@hebigt
I made a new account because its going professional, now.

Thanks for your fast reply. I think I'll work it out. This short example is quiet helpful!!

I have two custom toolchanger with a 103x103x103cm built volume with
lovely closed loop steppers.

@dc42
Very nice. thanks
Please tell us when it's uploaded. I'm waiting for it since the very first hour of the 1hcl

@Diamondback
I have a similar problem on 2 different machines. Both were working correctly with 3.4.5 , now I have some Z high issues on both.
Multiple / 4 z-axis at work.

Richard

@index4d

https://support.sliceengineering.com/portal/en/kb/articles/mosquito-magnum-dual-heater-configuration-for-reprapfirmware

@index4d but I can post that there is an error... funny

@Diamondback

I had 2 prints with machine 1 (GeneralG) where I had little extrusion problems..... after a little pause, the nozzle crashed into the model.
Objekt high 90mm. Problem started at about 50mm.
Extrusion problems -> may missing z steps?
Nozzle crash into model after PAUSE --> missing offset or much more z steps were missing? (about 4mm-->like other problem with machine 2)

I thought somthing is wrong with my axis and because I wanted to change the x gantry, I stopped printing with machine 1 (Generalg).

Then --->

1.--> Machine 2 (Black Flamingo) lost steps after every print, because I had to readjust z every print start something between 0.2 and
0.6mm. Missing z steps in this case are NOT shown in the model but It was a 10mm high print only. May it´s losing steps by any other action. Finish print or start print?
It´s definetely not normal to readjust z offset after every 45min print. Print looks nice but Z offset needs to readjust? Strange

--> 2 . Nozzle crashed into heatbed when executing ´´print again´´ - I think printer ´´forgot´´ the z offset. (4mm). Tool was already coupled from print before.

R.G.

@index4d

Thanks a lot

error - can´t post

hey lovely community,
I bought a bondtech lgx with the magnum plus which has two options for heater and thermistors. Of course, I want to use them.
Is there a describtion about how to wire both heater onto the Duet Toolboard and how to do it with two thermistor. Like one is just for safety?

Would be lovely to get a link or a little help.
Heater: heatlink bondtech 50w 24v
Duet 3

Thanks a lot!

@phaedrux
tool switch = is a z prob for tools.

I´m getting this error when selecting tool.

@gloomyandy

ah ok
to easy to be true
ok thanks

@o_lampe
oh I´m not sure.
So I should delete this at my end?

@droftarts ok
no problem
I´ll try it.
thanks

@droftarts
I did already above..

G1 X610.176 Y449.295 E0.10056
G1 X611.585 Y450.704 E0.19684
G1 X610.566 Y450.704 E0.10066
G1 X609.158 Y449.295 E0.19677
G1 X608.14 Y449.295 E0.10056
G1 X609.548 Y450.704 E0.19677
G1 X608.53 Y450.704 E0.10056
G1 X607.121 Y449.295 E0.19684
G1 X606.103 Y449.295 E0.10056
G1 X607.512 Y450.704 E0.19684
G1 X606.493 Y450.704 E0.10066
G1 X605.085 Y449.295 E0.19677
G1 X604.067 Y449.295 E0.10056
G1 X605.475 Y450.704 E0.19677
G1 X604.457 Y450.704 E0.10056
G1 X603.048 Y449.295 E0.19684
G1 X602.03 Y449.295 E0.10056
G1 X603.439 Y450.704 E0.19684
G1 X602.421 Y450.704 E0.10056
G1 X601.012 Y449.295 E0.19684
G1 X600.745 Y449.295 E0.02637
G1 X600.745 Y450.046 E0.07419
G1 X601.402 Y450.704 E0.09185
G1 X600.745 Y450.704 E0.0649
;TIME_ELAPSED:5734.465541
G1 F6000 E-0.2
M140 S0
M204 P4000
M204 T4000
M566 X1200 Y1200
M82 ;absolute extrusion mode
M107
G91 G1 Z20 F400 G90
M83 ;relative extrusion mode
M104 S0
;End of Gcode

@Phaedrux
Do you have a stop.g present in the sys folder? - no, should I?

