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Ultimaker Community of 3D Printing Experts


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  1. thank you for the fantastic manual! it really is a tremendous improvement. I now also upgraded the e driver. while you still hear retraction quite well, the main noise source now is my print head fan (which is amazing!)
  2. yes, the nice alu ones are way too big. the other ones are not in stock right now, they would probably fit, though...
  3. hi tommy no worries, I mounted the sinks correctly. I meant the sinks I ordered don't fit into ultimakers fan 'channel' design (the plywood that channels the cooling air over the stepper boards). I might have to redesign that part anyway though... I'm using this design at the moment: https://www.youmagine.com/designs/ultimaker-replacement-electronics-fan
  4. hey tommy thanks for your reply! You were right, voltage was way too high. I recently changed my electronics cooling to 2x40mm fans. It seems even a VREF of 1.25V caused the drivers to overheat. I have now tuned them back to around 0.85V and printing is flawless, at least for a 30 minute print. I'll now try a longer print and see wether I might have to improve cooling. I also just reused the heatsinks of my old drivers because the aluminium ones I ordered were too high . I'm now incredibly happy with my setup, direct drive, GT2 and the new drivers make a huge difference to my printing experi
  5. the chips are now tuned to around 1.6V (turning the potentiometer clockwise) and my printer is now actually behaving worse. How can that be? I followed the instructions really closely, MS1, MS2 and MS3 are disconnected, the firmware updated correctly. My first test print is perfect until the moment when I lost lots of steps. has anyone of you got a clue how I could solve that? maybe it has happened to someone else, too? asmentioned, the mechanics of the printer are flawless (imho).
  6. never mind. I misread, VREF should be a bit over 1.6V, I'll try later and come back with the results
  7. I finally installed my silentstepsticks and so far I'm quite happy with it (especially the noise or lack there of!). my x-axis was acting up though during a test print. I have two shifts of around 10mm, once to the right and a little later to the left. What could be the cause of this? I have just installed direct drive and GT2 belts, movement is butter smooth... maybe a faulty chip? any ideas? VREF is set to around 1.3V right now. Can it be too high?
  8. hey daid, I'd love to take the new cura for a spin as well... regular dura user in the area of architecture/prototyping.
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