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G41 for USBCNC?
Posted: Mon Jun 04, 2012 10:14 am
by Spartan117
Hey Les,
i know that you tried to support G41/42 earlier and that you've given up because every control wants its own kind of entry-moves etc.
So that means it COULD be done, but for every control seperatly?
If so, how much would it cost me, if i would like to have G41/42 working for USBCNC?
Thank you very much and best regards,
Marc
Posted: Fri Jun 08, 2012 6:45 pm
by Spartan117
Not interested or not enough time or simply not seen yet?
Posted: Mon Jun 11, 2012 10:09 am
by Les Newell
Sorry about the delay in getting back to you. Currently SheetCam is not capable of supporting G41/G42. I did do some experiments but didn't finish implementing G41/G42 support after the struggles I had with entry moves.
Posted: Mon Jun 11, 2012 1:01 pm
by Spartan117
Hello Les,
as i said, would it be possible to "buy" this Addon from you?
The needed entry-moves for USBCNC are documented very clearly in the usbcnc-manual at edingcnc.com
Posted: Fri Jun 15, 2012 4:01 pm
by Les Newell
I can't really do this as an addon btu I'll take another look at the code and see if I can get it working. I do need to finish off V carving and some changes to the plasma path generation first.
One problem I came across was handling ramped cuts. In some cases the cutter needs to 'back up' after a ramped entry. Do you know of any way to implement this in G-code when using G41/G42? Most controllers will choke if you simple swap G41/G42 when you back up.
Posted: Sun Jun 17, 2012 8:19 pm
by Spartan117
Sorry, i do not understand, what you mean? Can you describe this in another way?
What do you mean with "back up" ?
Posted: Mon Jun 18, 2012 12:25 pm
by Les Newell
Spartan117 wrote:Sorry, i do not understand, what you mean? Can you describe this in another way?
What do you mean with "back up" ?
Imagine you have a simple straight line cut but you want to use ramping. The cutter will ramp down to depth but it then has to reverse direction to clean up the ramp and leave a square cut start. You wouldn't normally use G41/G42 on a straight line cut but the same applies if you are using a leadin and leadout or if you are using holding tabs.
Posted: Mon Jun 18, 2012 9:15 pm
by Spartan117
Other programs i know don't do this, also.
You have to do the first cut without G41, and then the contour again with G41.
There are no possibilities for ramps or stuff like that