Hi all,
This is a Legacy Marlin 1.1.8 question.
I have an old Folger Tech Kossel 2020 with an E3Dv6 and a physical probe that needs detached that puts the point dead-on the nozzle and 32mm lower.
Should you disable the current UBL mesh before starting a UBL probe run?
I am wondering about interactions.
I ran my three towers, got them all about perfect with a 0.1mm feeler gauge and my 0,0 was -0.05.
I did a UBL run, got pretty good bed level and printed all but an extreme corner on my Delta well.
Then to experiment, I set up and ran a G33 calibration, saved it, ran G29 to to do another bed level after saving the offset adjusts and tower angle trims.
Total flub, the tip was too close to the bed. I won't do that again!
So then I wiped the G33 trims from the source, pulled the source in and M500, clean start...
I disabled UBL (G29 D)
bed leveled my towers and checked my zero, all pretty good, then ran another UBL pass and it said most of the bed was -1.xx! What?
So, where am I going wrong?
Is G33 (delta calibration) a bad idea if you get your bed apparently level, or a bad idea in general?
Can you do a UBL bed level with UBL currently enabled? The UBL pages and demo code don't seem to.
It seems the more I try to do, the worse things get! It seems I should have left well enough alone.
(edit 1)
I turned off UBL, leveled the plate using 0.2mm feeler (maybe 0.1 is too agressive), got a 0,0,0 measure at between 0.2 and 0.25. Did a "bed level" print out to the extreme printable edge of 90mm radius that looked perfect. So, I am considering doing a UBL bed level to see what it comes up with, but never turn it on...
( )
(Edit 2)
I found it. My switch had moved up around a mm on its mount because the screw holes were larger than the screws and when the probe had an "aggressive meet with the bed" it pushed it up. Did new probe height and things NOW come out right. Always check your assumptions...
Move along, move along, nothing to see here...
()
Any suggestions welcome!
Be well,
DLC
Edited 3 time(s). Last edit at 12/09/2025 12:49AM by dlc60.
Kits: Folgertech Kossel 2020 upgraded E3Dv6, Tevo Tarantula enhanced parts and dual-head, TronXY X5SA Pro(E3DHemera).
Scratch: Maker-Beam XL Micro Delta, 220x220CoreXY.
Actually bought: Bambu Labs X1 Carbon
