Homebrew engraver to 3D printer Mod

Gallery, Projects and General > Project Logs

<< < (15/17) > >>

BillTodd:
played around with this today...got no where!

I tried changing the 0,0 point to the corner , incase the mesh level could not handle four quadrant maths , still the same

problem seems to be the g29 routine does not give the motion systen time to move , so the display shows the correct coordinates but the motors don't move!.

experimented with UBL but that's no better , hammering the x zxis to one side.

at a loss ATM so any suggestions welcome.

ddmckee54:
Don't have auto bed leveling so this is just a shot in the dark.

The info that I found on auto bed leveling, found it here http://marlinfw.org/docs/gcode/G029-abl.html, has the following in the notes:

"Any arguments left out of G29 will use the default values set in Configuration.h.

G28 disables bed leveling. Follow with M420 S to turn leveling on, or use RESTORE_LEVELING_AFTER_G28 to automatically keep leveling on after G28."

You've probably already read the notes, but like I said it's a shot in the dark. The Configuration.h file is probably where you need to modify the Z offset to suit your probe.

Several posts back you asked about tweaking your steps/mm values, I do it in g-code with my start-up script. If you still need/want to do that let me know and I'll tell you how I do it.

Don

BillTodd:
cheers Don,

I have a look at that , it certainly makes sense.

BillTodd:
After several hours fiddling.

I've come to the conclusion my Z axis is drifting (not enough to cause the Z offset but something that needs fixing) .It is losing 0.3mm after a just a few moves. In use without bed levelling this probably didn't matter much (it was only moving up).

I want a faster Z screw anyway so I might take a break and have another look at this when that's fixed.

Bill

BillTodd:
Hi All, Continuing the 3D printer saga...

A while ago (at least one pandemic and a kidney stone ago) I added a BL touch clone to do auto bed levelling.

I was using Marlin 1.1.19 (?) but was never able to get levelling to work . The saga continues having upgraded to Marlin 2

ATM having now rearranged thing to give a 0,0 at the lower left corner , I can get it to start the 9 point BiLinear level .

The printer homes to X & Y switches , then jumps to the middle of the bad and zeros the Z using the BL touch . This all works fine and sets the nozzle height nicely.

If I try to level (the bed is pretty good having manually levelled it) it rapids to front/left 1 of 9 points , lowers the probe and ... fails to touch down!

Any ideas where to start looking in marlin for the probe settings??

Navigation

 Message Index

Go to full version