Machsupport Forum

Mach Discussion => FAQs => Topic started by: bochmannfa on March 25, 2015, 10:14:24 AM

Title: Cutting thick materials on a mill
Post by: bochmannfa on March 25, 2015, 10:14:24 AM

I'm new to cnc and am using mach 3 to run a mill on which I am cutting 3" thick Gatorfoam.
Since the bit is very long I can't seem to slow the x and y movement enough to keep the bit from breaking off at the collet.
How do I slow the x and y speed?

Title: Re: Cutting thick materials on a mill
Post by: Tweakie.CNC on March 25, 2015, 11:58:49 AM

Check that your Gcode uses G01 moves for the X and Y then edit the Gcode to reduce the F*********x (feedrate). Alternately, the Feed Rate Override slider can be adjusted downwards (main screen).

Tweakie.

Title: Re: Cutting thick materials on a mill
Post by: RICH on March 25, 2015, 12:29:08 PM

Consider doing multiple depth cuts and a finish cut at full depth.

RICH

Title: Re: Cutting thick materials on a mill
Post by: bochmannfa on March 27, 2015, 09:13:50 AM

Both of those things helped a lot but I also ended up plaining the bed. It turns out I had some pretty nast high spots which were cathing the bit. I also ran into a problem when I slowed the feed rate too much. The bit melted the foam. The learning curve is pretty steep on this stuff. Thanks for the help.