimyKabibble,
Firstly, thanks for reply.
of cos, I wish to increase feedrate. Otherwise I have to spend more than 6 hours to complete a workpiece(due to thousand lines to run)!
So, as you mentioned, to increase acceleration in mach3? or do I need to adjust servo motor's parameter too?
Thanks again.
You need to try to increase the acceleration in Mach under Config->MotorTuning. See how far you can go before it starts faulting, or losing position, then back off 20-30%. If that doesn't get you there, then your only choices are:
1) Reduce feedrate or
2) Live with rounded corners or
3) Use exact stop mode, which will introduce other issues that may be equally unacceptable or
4) Get bigger motors that allow you to increase acceleration
Regards,
Ray L.