Using merge with MMU3 on MK4/S  

RE: Using merge with MMU3 on MK4/S

Without your project it’s impossible to be sure. However I suspect your ‘merge’ has made them both a single object. You can assign different extruders to a single object. You could try using split to parts to separate them again. You basically need them to be a multipart object. So one object made up of different parts. Those can have different extruders assigned to them. 

remember if you want to attach a PRUSA slicer project you will need to zip up the 3mf file. 

RE: Using merge with MMU3 on MK4/S

Thanks for looking.  It seems that merge should honor the different toolheads if it let one set them.

One disk/text set is not merged, one is merged.

Text.3mf

RE: Using merge with MMU3 on MK4/S

Ok with your example you have 2 PARTS occupying the same space, of course the gcode paths are going to conflict.  Parts in capitals on purpose.  IF you want to do it that way then you have to cut out the space for your text element.  Thats the Hard Way in the attached modified project example.  

Have a look at the attached modified version of your project.  Notice the text is added twice.  Order in the list is important.  The first text instance has been changed to a negative space so it 'cuts' out the space from the disc.  The second instance is the text so its fills in that area and we no longer have conflicting gcode paths.

The second one is the easy way.  You had them both as PARTS.  Parts are physical things and get printed, hence the overlapping paths.  By changing the text to Type Modifier and then assigning the extruder to it you have making it a Modifier to an EXISTING part.  No conflicting paths.  Order is still important.

If you have any questions then ask.

RE:

In the Two object (your merge), you don't need to cut the text from the cylinder. Just change the order. I dragged the "two" text to before the cylinder within the merge and PrusaSlicer did the masking for me. Here is the result: (I didn't touch the One text and cylinder.)

Text_TwoFixed

I often use this trick to fill in text and symbols on the bottom of existing models (for example Prusa printer parts). I add a part (assigned to a different extruder) to the object and make sure it is second on the list so the original part cuts/overrides my added part only allowing it to print where the original part isn't (i.e. the embossed text/logo). I have several remixes of Prusa parts on my Printables profile (link in signature) for the MK4 and the enclosure, but haven't gotten around to uploading the ones I did for the MK4S parts. Once Prusa publishes the CORE One parts, I'll probably do the same to them.

RE: Using merge with MMU3 on MK4/S

Thank you both so much for your attention!  

I didn't choose the order of the parts, I just selected them and merged.  I don't quite understand how the order matters, and I didn't know you could reorder at all!  But I now see how easy it is!