I’m running into a calibration issue with my Maslow 4.1. After reading through the forum, I’ve been experimenting with the “scale” setting in the FluidNC configuration tab.
Here’s what I tried so far:
Selected “set”, then “save”, and restarted FluidNC.
Performed the full retract / extend / tension sequence — with no change in results.
Repeated the process multiple times, including after a full hard reset.
Tested different values, but the outcome remained the same.
Am I overlooking an additional step? I haven’t found any reference in the forum to another setting that would explicitly enable manual calibration.
Bonus question: I remember that Dlang mentioned creating a page on manual calibration, but I haven’t been able to locate the link. If someone could share it, I’d appreciate it. ( Maybe the “blessed by CnC God” dlang Himself !
since the maslow is a cable driven robot, not a cartesion machine, x/y scaling
cannot work the same way that it does on other systems, and the error is very
rarely really linear in a way that such scaling trys to fix.
the error is likely to be different in different parts of your cutting area.
Bonus question: I remember that Dlang mentioned creating a page on
manual calibration, but I haven’t been able to locate the link. If someone
could share it, I’d appreciate it. ( Maybe the “blessed by CnC God” dlang
Himself !
let me know if the instructions there aren’t clear enough
note that what the current maslow documentation calls ‘calibration’ is really
‘find anchor coordinates’
As for the error, you are right, the center seems to be constistent, but i have slightly different measurement on the extreme.
Actually a 2% error. Still working out what’s the problem. Wil retry new calibration tomorrow
before you do that, I would suggest that you draw a grid or drill a grid of
points to see where the error actually is. There was someone who did this and
found that on their frame, they had almost no error until they got close to the
edge. If that’s the case, then the answer is probably to figure out a way to
move the anchors further apart and see if you can get all your work into the
‘good’ area.
I wrote this gcode for drawing a grid http://lang.hm/maslow/test-grid.nc it
works in an online simulator (https://ncviewer.com/ ) but when I load it into
the maslow the display shows it doing something very wrong. I haven’t had a
chance to test it (I broke an anchor) so if you want to try it, be ready to hit
power if it tries to go off the edge instead of going back across the board
Hi David,
Had a look at this code, is says set inches but G21 sets it to mm. Haven’t run it with Maslow, but only on a simulator, I presume you have set the home to the middle.
Certainly doesn’t look right when loaded into maslow
