ADJUSTING LINEARIZATION TOLERANCE

[KMI]

Hello all,

Can someone tell me how to adjust the tolerance in the operations manager. We have been cutting some ellipses and have found that the control is making little lines in the part. We are using a takumi seiki v10ah with a fanuc 18mc control,with full lookhead features. Mastercam version 8.1.1.

 

Any help would be great.

Thanks

[gcode]

Try using Modify/Curves to Arcs on your ellipse.

Then enable the Filter parameter in the Contour

operation. You can tell if its going to work

by comparing the size of you NC file before and after the changes. The new file should be much smaller and have a bunch of G02 or G03's in it.

 

[ 11-06-2002, 01:18 PM: Message edited by: gcode ]

[Allan Brown]

Tightening the Linearization tolerance in the Contour operation parameters may not improve your toolpath. Splines are converted to lines that are allowed to deviate from the spline by the linearization tolerance. Most likely you should be playing with the Filter option in the Contour operation parameters. You'll want your Linearization tolerance to be tighter than your Filter tolerance.

 

I'm assuming you are using Create-Next menu-Ellipse. If your geometry is some else entirely, and chunky, that could be a core issue.

 

[ 11-06-2002, 01:20 PM: Message edited by: Dave Thomson ]

[Roger Peterson]

were these elipses created in Mastercam? Are the elipses splines or small line segments? The linerization tolerance only affects the portion of the chain that is a spline. Definately use the filter regardless if they are splines or line segments. To go any deeper it would be nice to know if they are already splines or short line segments.

[KMI]

Thanks for the quick replys. The ellipse was created in Mastercam. I reset the tolerance tighter than the filter and the issue is fixed. Great site to get information from. Have a good day.

Thanks again.

Kodiak Motorsports Inc,