Shop Bot Programming odd thing happened

Wood Shop
1

i’m cutting out three triangles, I’ll try to attach a screen shot from easel of the project layout for reference. in my inkscape file and in easel the points look great. we did a test cut on osb and it rounded off the tip of the middle triangle and 5 of the corners on the base of the triangles. thought it was odd but it was small enough to not worry about. I checked the image and upped the speed just a bit. Second one we cut it rounded the same corners but earlier in the cut. on the left side of the pic the blue pin is the first cut the red pin is the second cut. Any Ideas on What might cause this?

Other info : bit size is 1/8 and was set to 1/8 at the time of the cut
three passes to do a full cut all three passes fallowed the same curve.

Shop%20bot
Shop bot.JPG1599×665 132 KB

2

Take a look at the wiki.

http://makeict.org/wiki/Shopbot

Did you add the “G64 P0.001” to your g-code. What you are describing
sounds a lot like what can happen if you don’t.

Steve

3

Yeah, I second what Steve said. LinuxCNC is probably rounding off the corners to save time. You need to add the G64 statement to get it to submit to your wishes.

Here’s a writeup that tries to explain this issue: http://www.probotix.com/wiki/index.php/G64

You can google for “linuxcnc g64” and probably find other info.

Good luck and be careful…it’s a jungle out there…

Curt

4

Yep i think that is what it is, and right at the top of the Wiki page. thank you guys for the help.