Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: jon8949 on January 14, 2015, 08:38:26 PM

Title: 3D Cut Issue
Post by: jon8949 on January 14, 2015, 08:38:26 PM

Hi, hopefully someone might have a suggestion with my issue.  I have cut many flat parts without issue but recently just cut 2 3D patterns in tooling board.  Both had the same issue. The issue I'm having is from the top edge of the part to the side, it should be a sharp edge but it ended up with about a 1/16" radius on the edge.  The radius is consistent around the whole part.  All other dimensions are good on the finished part. Here is a like to a picture of the part.  http://i1148.photobucket.com/albums/o567/jon8949/CNC/IMG_20150114_184916668_HDR_zpsf47a663b.jpg

The 3D Rhino data file has the part with a sharp edge and I run Visual Mill for my CAM software.  During my simulation in Visual Mill it also shows a sharp edge.  I'm not sure if there is a setting in Mach3 that could be causing my issue.  I'm running a Gecko G540.

Any help would be appreciated.  Thanks, Jon

Title: Re: 3D Cut Issue
Post by: madeintheshed on January 14, 2015, 08:47:07 PM

Maybe your acceleration / decelaration settings in motor tuning?

Title: Re: 3D Cut Issue
Post by: ger21 on January 14, 2015, 09:22:05 PM

Mach3's CV mode is rounding the edges. Faster acceleration/lower feedrates may help, or playing with the "Stop CV on angles" setting.

Title: Re: 3D Cut Issue
Post by: jon8949 on January 14, 2015, 09:42:49 PM

Thank you both for the info.  I'll check that out tomorrow on the machine.