Help ... Lightburn is driving me crazy. resetting position all the time and homing incorrect with negative offset

[DimitriG (Dimitri Geelen)]

Hi LB community and dev team. Hope someone has some suggestion on how to resolve this … issue.

Here is the thing:

When I home my system (with x/y limit switches), it sets the x/y postions incorrectly to -198,99.
Parsing GBRL commands (G10 P1 L20 X0 & G10 P1 L20 Y0) will not help.

If I disconnect & reconnect it and then “GET POSITION” in the MOVE tab it will show the correct postions (X=0 & Y=0)

When I issues a “GO TO CURSOR” command it resets to the previously wrongly calibrated values (f.e. when issuing GO TO X=300 , Y=1000 it will go to X=100 , Y=800)

Anyone any suggestions (are most welcome)
Dimitri

btw using:
Openbuilds Acro 1510 with Blackbox (GBRL)

[DimitriG (Dimitri Geelen)]

FOUND THE SOLUTION:
It seems that:

Homing sets MPOS (Machine Coords / G53)
G10 Pxx commands set the ZERO (what you are looking for) - which are offset away from MPOS

Needed to change the “$10 Status report options” setting

Don’t really understand it (also too lazy to read) but it solved it.

There is an article about it here: https://github.com/gnea/grbl/wiki/Frequently-Asked-Questions#why-is-grbl-in-all-negative-coordinates-after-homing-or-it-so-annoying-and-not-what-im-used-to

Dimitri

[LightBurn (Oz)]

We explain it here in our docs about configuring CNC machines for use as lasers:
https://lightburnsoftware.github.io/NewDocs/CommonGrblSetups.html