Leveling fails for Slic3r model, but not included models  

Re: Leveling fails for Slic3r model, but not included models

Hmmm... The calibration is done from code in firmware, just by executing a G80 command, and should not change with your slicer.

Thus, something else is different.

Can you send the Slic3r settings you used? Especially the GCODE setting for the start of print.

Re: Leveling fails for Slic3r model, but not included models

Thanks. I'll grab it from the SD card tomorrow. It's in my classroom.
In the meantime I have been trying to work out the ins and outs of slicer - another test .gcode I exported set the bed temp to 0 and extruder to 180, even though I didn't change any of the settings.
The custom gcode header block in Slic3r is this:

M115 U3.0.12 ; tell printer latest fw version
M83 ; extruder relative mode
M104 S[first_layer_temperature] ; set extruder temp
M140 S[first_layer_bed_temperature] ; set bed temp
M190 S[first_layer_bed_temperature] ; wait for bed temp
M109 S[first_layer_temperature] ; wait for extruder temp
G28 W ; home all without mesh bed level
G80 ; mesh bed leveling
G1 Y-3.0 F1000.0 ; go outside print area

Is there a setting or code to override the z offset maybe?

Re: Leveling fails for Slic3r model, but not included models

That is the correct settings.

It sounds like you have some strange settings in Slic3r. Maybe reload it from the PRUSA Drivers page, and do a Load Config File ... to load the .ini and see if that helps? Maybe something got corrupted.

Re: Leveling fails for Slic3r model, but not included models

There are several .ini files, I'm not clear on which one(s) I need to load - there's
slic3r.ini
simple.ini
Original Prusa i3 MK2.ini
then all the print and filament ini files.

I hoped when I hit Load Config Bundle it would know what to load, but it still asks for a specific file.
Ed

Re: Leveling fails for Slic3r model, but not included models

After double checking all the gcode settings in the print file, it is printing fine.
I still have no idea quite why the mesh bed leveling would work from the menu and the sd card, but not from a slicer produced gcode. The only thing I can think is that is the bed temp was set to 0, it might have cooled down such that any filament dribbling from the nozzle makes more of an obstruction. But for now it's working.

Re: Leveling fails for Slic3r model, but not included models

There are several .ini files, I'm not clear on which one(s) I need to load - there's
slic3r.ini
simple.ini
Original Prusa i3 MK2.ini
then all the print and filament ini files.

I hoped when I hit Load Config Bundle it would know what to load, but it still asks for a specific file.
Ed

Ed,

In the PRUSA release on their drivers page, they have two .ini files that come with the distribution.

http://www.prusa3d.com/drivers/

mk2_Slic34_prusa3d_1.8_0.ini
mk2_mm_Slic3r_prusa3d_1_8_0.ini

The MM is for the multi-material upgrade, the first one is for you.

The fact that you are not seeing these makes me think you are not pulling from the PRUSA site, and this will have you start with bad initial settings.

Good luck.