Le problem? it’s all 6mm beltsĪll of the CoreXY designs I found use 6mm GT2 Belts - these belts are fibreglass backed and have quite a lot of stretch in them, this stretch is more dramatic on a CoreXY because the belts are a lot longer. With the CoreXY layout, the stepper motors can be outside of the heated chamber - that I plan to build. Stepper motors also generate quite a bit of heat and don’t operate well when they are really hot. Stepper motors are a little bit heavy and removing this weight from the carriage reduces the start/stop acceleration “ringing” ( explanation here) you get from changing the motion of the stepper motor mass.
#Hemera volcanic belt trial
A lot of people online are using 2020 t-slot but 3030 is more rigid and this printer is going to be a bit big and move fast so longer sections will flex more than I’d like if I used 2020.Īfter toing and froing quite a bit, I settled on a frame size of 530mm wide, 500mm deep and 600mm high, this was after a great deal of printing trial parts and guessing about clearances. The build : The frameĪll of the frame was made of 3030 t-slot which is very common in 3d printers. Retractions and hops weren’t as predictable and flex filaments, especially the really soft TPU I have simply doesn’t work well… Considering my main reason for going with the bowden was for speed and the new nozzle size essentially means I am going to print slower, it just seemed to not matter anymore. Why the change from a bowden tube to a direct drive? I tested the bowden tubes a lot and I just didn’t like the outcome. For a number of reasons this was what I’d been looking for, so I held off.
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