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3DSkip

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    4
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  • 3D printer
    Ultimaker 2 (Ext
    +)
  • Country
    AT
  • Industry
    (Product) design
    Engineering
    R&D / Exploration

3DSkip's Achievements

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  1. Everything solved now - thank you for the support! Here is what I did to make the new printhead work properly: 1.) I kept the limits witches at place and just changed the X_MAX_POS from 230 to 206 and Y_MAX_POS from 225 to 210. I am working with the alternative software recommended above (tinkerGnome's version of Marlin). In addition I changed the printhead and extruder settings as attached - now the center is exactly in the middle of the glass plate. 2.) I figured out what the problems with the fans are about and I found the answer here: https://drucktipps3d.de/lueftermotoren/ The alternative printhead head was equipped with two 12V fans which do not allow a serial connection. So I bought 24V fans and put them in parallel. Now it works. One thing to remark: the serial connection of the fan (12V) works as long as one fan is the original UM2 fan. With the two fans (12V) delivered with the alternative head it did not work. The alternative fans are electronically switching the power on/off which does not allow serial arrangement. Anyhow I consider a parallel arrangement as the better solution. Finally I am very happy with the new solution - thanks!
  2. Hello again, I managed to get marlin running on my UM2 with the new printhead. The head is now not any longer hitting anything. Thank you! Marlin is a great software, in particular the PID temperature auto tuning is very useful for my new printhead and was a positive surprize. I am only facing one more issue: the two fans for the print cooling are not working. When I directly feed them with power they are working. But not when they are connected to the board. In cura I have set the fans "on 100%" from 0.4mm layer thickness - but they stay off even above 0.4mm (though marlin is showing 100% on at the display). Any hints would be welcome.
  3. Thanks a lot for the quick response! I will check it out and will share what I have learned (which will take some time...).
  4. Hello, I am trying to get an alternative printhead which allows high temperature printing to work in my UM2. Since my new printhead has other dimensions and is a bit larger compared with the original UM2 head, I have set the printhead settings in Cura according to the new printhead dimensions. So far everything ist fine. But I have two issues: 1.) What is not clear to me is the question if I have to tick the box "origin at center" in the printer settings and what this really does when ticking this box (the original UM2 has neither a tick in this box, nor an extruder offset in both directions). When looking at the original print head, the nozzle is not below the crossing points of the axes - so what is this setting about? 2.) However, my main problem now is that when trying to calibrate the build plate, the head hits the right printer wall, which is no wonder because the printer firmware does not know about the changes done in the Cura print head settings (I guess the changes in the print head settings in Cura are just considered in the new gcodes generated with these settings, but of course not at all in the UM2 firmware). Or do I only have to reload the UM2 firmware with the new renamed printer with the new print head settings activated in Cura? So I would be happy to learn, how to do a proper build plate calibration avoiding a collision of the head with the printer wall or how to consider the different printhead dimension in the UM2 firmware to avoid the collision of the head with the printer wall. Any help would be highly appreciated.
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