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  1. removing the 4.7k resistor fixed the thermal readings, and replacing the Arduino Mega seems to have resolved the motor issue. Still more issues to solve on this UMO, but slowly getting closer!
  2. assuming the FW is stored on the Arduino Mega board, I am still using the right FW. (haven't replaced the Arduino yet, but I have one on its way). I did verify that my new shield board does have the 4.7k resistors that my original shield board does not. I hope to get more answers over the weekend. Thanks for your help, Gr5!
  3. no, I didn't get a new arduino with it, just the 1.5.7 board. I also haven't updated firmware on it, so it might have UMO+ on it instead of UMO. I will try that later today. the extruder driver wasn't good, but replacing it on the old board didn't fix the issue. which is why I suspected the circuit board.
  4. I've been having issues with the extruder motor on my UMO. The motor seems fine, as it is driven fine when swapped with another driver (i.e. plugged into the Z axis). It doesn't seem like the stepper motor driver is the issue, as swapping the driver had no effect. So I think it is my main circuit board. I bought a replacement on eBay from China. Plugged everything in, powers up fine, but the temperature reading on the UltiController says 120 before I've even preheated. Trust me it isn't that hot out this is supposedly a 1.5.7 ultimaker board. curious if they might have a different th
  5. anyone know the part # for the Ultimaker Original (UMO) Feeder Stepper Motor? Mine seems to be going bad
  6. I've heard some difference of opinion on exactly how to tighten the hot-end of an Ultimaker Original. The assembly manual says to have the nozzle flush with the aluminum block, and that the heat pipe above the block doesn't need to be flush, as long as both are tight. I've also heard the opposite, tightening the brass pipe so that it is flush, then tightening the nozzle. Which one is best? I'm still experiencing some extrusion issues, and want to get this right! -Derek
  7. after replacement of the thermocouple, and checking the filament (did snap test, filament held together), still having extrusion issues. suspecting the feeder again... *SIGH*
  8. fair enough. I will give it a try, but I've had similar issues with other spools as well
  9. this is a brand new spool of Ultimaker filament...
  10. thanks, Erin... your company has already mailed a replacement I really hope this solves the problems I've been having. The ONLY thing I haven't replaced in the hot end now is the heater itself...
  11. Using a temperature probe, the original thermocouple had wide swings of variance. Tried replacing with a new thermocouple, but the diameter of the thermocouple replacement was quite a bit larger than the hole in the aluminum block, so I can't get the sensor fully into the block...
  12. still having major issues, the feeder itself seems fine, can push filament without the hot-end in play... after I've cleaned the nozzle, atomic-pull, etc, a print will go fine for the first couple layers, then the print will get less and less dense until it finally stops extruding anything from the nozzle. I've replaced just about everything in my UMO hot-end. Nozzle, Aluminum block, PEEK, brass pipe, PTFE coupler... I'm wondering if my thermocouple might be bad - is there any way to diagnose this? it is just about the only thing I haven't replaced! really need help here, as I'm getting
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