cutting circles

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28 Jun 2016 16:47 #76751 by clayton cramer
I gave up trying to use a subprogram.

G00 z 2 F 0.5000
G00 x 0.3195 y 0.5000
G01 z 0.0000 F 0.0500
G17 G02 x 0.3195 y 0.5000 i 0.1805 j 0 z 0.0000

complains

1 - Zero-radius arc: start=(X0.3195,Y0.5000) center=(X0.5000,Y0.5000) end=(X0.5000,Y0.5000) r1=0.1805 r2=0.0000

Where is it getting the end from that is causing the problem? The start and center are where I expect.

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28 Jun 2016 17:02 #76752 by BigJohnT
Replied by BigJohnT on topic cutting circles
I just ran each line in the MDI tab of Axis simulator with no problems.

BTW, it is odd to set a preamble like plane select in the middle of a file, normally things like that are set on the first line of a G code program.
gnipsel.com/linuxcnc/g-code/gen01.html

JT

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28 Jun 2016 17:53 #76755 by clayton cramer
Replied by clayton cramer on topic cutting circles
Oddly, it works in MDI mode for me also, but not into AUTO.

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28 Jun 2016 18:23 #76756 by BigJohnT
Replied by BigJohnT on topic cutting circles
I simplified the code down to the following. I'd bet that runs on your machine if you set the F word to a value that suits you. And I also assume some previous code has set something that is messing you up like put you in radius mode or something like that. Using the % can be dangerous unless you have some specific reason to do so.
; set a good preamble
G20 G17 G40 G49 G64 P0.005 G80 G90 G92.1 G94
F25
G0 X0.3195 Y0.500 Z0.000
G2 X0.3195 Y0.500 I0.1805 J0
M2

JT

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28 Jun 2016 18:29 #76757 by clayton cramer
Replied by clayton cramer on topic cutting circles
Same error. What does % do?

I have since realized I can accomplish what I need with my lathe, a drill bit, and a boring tool. That's almost always the case with CNC. It's faster for the first five articles to do it by hand.

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28 Jun 2016 18:43 #76759 by BigJohnT
Replied by BigJohnT on topic cutting circles
More important is what % does not do.

linuxcnc.org/docs/2.7/html/gcode/overvie...de:file-requirements

Is G7 active? I suspect that a typo with a G17 and you possible at some point in time did a G7.

JT

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28 Jun 2016 19:26 #76762 by clayton cramer
Replied by clayton cramer on topic cutting circles
I restarted LinuxCNC and it seems to be happy.

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28 Jun 2016 19:48 #76763 by clayton cramer
Replied by clayton cramer on topic cutting circles
Thanks to all. Now working.

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