when will the new Z-height actually be saved?

[holco62]

Hi,

I'm having a hard time getting a new Z-height saved.

I have changed the Z-height several times by making adjustments to my hotend setup, but each time I struggle to get it done because in the dozuki it is not clear to me what the way of saving is for the new height , the adjustment itself works fine for me, but it often happens to me that after a reset the old Z-heigt is still there

So the question is, when/how will the new Z-height actually be saved?

Btw, why is setting a new Z-height so complicated at all?
I understand that the probe must have a certain distance from the nozzle, but that can also refer to the nozzle calibration, so for example you set the nozzle to 0mm in relation to the bed and save that height and you're done right away, the rest of the settings that reflect the nozzle height just go with the new value, or do I see it too simple?

Printer: Anycubic Predator
Controller: Duet 2 wifi + Paneldue + Duet Smart effector

[fcwilt]

@holco62

Hi,

To "save" the new behavior you have to update the Z trigger height parameter in your G31 command.

When you are setting the nozzle to 0mm in relation to the bed what steps are you performing that you think should be saving the setting?

Frederick

[holco62]

I do exactly these steps, but when I do the last step (11) the old height is back again

https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe#Section_Calibrate_the_Z_probe_trigger_height

Calibrate the Z probe trigger height
Make sure the dynamic test is successful (Z probe stops when it senses the bed) before doing this.
Cancel any currently active mesh compensation with M561
Use the X and Y jog buttons to position the nozzle over the centre of the bed
Jog the nozzle down until it is just touching the bed or just gripping a sheet of paper. If the firmware doesn't let you jog it down far enough, send M564 S0 to disable axis limits.
Once you have the nozzle touching the bed, send command G92 Z0 to tell the firmware that the head is at Z=0
Jog the head up by 5 to 10mm
Send command G30 S-1. The nozzle will descend or the bed rise until the probe triggers and the Z height at which the probe stopped will be reported. If you are using a nozzle-contact Z probe, the trigger height will be slightly negative. For any other type of Z probe where the probe triggers before the nozzle contacts the bed, it will be positive.
Repeat from step 5 two or three times to make sure that the trigger height is consistent.
In Duet Web Control, go to Settings -> System Editor and edit the config.g file. Set the Z parameter in the G31 command to the trigger height that was reported. Save the file.
Open config-override.g and check that there are no G31 commands in it. If you find any, delete those lines and save the file.
To apply the new trigger height, restart the Duet by sending M999 or pressing Emergency Stop.

[holco62]

My config.g and config-override.g

config.g config-override.g

[achrn]

What do you mean 'the old Z-height is still there'?

You have a trigger height of -0.1mm. Is that not what you want?

[holco62]

@achrn
When I do everything according to the dozuki description the height is always 4mm too high, ie the previous height is still there.

[achrn]

That instruction is to set the probe trigger height. You seem to be talking about something else.

That set of commands only sets up the trigger height of the probe so that the machine knows where the nozzle is relative to the bed when the probe triggers.

If what you mean is that you have changed where the nozzle is relative to the endstop switches (by changing the geometry of some or all of the endstops / carriages / rods / effector / nozzle / hotend) you need to re-run delta calibration (G32) not recalibrate the z probe trigger height.

[jay_s_uk]

This post is deleted!

[Phaedrux]

Please post your homeall, homez, bed.g, start.g and your slicer start gcode section so we can see what is happening.

The smart effector has a negative G31 Z offset because it contacts the bed and presses into it. So -0.1 sounds fine, but perhaps you have another command altering it after startup.

[holco62]

The G32 (achrn) dit the trick But what a hassle to sort everything out for a beginner

What is the way to setup Auto calibrating before each print?

[jay_s_uk]

add G32 to your start gcode

[holco62]

@jay_s_uk

It looks that I don't have a start gcode in my System Directory, or I can't find it

[fcwilt]

@holco62 said in when will the new Z-height actually be saved?:

@jay_s_uk

It looks that I don't have a start gcode in my System Directory, or I can't find it

Hi,

They are talking (I think) about the place in S3D where you can enter gcode to be executed before the start of the print.

You can also, if you wish, create "start.g" in your system directory and put gcode there - the firmware executes "start.g" at the start of the print.

Frederick

[holco62]

@Phaedrux

I don't know where to find the rest

bed.g

[holco62]

Tomorrow is a new day, I have to go to bed now.

But thanks for all the help

[Phaedrux]

@holco62 said in when will the new Z-height actually be saved?:

I don't know where to find the rest

in the /sys folder along with config.g

[holco62]

This all I have in the System Directory

[holco62]

@fcwilt said in when will the new Z-height actually be saved?:

@holco62 said in when will the new Z-height actually be saved?:

@jay_s_uk

It looks that I don't have a start gcode in my System Directory, or I can't find it

Hi,

They are talking (I think) about the place in S3D where you can enter gcode to be executed before the start of the print.

You can also, if you wish, create "start.g" in your system directory and put gcode there - the firmware executes "start.g" at the start of the print.

Frederick

Made a start.g directory with a G32 file in it, but for the rest I am lost

[engikeneer]

@holco62 he meant create a file called start.g in your duet system directory (/sys folder). In that file, put the line:

G32 

To answer your other question on the files, please attach your bed.g and homedelta.g files from the system directory (i can see the file names in the screenshot)

[holco62]

@engikeneer said in when will the new Z-height actually be saved?:

@holco62 he meant create a file called start.g in your duet system directory (/sys folder). In that file, put the line:

G32 

To answer your other question on the files, please attach your bed.g and homedelta.g files from the system directory (i can see the file names in the screenshot)

Thanks

start.g is working, one thing though, it das the calibration with a gold bed/hotend, is there a way to bring up the temps first?

The bed.g and the homedelta.g files