On 04/15/2020 08:00 AM, Stuart Stevenson wrote:
Hi,
It sounds to me like you will run into a problem with G41/G42 when you get
the roughing radius offset working like you want.
When using G41/G42, if the tool radius (plus any diameter/radius
modification for roughing) is not smaller than the programmed radius of the
corner LinuxCNC will give you an error code and will not run. Maybe
G41.1/G42.1 or G41.2/G42.2 will handle this but I have never used either so
I don't know.
You have to choose the right lead-in and lead-out points
knowing in advance that you will be making a cutter offset
greater than the actual tool diameter for the roughing
pass. I did this some years ago when I coded some tricky
shapes by hand, and after a few tries it worked well. I
think the better way to do this is to make the lead-in and
lead-out moves arcs, that solves the gouge problem. I have
not tried this.
Jon
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