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Showing content with the highest reputation on 09/24/2016 in all areas

  1. Funny, there are definitely several ways to look at the same problem, kind of "chicken and egg" situation... I personally would say that a "perfect" nut does not exist (some amount of play is essential for the screw to run through the nut). So what you want is to lower the play in the nut to well below the layer resolution of the printer (for Ultimakers with 40 or 60 microns layers, I guess this translates to nut/screw tolerance below 10 microns or so... Clearly, the original Ultimaker parts do not reach this level of tolerance. I have no idea what the standard industrial tolerances are for s
    2 points
  2. Juste un petit Yoda de 20cm de coté ^^ téléchargé sur Thingiverse Colorfabb pla 0.2mm remplissage 0% (j'aurai du mettre 10 au moins) 21 heures d'impression PS: je prépare mes cadeaux pour la Noyël c'est bien une um2 ça fait des cadeaux originaux
    2 points
  3. Unfortunately, from France I have not been able to order from Misumi without a company ID. I haven't tried to order from Misumi US but as you say the shipping costs are likely to be a rip off (assuming they ever accept to ship outside North America). Anyway, I'll remember to check that possibility: after all I already uselessly invested in a couple of costly Igus polymer bearings which did not fit well and only made the situation worse ;-). About exercising the bearings: in my case, I made several runs over several days (probably cumulated about the equivalent of one continuous hour exercise
    1 point
  4. What I do instead of something like the Filcatch is just add a couple lines to my start gcode that causes the nozzle to drag across the build platform at the start before printing. At times, I have placed a small ridge of painters tape to drag a cross to shear the the excess plastic from the nozzle on the way. Something like this (for UMO) at the very end of the start Gcode moves the platform back to the nozzle at X=5, Y=5, Z=0. From here it goes into the sliced model Gcode which starts at the same level thereby dragging from 5,5,0 to the beginning of the print. When the print starts, all t
    1 point
  5. Looks like yet another case of sticking in the vertical linear bearings / rods. Short suggestions to remedy: add some weight (500-1000g) on the platform between the rods, wipe off any lubricant off the Z-rods (they should be dry and non slippery), remove the linear bearings and exercise them (a lot) by running them back and forth along the rods until the motion feels smooth and rolling (no skidding). If you find a good source of components, you could also try to replace the linear bearings with higher quality parts (Misumi parts have been recommended by some). See here (for example, but the
    1 point
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