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I haven't done D slots yet but I do have circular arcs.

Either IJ or Radius mode G-Code is generated. The code is written in Pascal via Lazarus IDE which means write once, compile anywhere. The attached photo was done on a MachineKit BeagleBone Black. I've run it on Raspberry Pi, LinuxCNC and of course Windows.

I can send you the source code and you can get the free Lazarus or I can send the EXE in a zip file.

You can also use metric parameters as the attached windows version of the program shows.

John

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of spencer@...
Sent: May-11-21 1:07 PM
To: [email protected]
Subject: Re: [MachCNC] tool offset

i am trying to be lazy at least for initial testing. my code is a mess
developed over time. i also wrote it a long time ago using various tools
and do not remember how they work but certainly can learn again if
forced to.

so the last question is: if i have circular pockets using arcs is there
any simple change to the arcs that can effectively compensate for a
larger cutter? i have been making my pockets with something like cambam?
so i never really learned the syntax for arcs.

I know there are all sorts of wizards for mach4. i will look soon but is
there something for creating simple shapes like circular pockets and a d
slot which is two straight moves and two arcs?

On 5/11/2021 12:55 PM, Ken Strauss wrote:

Read the description for G41/G42 carefully since there are leadin/out requirements related to cutter diameter. If you were not

previously using cutter compensation it is doubtful if your CAM follows those rules for an even larger cutter. Why not simply redo the
CAM?

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of spencer@...
Sent: May 11, 2021 3:43 PM
To: [email protected]
Subject: [MachCNC] tool offset

I am looking for a simple solution. I am using a 1/4" router bit to cut slots d shaped pockets and holes i would like to use a bigger

cutter for various reasons. especially for testing i would like to do as little reprogramming as possible.

i have read about cutter compensation but can not make sense of it. is there a way to apply a cutter compensation and switch to a

3/8" bit and make the same sized slots holes pockets etc. Do i need to turn compensation on and off for each arc of a circle, for
example or can i just make a 3/8" bit behave like a 1/4"? there are no features with a minimum inside dimension of less than 3/8"

--
Best regards, Spencer Chase
67550 Bell Springs Rd.
Garberville, CA 95542 Postal service only.
Laytonville, CA 95454 UPS only.
Spencer@...


(425) 791-0309

--
Best regards, Spencer Chase
67550 Bell Springs Rd.
Garberville, CA 95542 Postal service only.
Laytonville, CA 95454 UPS only.
Spencer@...


(425) 791-0309