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Author Topic: Circle gcode only an arc  (Read 8081 times)

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Circle gcode only an arc
« on: August 12, 2011, 04:37:09 PM »

I made a circle in illustrator to do a test on my cnc using mach3. I imported a dxf into LazyCam bit it was an octagon. I imported a pct and it was a circle. I then saved the gcode to import into Mach3 but Mach3 only sees an arc. I am new to all this but it seemed that is should have worked. ???

Offline BR549

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Re: Circle gcode only an arc
« Reply #1 on: August 12, 2011, 04:47:26 PM »
Looks like the shape you imported was not a true circle but made up of small lines.  The reason for so many nodes/entities. Chances are good that Lcam saw a Break in one of those lines that it could not resolve and created the arc with what info it saw.

Just a thought, (;-) TP

Offline RICH

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Re: Circle gcode only an arc
« Reply #2 on: August 12, 2011, 05:32:06 PM »
I would strongly suggest that you use a vector based CAD program to draw your shapes or a CAM program that provides CAD / vector based drawing.
You may want to try setting the tolerance setting differently in LC and see what happens. Sorry, I  but don't  provide LC support for anything other than vector drawn files.
RICH

Offline ger21

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Re: Circle gcode only an arc
« Reply #3 on: August 12, 2011, 05:36:40 PM »
Looks like you have a demo of Mach3, which limits you to 50 lines of code from LazyCAM.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Circle gcode only an arc
« Reply #4 on: August 13, 2011, 09:59:33 AM »

I just finished building my Joe's Hybrid 4x4 and was trying to test a couple of shapes to make sure it was moving correctly. If it could do a circle than I would feel confident that everything was tight. I haven't purchased any software yet because it's all very expensive and I don't want to make the right choice.

Thanks for the help. I am sure I will be back. ;)

Offline ger21

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Re: Circle gcode only an arc
« Reply #5 on: August 13, 2011, 10:42:16 AM »
Here's a 24" diameter circle for you.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Circle gcode only an arc
« Reply #6 on: August 14, 2011, 06:20:09 PM »

THANKS!!!!   ;D