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conny_g last won the day on September 4 2018

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  1. You mean within the Bondtech extruder? Check with them if they have a replacement part for that. I think to remember they have a 3d model of their housing, then it would be possible to reprint it. But I would assume the resin 3d print is sturdier than a FDM print. And still I think that there is too much force on the extruder for some reason.
  2. Never heard of extruder motors dying. I bet the root cause is somewhere else. Worn bowden tube, bad / jammed nozzle, bad part in the print head. Or simply too much motor current so it overheats, ...
  3. Hi TrevDog, the board in UM2 is actually identical to the UMO board v1.5.7 in the technical layout, just much nicer on one PCB and more beautiful. And the UMO board has the same structure than the first UMO setup with Arduino Mega 2560 https://www.3dprima.com/de/ersatz-und-zubehoer-teile-3d-drucker/ersatzteile/ultimaker/ultimaker-original/a-20949 and a motor shield Something like this here: https://www.amazon.de/Controller-Schrittmotor-Treiber-Heatsink-Grafik-Smart-Display-Controller-3D-Drucker/dp/B01NCZ09Q5 In other words: UMO and UM2(+) board ARE some sort of Arduino. And yes you need a powerful power supply for the motor shield and hotends. Delivering 19-24V and 1-2A per Motor plus heater plus hotends.
  4. It’s the UM holes I cut out and both do fit, the UM holder and the iRobert one.
  5. Yes, that's the mount of the UM2 spool holder, so you can put any holder that fits this. And yes, it's iRobert's spool holder, one of the long versions, 80 or 90mm. https://www.youmagine.com/designs/low-friction-um2-spoolholder
  6. I designed and I am using this: https://www.thingiverse.com/thing:2183950
  7. You are right, you need a nozzle for 1.75. Otherwise the filament would be pressed upwards again and build out a big blob between bowden tube and nozzle, which you can't remove anymore as the blob is thicker than the bowden (given that's changed to 1.75).
  8. Flex wedge I would use 100%.
  9. The oozing issue of the blue filament could also be a temperature overshoot when heating up the new active nozzle. Using OctoPrint I have noticed that hotends tend to overshoot 10-20C on heatup and it takes 15-30s to get back down. A prime tower also helps this issue as the head will print the tower for 10s instead of your model and it has time to get down to the right temperature. The oozing happens at the prime tower instead then. But in fact different filaments have different viscosities (is that written correctly? Looks strange) and not only the optimum printing temp, that could differ 10-20C, but also the curve how fast they become liquid. I have one PLA that I can’t print with higher temp for higher speed because when setting it 10-20C C higher it’s to liquid to print nicely and oozes. So it might be both for you. Overshoot and 10C too much temperature.
  10. I have now ordered Duet3D Duet 2 1.04 Wifi Board and two PT100 adapters (for 2 extruders) and hope to have the time in the next months to convert one of my printers. Yes, months... too much work, too many projects, currently. 😞
  11. My learning in above mentioned thread was that you need the ventilation of a powerful (= high static pressure) 120mm fan. If you drill holes in the circle of 120mm the net opening is like 35-40% of the area of the 120mm fan, that's enough. 120mm circle: 60^2 x pi = 11.309 square millimeters. 60 holes of 10mm (= 78 square mm) = 4.680 sq mm or 41%. If the vent opening is much smaller on one side (in or out) then the airflow is not enough to keep the temperature < 30C , temperature rises, PLA gets soft, feeder jams. And obviously there could be problems with motors heating too much or the electronics as well. I have done a test with ABS where the cabinet temperature reached 40 C and that was ok, though.
  12. @neotko @tinkergnome Thank you! I think now my concerns / uncertainties are flushed out and my curiosity rises and I feel like ordering a duet board to put next to the printer for the mod as soon as I have time for it. Regarding power, I have upgraded my two printers to a 15A PSU from Aliexpress, not having any issues with printer crashes any more, although I have the power budget set to 350W. So I think that’s not an issue.
  13. What kind of issues do you have when wanting / trying to print something? Just go ahead and tackle every symptom you experience and after a few rounds of doing so your printer will be plug & play. For most issues you will find resolution paths here in the forum.
  14. Stronger grip due to two grip wheels, better/sharper teeth. And I remember I thought the sound was more pleasant. But that's 2 years ago or something, not completely sure about that.
  15. @neotko Currently using the tinker firmware. How does that compare with the duet firmware? And I use the magnetic tool changer dual mod, is that possible with the duet firmware and how do I implement it there, you mentioned macros?

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