Quick demonstration of using PETG (red) as a surface-to-surface support material for PLA (white) using a single extruder (230c constant temp).
Purge tower removed, but 60mm^3 purged for each tool change.
PETG bonds lightly with PLA, and at 230C, only slightly more to itself.
Interfaces required a slight pull with pliers, but detached cleanly at the PETG/PLA boundaries.
The slight red at the bottom of the white rings is excess red PETG pigment that was flushed out after the toolchange.
I’ve messed around with bonding PETG to PLA like this. I ran it under some cold water and it immediately delaminated.
The tool change is awesome though!! Can’t wait to get my 2in 1 going when I finish up the delta. Keep up the good work!
Yeah I’m seeing a lot of excess dye in my PETG as well. Not so much with staining my hotend and therefore the next filament I print, but when I clean my BuildTak with alcohol and a paper towel, the paper towel is stained. What brand are you using?
Fascinating idea. What gave you the idea?
@Adam_Steinmark about a year ago I was playing around with 2 hotend dual extrusion, and had tried to make a PLA part with PETG hinges (for wear properties), and it came apart at the PETG/PLA boundaries.
Ergo - PETG as a contact support material.
Nice one. Although they are not dissolvable, it certainly gives rise to the thought of trying something similar with ABS that can easily be dissolved out with acetone.
@Dani_Epstein I could see ABS as a support for PETG, but I think the temperature differential between extruding PLA and ABS may be too large.
But I would love to see the results of your experiments!
