Creating a slicer profile for JobOx on Prusa MK3 manually

Since we not have (yet) prepared a profiles for all slicers available on the market, here is a guidance, so you can create your own profile.

Build space

The most important point of setting the profile for JobOx system is to ensure that printer only operates in the "alloved area" in the Y direction. Otherwise it will accidentally unload the build plate before finishing the print causing extruder collision or making the printing bad colliding with the magazine unit.

The maximum allowed operation area in the Y direction is from Y2 to Y206, resulting in 204mm building space.
The recommended operation area in the Y direction is from Y17 to Y206, resulting in 189mm building space.
There is no limitation in X or Z direction.

Classic (oldschool) way - two separate profiles:

You can creating two different profiles - one profile using the recommended build space (called "JobOx-189mm" for instance) and another profile using the maximum allowed build space (called "JobOx-204mm" for instance). The benefit of this way is that your preset will never allow you exceed the set limits. However in this case you hew do deal with two separate profiles in your list.

Alternative way - one common profile:

You can also download the picture above (right click > save image) and load it as build plate picture into your slicer (eg. in Prusa Slicer: Printer settings > Bed shape [Set...] > Texture [Load...]) .This will also give you an orientation where to place your objects to stay in the "safe" area. In this case you don't need to edit the printing area preset and there will be only one profile. This is definitely the easier way. However you will always need to pay attention to not placing your print in the red area while using JobOx.

For the best performance on JobOx we recommend using the 189 mm profile ( or a green zone). In certain cases when larger build space is needed, you can switch to 204 mm profile (green + yellow zones). This will work as well, however here we recommend to not using more than 4 build plates in the magazine.

Why two profiles (regions) and why is this important? [read more here...]

To maximize the build space the 204mm profile will allow building bad come quite close to the magazine so there will be a slight contact (rubbing) between the aluminum cover on the heat bad and the hooks of the next Puild Plate in the magazine. We expect that this rubbing could wear of the hooks after a (long) while and is more prone to malfunctions (compared to the 189 mm profile). So please stay with the 189 mm profile where it's possible and use the 204 mm profile only when needed.

Setup a profile for MMU

If you setup a custom profile for MMU you will need to adjust a parking position in the original Prusa End-GCODE. Find this line:

G1 X0 Y210 F7200 ; park

...and replace 210 by 205

G1 X0 Y205 F7200 ; park

This will prevent jobox.app from firing a warning because of exceeded limit of the GCODE.

Start- & end-GCODE

Since the JobOx functionality is GCODE based, the plate swap is initiated by a dedicated GCODE sequences which needs to be placed between the prints.

Please note: when you are using our jobox.app as an automation solution you don't necessarily need adding following sequences to your start and end GCODEs. Jobox.app analizes your loaded GCODE and add the sequences for plate swapping automatically if needed.

If you are using a third party print manager which allows a continuous printing, you will need to add dedicated start and end-sequences into your slicer profile.

Put following lines before the existing start-GCODE in your printer profile:

;--JOBOX_LOAD_BUILDING_PLATE_START-- ;V01-007_20231001_AB G91 ; jobox //set relative position G0 Z30 F720; jobox // lift the nozzle to avoid collision if it's to low G90 ; jobox //set absolute position G28 Y; jobox // Home-Y G28 X; jobox // Home-X G0 Y-4 F2000 ; jobox // hook into first slot G0 Y10 F600 ; jobox // pull a bit G0 Y206 F3000 ; jobox // pull until first step G0 Y180 F600; jobox //push out of the first slot G0 Y7 F3000; jobox //push into the second slot G0 Y40.5 F600; jobox //pull to the second step G0 Y20 F1000; jobox //push to the border G0 Y5 F1000; jobox //push to the border G0 Y-4 F300; jobox //push over the border G0 Y20 F300; jobox //pull out entirely G4 P40000; jobox // wait 40 seconds for temperature equalization - prevents thermal runaway ; jobox // placeholder jittering to preventing execute M140 command prematurely G0 X0.1 F4000 ; jobox // placeholder G0 X0.2 F4000 ; jobox // placeholder G0 X0.1 F4000 ; jobox // placeholder G0 X0.2 F4000 ; jobox // placeholder G0 X0.1 F4000 ; jobox // placeholder G0 X0.2 F4000 ; jobox // placeholder G0 X0.1 F4000 ; jobox // placeholder G0 X0.2 F4000 ; jobox // placeholder G0 X0.1 F4000 ; jobox // placeholder G0 X0.2 F4000 ; jobox // placeholder G0 X0.1 F4000 ; jobox // placeholder G0 X0.2 F4000 ; jobox // placeholder G0 X0.1 F4000 ; jobox // placeholder G0 X0.2 F4000 ; jobox // placeholder G0 X0.1 F4000 ; jobox // placeholder G0 X0.2 F4000 ; jobox // placeholder G0 X0.1 F4000 ; jobox // placeholder G0 X0.2 F4000 ; jobox // placeholder G0 X0.1 F4000 ; jobox // placeholder G0 X0.2 F4000 ; jobox // placeholder G4 ; jobox // finish moves M84; jobox // turn off motors ;--JOBOX_LOAD_BUILDING_PLATE_END--

Put following lines after the existing end-GCODE in your printer profile:

;--JOBOX_EJECT_BUILDING_PLATE_START-- ;V01-007_20230510_AB M106 S256 ;jobox // turn fan on to speed up nozzle cooling G92 E0 ; jobox //reset extruder G1 E-3 F100 ; jobox // retract G92 E0 ; jobox // reset extruder G91 ; jobox //set relative position G0 Z30 F720; jobox // lift the nozzle to avoid collision if it's to low G90 ; jobox //set absolute position G28 X; jobox //Home-X M109 S180 ; jobox // wait for idle temp before starting the unloading (prevents stringing mess underneath the sheet) M104 S165 ; jobox // set idle extruder temp G0 Y212 F3000 ;jobox // hook into first ramp G4 P1000;jobox // hold on G0 Y150 F200 ;jobox // lift the sheet G0 Y110 F400 ;jobox // pull the sheet G0 Y212 F3000 ;jobox // push and hook into second ramp G4 P1000;jobox // hold on G0 Y170 F300 ;jobox // lift the sheet again G0 Y45 F400 ;jobox // pull the sheet G0 Y212 F4000 ;jobox // push and hook to third ramp G4 P1000;jobox // hold on G0 Y120 F2000 ;jobox // slide the sheet down G0 Y212 F4000 ;jobox // push the sheet towards third ramp G0 Y92 F3000 ;jobox // slide the sheet down G0 Y205 F1000 ;jobox // jently push away G0 Y85 F6000 ;jobox // move back G0 Y212 F6000 ;jobox // push the sheet out of the operation area G0 Y100 Z0 F6000; jobox //get ready to hook the next sheet G4 ; jobox // finish moves M84; jobox // turn off motors M140 S0 ; jobox // turn off heatbed M104 S0 ; jobox // turn off nozzle ;--JOBOX_EJECT_BUILDING_PLATE_END--

This sequences will load an empty build plate from the magazine unit at the beginning and ejecting this build plate when printing process is finished. So when finishing one GCODE the printer gets ready for the next one automatically.

After you have setup your slicer, continue with our automation section to learn how you can print multiple files in a row automatically.

Continue with automation section