When do you run G32 for bed.g? - also when homed manually.not every print. I´m not sure if before or after G29. What would be correct?

When do you run G29 S1 to load the heightmap. It should be loaded after homing Z. ----- after homing Z ( I tried before only one time but of course I got an error)

@Phaedrux

Power on ---> homing x, y, z, c manually. --> select tool --> start print

I Do the mesh probe after homing ... not before every print.

I tried to apply G29 S1 before and after homing z . Does not made any differences.
When would be the correct time to apply G29 S1?

I just finished a 2 hours print and cancelled the print a few seconds before finishing. After that the z position was still correct. I´m wondering why finishing prints can produce this Issue in any way.

@Phaedrux

What is in your slicer start gcode? -nothing, don´t have a homeall.g or so
What is in your homeall.g? -nothing / don´t use that
Do you use start.g? - no

Can´t go back to 4.... cause of closed loop and other issues.
With readjusting I can work for a moment

and BIG EDIT: If i would loose steps, I would loose steps in the upper direction?
Is it clear, that the nozzle is to far away from the heatbed and not the heatbed is moving?
So I think loosing steps in this direction is not possible.
Sorry when I forgot to describe my axis.

@Phaedrux
I´m pretty sure not to loose steps
I print with z = 6mm/s.
Prints are looking good.
When I print 1 hour and skip at the last layer, I don´t have this extra amount.
When I print just 1 minute and finishing it, I have extra amount.
And. When I do not use mesh compensation, I don´t have this problem.

@droftarts
bed.g is already corrected. same behaviour...

Probing in the middle is not an option. At the other printer there is low deviation and there is not really a deepest point. I don´t like the idea to look for the deepest point on several printers. Also there will be still any deviation, even it´s not much.
I mean the first print is fine.... then z-1.6 , 3.2, 4,8-

and I already was working with this commands without problems for months. I think it came with 3.5

When I stop a print, next print starts at same height.
--> when finishing a print. --> extra offset added.

EDIT: when Using a deeper point for homeZ, the extra offset is smaller, the higher the point is, the extra amount which is applying is bigger.

G1 X610.176 Y449.295 E0.10056
G1 X611.585 Y450.704 E0.19684
G1 X610.566 Y450.704 E0.10066
G1 X609.158 Y449.295 E0.19677
G1 X608.14 Y449.295 E0.10056
G1 X609.548 Y450.704 E0.19677
G1 X608.53 Y450.704 E0.10056
G1 X607.121 Y449.295 E0.19684
G1 X606.103 Y449.295 E0.10056
G1 X607.512 Y450.704 E0.19684
G1 X606.493 Y450.704 E0.10066
G1 X605.085 Y449.295 E0.19677
G1 X604.067 Y449.295 E0.10056
G1 X605.475 Y450.704 E0.19677
G1 X604.457 Y450.704 E0.10056
G1 X603.048 Y449.295 E0.19684
G1 X602.03 Y449.295 E0.10056
G1 X603.439 Y450.704 E0.19684
G1 X602.421 Y450.704 E0.10056
G1 X601.012 Y449.295 E0.19684
G1 X600.745 Y449.295 E0.02637
G1 X600.745 Y450.046 E0.07419
G1 X601.402 Y450.704 E0.09185
G1 X600.745 Y450.704 E0.0649
;TIME_ELAPSED:5734.465541
G1 F6000 E-0.2
M140 S0
M204 P4000
M204 T4000
M566 X1200 Y1200
M82 ;absolute extrusion mode
M107
G91 G1 Z20 F400 G90
M83 ;relative extrusion mode
M104 S0
;End of Gcode

@Phaedrux said in extra z-offset every new print G29?:

if you're getting some sag on the XY axis rails

To be honest.
In this case the corners are moved up because of the isolation foam under the glass.
I have full carbon x gantry and not more than 400gramm as toolhead.

BUT without such massive deviation. It would have been much more complicated to find out the problem.
I change this at the moment at my bigger printer.... after that on this machine.
So or so I have this issue. Also ennoying when only a deviation at 0.2mm.

Let me try to use an exact point for g29 and homeZ...