On 12/12/23 17:39, Nicklas SB Karlsson wrote:
Have a quite large part compared to the machine there I put the zero
point in the lower left corner. As machine limits for (x, y) movements
are zero in the middle an offset is added then touch off part. Pretty
sure I got it right and part is within machine limit but check fail
complain axis is outside of machine limit.
Then an offset is added either by G10 L2 or by touch off button
machine coordinates and G-code coordinates does not agree anymore. So
problem might be Linuxcnc check the G-code only but do not add the
offset set during touch off or of simply make the calculations wrong.
There also seems to be a problem with the minimum and maximum limits
shown in the preview view. Then no offset is added machine and relative
position is same and everything is OK. But then an offset is added by
G10 L2 or touch off it seems selecting machine position in view menu
show coordinates in G-code which must be wrong then an offset is added
to the G-code. Selecting relative coordinates show other coordinates
with same distance but they are neither the numbers from the G-code nor
the absolute position if I maded the calculation correct.
Anybody else had similar problem?
Those limits Nik, set in the .ini file, are relative to the g53
coordinate map, or are supposed to be. That's so they don't move
physically when the mapping is changed by a touch off or whatever.
The g53 map's zero position can be anyplace, but I usually set zero near
the center of the envelope regardless of home switch locations which are
generally just a few thou from mechanical end limits then offset back to
near the center for the zero point, but that for me is just a personal
pref as that allows me to use the home switch as a that end of travel
limit switch in the .hal file, with the other end just a software limit
in the ini file. Saves me one or 3 pins on the end bob.
It can be confusing too if the saved vars lists in
linuxcnc/configs/your-config/position.txt or linuxcnc.var file are
contaminated, so you might want to rm them, restart linuuxcnc and rehome
to remove that potential src of the machines confusion.
You also didn't note which version you're using. Andy will want to know.
I run master on all my wintel boxes and haven't noted a problem but
haven't really exercised either of them in about a month as I'm fiddling
with final trimming of a vise screws production on a 3d printer farm I'm
also re-building. Making the screw has now become a 2 machine process as
the rough carving has been moved to the go704 from the 6040, taking me
from 2 days to make one screw to 2 a day. I made an A axis for the
go704 which is about 300x faster at the rough rounding of a square
stick. An A axis that can spin 500 rpm with arcminute or better accuracy.
Regards Nicklas Karlsson
Take care, stay warm and well.
Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
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