MMU2: Soluble Support and NON-SOLUBLE raft possible?
Hello,
I'm printing with a Prusa i3MK3S + MMU2. My models are relatively small (X x Y x Z = approx. 2cm x 4cm x 2cm), but have much detail.
I get good adhesion with PLA on the heated bed @ 60°C. But it's easy enough to remove the print without damaging it.
With PVA as soluble support I get very poor adhesion directly on the heated bed. When I coat it with gluestick, then the adhesion is so good, that I damaged the printed part when removing it. Bending the spring steel sheet does not help much as the PVA layers are relatively soft compared to PLA and don't break away from the spring steel sheet.
I would like to print a raft with 5..10 layers of PLA attached directly to the bed (good, but not too good adhesion), then some PVA as soluble support (--> easy removal of part) and the rest of the model with PLA + PVA as support as normal.
Is it possible to create this two-material-raft in prusa slicer? If so, how to do this? 🙂
A workaround could be to model a solid slab underneath the model with some airgap in between and to print without a "normal" raft..
With kind regards
Christian
RE: MMU2: Soluble Support and NON-SOLUBLE raft possible?
I apologize for the half ass answer as i am new to this,but i understand if you change the settings in slicer to use PLA as the support structure and use the PVA as the contact interface only then it only has to dissolve a small amount "and use" and you wont get any contact issues with the heat bed
GOTO:
print settings/multiple extruders/extruders/support material,raft interface extruder: "set to the extruder using PVA"
that should allow you to make easy removal of supports.
RE: MMU2: Soluble Support and NON-SOLUBLE raft possible?
I think the easiest way to solve this issue is to use the glue stick. Don't try to break it free from the sheet. Instead rinse the whole part together with the sheet with water. Just make sure after you've cleaned your sheet to dry it and maybe heat it up to 100C. That should prevent any rust.
Often linked posts:
Going small with MMU2
Real Multi Material
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