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Author Topic: Complete circles from nowhere?  (Read 13281 times)

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Offline gm276

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Complete circles from nowhere?
« on: August 05, 2007, 08:28:16 PM »
I have just started using LazyCam Pro under vista (Mach3 2.4).
It's great! And for the most part really lets me get to what I need
to do quickly. Now for the confusion.

I created a dxf text letter in my cad program (designcad) .
I opened the DXF file in Lazycam. Everything looked great!
Then I pocketed the letter using .125 inch as my mill size.
Again all looked well.
I posted the G-code and flipped over to Mach3.
This is where it got strange.  It looks like as it was doing
curves it tryed to do a small section of curve but instead
did a complete reverse circle.
Probably obvious but not to me. Any ideas.
Thanks
Don B
[i mg]
Code: [Select]
[/img]
Re: Complete circles from nowhere?
« Reply #1 on: August 05, 2007, 08:41:58 PM »
try running a smaller cutter it maybe that the tool is doing a postional move

Offline gm276

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Re: Complete circles from nowhere?
« Reply #2 on: August 05, 2007, 09:58:35 PM »
The path looks fine in the LazyCam view.
See attachement.

I also tried smaller cutter 1/16
and still have problem
Don B
Re: Complete circles from nowhere?
« Reply #3 on: August 05, 2007, 10:54:32 PM »
Looks like a rounding problem. I found five lines that had the same endind point as the previous line, but they were arcs with I's and J's.
That is a command to do a complete circle.

N3005 G2  X1.0123  Y1.3842  I-0.0019  J-0.0312
N3010 G1  X1.0189  Y1.3837   
N3015 G2  X1.0189  Y1.3837  I-0.0024  J-0.0312
N3020 G1  X1.0254  Y1.3832   

Line N3015 has the same end point as N3010. Also N3405, N4300, N4735, and N4765.

I'm sorry I can't help with Lazy Cam, I haven't had a chance to look at it yet, but if you want to fix what you have just delete the bad lines.
Re: Complete circles from nowhere?
« Reply #4 on: August 06, 2007, 05:59:24 AM »
check the dxf to see that the lines join at the end poimt. Can you post a dxf of the cut out

Offline gm276

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Re: Complete circles from nowhere?
« Reply #5 on: August 06, 2007, 08:48:55 AM »
Here is the dxf file of the cutout.
Thanks  Don B
Re: Complete circles from nowhere?
« Reply #6 on: August 06, 2007, 04:04:56 PM »
Your file worked fine in Bobcad here the code
« Last Edit: May 11, 2008, 09:53:30 AM by Benny »

Offline gm276

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Re: Complete circles from nowhere?
« Reply #7 on: August 06, 2007, 04:55:54 PM »
Thanks for trying it in Bobcad.  I put the bobcad file
in mach3 and it appears to get stuck. Attached is the
screen. See attachment.

Offline Whacko

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Re: Complete circles from nowhere?
« Reply #8 on: August 06, 2007, 06:11:21 PM »
Seems like you got the absolute and incremental settings screwed up in the General config setup! Then you will get circles where there shouldn't be any.
Try setting xy as abs and IJ as incremental. Or vice versa! Not sure which is which, I'll hav to check, but I think that's what you got!

Regards,
Whacko
Nothing's impossible
Re: Complete circles from nowhere?
« Reply #9 on: August 06, 2007, 06:40:27 PM »
Try this file I just ran it thru mach 3 off line and it seems to work. you need to set rpm and Z depth along with the feed you want