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  1. Thanks, EM4. I've requested new Bowden tubes and couplers from my dealer.
  2. I have a new UMS3. I have tried printing dozens of jobs. Anything under four hours prints nicely, but it has never printed for more than five to six hours without pushing the Bowden tube out of the drive assembly. I have tried different models, different speeds, and different temperatures. I have removed the Bowden tube and trimmed the end. I have tried a different spool of filament. The elapsed printing time is different with each failure, but never less than five hours. The failure is at a different layer each time. T
  3. I'm a hobbyist tinkerer, and I'm selling my UM2+ so I can upgrade to a UMS3 to begin working with soluble supports. My UM2+ is well cared for and in great shape with new Bowden tube, new .80 and .40 nozzles, new PTFE coupler, and a BuildTak spring steel magnetic bed surface (this is a nice upgrade). It is incredibly reliable. Once a part is dialed in with the slicer, it prints perfectly every single time. There is a small chip out of the bottom rear corner of the right side panel, cosmetic only and not really noticeable (see photo), and a few of the LEDs are out.
  4. Thanks for the tip! I will try that. I'd still like to know if a flow rate adjustment of 140% is within the range of normal, or if I have something else going one.
  5. I have a UM2+ (upgraded from a UM2) that prints beautifully, but with the .80 nozzle, I have to set the flow multiplier in Simplify3D to 140% to get past underextruding bottom and top layers. I'm using 20mm/second speed and 0.40 layer height. I have never been able to get a print sliced in Cura because I can't adjust the overall flow rate up that high. Is this normal, or is it compensating for a problem somewhere?
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