Topics created by simonboydfoley

You can only change the heater protection settings using M307. If you want to set the patameters manually, see duet3d.dozuki.com/Wiki/Tuning_the_heater_temperature_control#Section_Setting_the_model_parameters_manually.

Thanks for sharing, glad it's fixed!

@simonboydfoley said in Z Offset + ABL + Mesh Bed Leveling: What am I doing wrong?:

G1 X10 Y40 Z0 F1500

Don't use Z0 to do the nozzle wipe, try e.g. Z0.1 or Z0.2.

The parts you quoted from the GCode wiki at reprap.org are in the section headed "RepRapFirmware 1.09 to 1.14 inclusive", so they don't apply to current or recent firmware versions. From that same wiki page:

"RepRapFirmware 1.15 onwards

In RepRapFirmware 1.15 and later the M301 is supported as described above, but it is not normally used. Instead the heater model is defined by M307 or found by auto tuning, and the firmware calculates the PID parameters from the model. An M301 command can be used in config.g after the M307 command for that heater to override the firmware-computed PID parameters."

The G31 Z parameter should be set so that Z=0 corresponds to the nozzle just touching the bed or just gripping a sheet of thin paper. This does not depend on the layer height you want to print at. When your slicer wants to start a print with a first layer height of 0.2mm, it will send G1 Z0.2 at the start, before it starts extruding. If you actually want the nozzle to be at only 80% of 0.2mm at that point, that can be configured in the slicer.

flipping heck! In the BL Touch documentation I was directed to it failed to mention a vital piece of information.

Note there are two Z End stop Pins;

Z Stop (Normal)
Probe Molex Socket End Stop Pins (Z Probe In & Grnd)

If you have normally High End stops defined you have to have specifically set the Z End Stop to Probe in a separate line stanza ;

; Endstops
M574 X1 Y1 S1 ; Set active high endstops
M574 Z1 S2 ; Set z probe endstop

Previously I was thinking that I had to disable the normal Z end Stop to stop it overriding the Z Probe End Stop;

M574 X1 Y1 Z0 S1 ; Set active high endstops

when that did not work I thought ,,,, well maybe the code is overloading the normal End Stop GCODE and you had to set it to normally High and not disabling it;

M574 X1 Y1 Z1 S1 ; Set active high end stops

This did not work and because it was set to normally High and the Z Stop was not connected ..... therefore the printer always thought it was at Z=0!

You need both;
M574 X1 Y1 Z0 S1 ; Set active high endstops
M574 Z1 S2 ; Set z probe endstop

This is the problem with RepRap ,,,, you are left guessing at what the developers had decided to implement and when you have poor documentation ... it causes chaos !!

Bad RepRap Firmware 🙂

Yes the low end/high end refers to where the nozzle is when the endstop switch is triggered.

If the E1 output is free than I suggest you connect the second stepper motor to E1, to avoid having to buy new motors. Then put M584 X0 Y1 Z2:4 E3 in config.g, before any M350 or M906 commands.