Author Topic: calibration  (Read 409 times)

ggallant571

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Re: calibration
« Reply #15 on: September 04, 2019, 08:19:50 AM »
If the end use is cutting and precision is the primary concern then speed is less of an issue.
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just_doug

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Re: calibration
« Reply #16 on: September 29, 2019, 05:44:48 AM »
With a machine that size I think the problem lies in the basic construction of the frame and the drive system for the cutting head. 
There is a problem with rigidity (plastic corner pieces, I also don't see any 45's bracing the inside corners) and belt stretch (small belt, long length).  I have not seen a system that uses a drive shaft instead of two opposing steppers.  Any play or twisting there will also cause problems.  I have done some machine building in my time and I would say .2 percent isn't bad with the current setup.  If precision is truly critical, go with the lead screws ggallant proposed, just turn down laser power to compensate.  OH, that makes me wonder.  Do you get the same percent of error at low working speeds ( <300) as you do at high speeds (>1200)?  Also, which axis does the error seem to be the worst in?

Doug