QGL making it worse

General Discussion
1

Basic Information:

Printer Model: voron 2.4 (formbot)
MCU / Printerboard: BIGTREETECH MANTA M8P
Host / SBC: CB1
klippy.log
klippy(1).log (2.7 MB)

when I try to level the gantry it just gets worse and worse
first round the points are about:
1.6
2.4
-1.4
-3.7
image
second round the points are about:
5.3
3.7
-4.0
-6.7

I have checked the wiring to the 4 z motors 3 times, I inverted the dir pins on the two back motors because when I tried to home an axis the front ones would drive up and the back down. but now they all drive like they should. and it doesn’t seem to matter what way the gantry is unlevel it just gets worse

2

Did you precisely measure the joint points and probing points?
If those are off z_tilt or QGL will produce a mess.

3

image
the points I gave were the points it measured

I solved it, when googleing what z_tilt is, I saw the QGL in the Configuration reference, there I saw this:

 ----------------
 |Z1          Z2|
 |  ---------   |
 |  |       |   |
 |  |       |   |
 |  x--------   |
 |Z           Z3|
 ----------------

so I cheked if the motors were like that, and they weren’t, when following the wirring guide I saw left as left of the printer not me looking at it. so my motors were like this

 ----------------
 |Z2          Z1|
 |  ---------   |
 |  |       |   |
 |  |       |   |
 |  x--------   |
 |Z3           Z|
 ----------------

so I moved the motor cabels to be right and then, inverted all the dir pins to make it go op not down. and that did it

3 Likes
4

Glad you could figure it out!
Happy printing now. :slight_smile:

5

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