If your willing to do 180 or less you can do R style arcs. I find that most people have a hard time with the I J vectors to tell where the start point is. But the radius seems to be something that everyone can do !
G0 X1 Y1
G02 X2 R.5 F50
G01 Y0
G02 X1 R.5 F50
G01 Y1
M30
This is how I do it when I am doing hand coded parts. I also use cutter comp so I can reuse the code for finish and roughing passes. But I have been told that I am not normal anymore :(
Thanks
Brian
______________________________
Brian Barker
Engineering / Development
ArtSoft | Newfangled Solutions
Livermore Falls, Maine (USA)
Webpage:
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On 2/13/2022 2:09 PM, spencer@... wrote:
that is the first place i looked. i did a couple of tests but not a successful one yet. the one in the thumb drive that i have not tested yet should work. i probably got some addition wrong in the first one. i need to figure out how to use my calculator reliably with negative numbers. Actually I just thought of using a spreadsheet but the copying and pasting would be a bitch.
Then I thought of writing a script to apply the offsets but that would be pretty complicated and a lot of work for one use. Does anyone have a script already written to do this?
If I clean up the gcode, remove comments format every statement the same, it might not be too difficult of a script.
i am just so awful at simple math. i would rather figure out a complicated formula than add a couple of numbers :) And don't ask me about multiplying. I would be lost without a calculator.
i am working on the spreadsheet, decided scripts will take all day to write.
On 2/13/2022 2:13 AM, Paul Galarneau via groups.io wrote:
Take a look at this web page, very clear:
:) :)
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
spencer@...
Sent: Saturday, February 12, 2022 8:12 PM
To: [email protected]
Subject: Re: [MachCNC] arc question
To answer my own question maybe. It looks like I am j are relatibe so they
should not be offset
Feb 12, 2022 4:02:44 PM spencer@...:
I have some gcode that I wrote a long time ago, using cambam, I think. It
made the circles for me so I did not need to understand G code arcs. Over
the years I have move the circular pockets relative to each other by using
offsets.
I want to get rid of the offsets for various reasons. I still am not clear
on arcs but is moving the location of an arc less complicated than I think
it may be? Here is an example. I use G52 to set the X and Y offsets. To move
the circle without using offsets do I just need to add the offsets to all X
and Y coordinates and add the X offset to the I and the Y offset to the J.
I hope it is that easy :)
G52 X 0.01 Y .6125
(thru hole)
(1ST PASS)
G1 F146 X0.0095 Y0.0
G1 F52 Z-0.34 X0.2095
G2 F40.0 X-0.1048 Y-0.1814 I-0.2095 J0.0
G2 F40 Y0.1814 I0.1048 J0.1814
G2 X0.2095 Y0.0 I0.1048 J-0.1814
--
Best regards, Spencer Chase
67550 Bell Springs Rd.
Garberville, CA 95542 Postal service only.
Laytonville, CA 95454 UPS only.
Spencer@...
(425) 791-0309
