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Hi, I was wondering if the ROBO R1 is able to print with semifelx TPE filament? If so how is the quality

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I’d be interested in knowing what filaments besides PLA and ABS that the Robo can print successfully.

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It can, but it’s a bit oozy. You have to run at 1/4rd speed with the stock arrangement (and it might still jam).

I modified mine and have it up to 1/2 speed (at 210c):

Remove hotend, remove springs and remove the hobbed bolt

Bore through the hotend down the filament path so that a PTFE tube from a Bowden extruder is a tight fit

Put in the ptfe Bowden tube, and hotend and trim to fit so that the entrance to the PTFE tube is *just* below the hobbed bolt and idler…

Reassemble. The small tube makes loading the filament more fiddly…

Other people had luck by putting a small ferrule (like from a ballpoint pen) on the filament to close the gap between the hobbed bolt and the bottom of the extruder, but I wanted a more permanent fix.

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I’ve had good luck with PET+ and T-glase in the past.

PET+ basically pushes the limit of what I’d set the Robo to in order to print though, at 250C on the hotend and 80C on the bed. On the plus side, no adhesives of any kind were required on the glass bed (do make sure it is clean though). Feeds and speeds comparable to PLA, just with the higher temps. The best thing about PET+ is that it is hydrophobic, so moisture is never a concern and you can just store it on a shelf (the downside is that it’s one of the more expensive filaments to get).

T-glase (or PETG if you buy it from anybody that isn’t Taulman) is basically the same story, except you have to slow wayyyy down to between 15-20mm/s on speeds to allow it to heat thoroughly in the hotend and then bond with the next layer while cooling (print thick layers though, fine layers don’t seem to work very well). People have had the best results with this modifying the Robo to use the E3D Volcano and one of the larger nozzles (like the 1.0mm nozzle and .8mm layer heights) to make vases and things.

Lately I’ve been having better luck with ABS than PLA, but that may be due to the high local humidity lately making the PLA brittle during long overnight prints.