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How to set contour overlap on Haas machine?

allenp

Aluminum
Joined
Jul 13, 2015
Machine is older, it is actually Mikron Haas VCE 500, but the control is very similar/equal to newer Haas mills.

We have problem with this machine that it doesnt finish contour (toolpath) very precise, for example if you make a circle it will leave a small amount of material around start/end point of mill toolpath (circle).

So we deal with this in CAM software, to extend this toolpath for example by 2mm... or make 2 circles instead of one.

But this problem occurs only on this older Haas machine, we have 2 newer and they dont have this problem.

Is there a parameter or setting on the machine which could overlap this contour for some amount so this problem wouldnt occur?

Thanks in advance.
 
Machine may have some backlash, setup may have some spring as is often the case.

If an important dimension I'l take a spring pass/finish pass in conjunction with some overlap plus start and finish with a radius to ease in and out of the cut.
 
Are you using the same post on the new and old machines?
What does your lead-in and lead-out code look like?
 
Thanks but none of this has nothing to do with real fix.

SIM mentioned backlash, that would be step in right direction, not fixing g code
 








 
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