What G code to try out Z offset when Z0 against heatbed before print?.

Crille

Hey all

Is there any G code used to test
the distance from the nozzle to the heating bed ?.

I have been looking for it, but I may have missed it in everything.

I would like to know that the nozzle goes down so you just get a piece of paper
under the nozzle.

As it is now, the nozzle goes into the heating bed, even though I have made all the settings
and uses IR sensor.

I have one kossel printer with duetwifi FW1.20 and IR sensor from same maker.

Thanks in advance.

dc42

To measure that distance, you would need to detect when the nozzle just grips a piece of paper. How do you propose to do that?

The recommended way of finding the trigger height is:

1. Lower the nozzle in increasingly fine steps until it just grips the paper.
2. Send G92 Z0 to define that height as Z=0.
3. Use the jog buttons to raise the nozzle 5mm, and remove the paper.
4. Send G30 S-1

The S-1 parameter tells the firmware not to reset the Z=0 level but to report the height at which the probe triggered instead.

Crille

@dc42:

To measure that distance, you would need to detect when the nozzle just grips a piece of paper. How do you propose to do that?

The recommended way of finding the trigger height is:

1. Lower the nozzle in increasingly fine steps until it just grips the paper.
2. Send G92 Z0 to define that height as Z=0.
3. Use the jog buttons to raise the nozzle 5mm, and remove the paper.
4. Send G30 S-1

The S-1 parameter tells the firmware not to reset the Z=0 level but to report the height at which the probe triggered instead.

Thanks for info

Did try it but still when it will start to print it go down in heatbed and scraping the nozzle.

I have G32 i startcode before it start to print.

What is it i do wrong?.

Crille

2.24 is when ir probe gets triggered, this value i have in config.g also..

Can it be config-overide.g that make this problem?..

Start to think i have forgotten something when i make files.