Large prints and collision with ptfe tubes
Hi, I’m printing with an MK4 with MMU3 and Prusa enclosure. Today, I’m printing a 20x20x20 cm box (first time I’m doing such a large and tall print, it probably fit almost the maximum dimension printables wich is 25x21x22) and I noticed that towards the end of the print (I think around at tall of 18 cm, with 1 hour left from 18 total), the box started to collide with the PTFE tubes that enter the MMU3 and the power cable of the extruder. Basically, every time the bed moved back, it collided with the tubes. Since the MMU3 has an inclination of about 45°, I was wondering if this inclination is necessary or if it is possible to print mounts with less inclination so that the tubes do not interfere with the printed objects. I should mention that I have a homemade PTFE tube attachment with pneumatic fittings to be able to detach them when I take the printer out of the enclosure, so probably, compared to the original configuration, the tubes are 1 cm lower, which is the size of the fittings.
Someone of you had the same problem and they solved it? how?
Thanks for your answers
Antonio
RE: Large prints and collision with ptfe tubes
There are tradeoffs to keep it all in the Enclosure and access the full volume of the print bed. There are multiple mods that move the MMU3 horizontal. The problem is the Nextruder can then bind the PTFE tube at full Z. I found I had to raise the MMU3 and move it back. I made this mount.
I also use a guide for the 5 tubes going into the MMU3 also. It keeps the tubes straight as they enter the MMU3. To help loading and feeding filament.
RISPONDI: Large prints and collision with ptfe tubes
Thanks for your advice
regards
Antonio