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sprockett

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Posts posted by sprockett

  1. Hi guys,

    I have a UM1 and am facing an issue with hotend:

    --When i start print, I manually push up the temperature to 200c (controlled via laptop).

    --However, it usually takes sometime before it actually starts heating up. So on the temperature graph in cura, there will be a long flat line (at room temperature), then suddenly / randomly it will heat up.

    Sometimes everything will be fine. I raise the temp in CUra, and it heats up immediately.

    What's the best way I can I can trouble shoot to see what the problem is?

    Thanks!

     

  2. THANK YOU JHINKLE FOR THIS!

    I've been printing for 8 months with a VERY hard to move head. I was 100% sure that my printhead wasn't making my small rods exactly 90 degrees (because I was unable to get my large rods truly perpendicular), but everyone said it was unlikely that the printhead would cause that.

    I will try again now!

    Thank you...

     

    It squared nicely once I got the rods in the print head to be 90 degrees.

    I loosened the print head's clamping screws and the adjoining bolts. The print head was still a very solid and no flexing anywhere was perceived.

    Using my drawing of perpendicular lines and the rods as lever arms, I attempted to get to 90 degrees.

    I felt nothing move at all. but after a couple of times on the rods applying force in the correct direction, the rods measured 90 degrees. I felt no movement -- but it moved.

    With the print head rods now at 90 degrees I inserted the print head into the printer.

    Set belt tension and placed the alignment squaring tools.

    Perfect square!!!

    It only took 8 hours of pain and anguish figuring out root-cause and addressing it.

    Now that everything is square WITHOUT having side forces applied to the bushing in the sliding blocks -- the head moves smoothly.

    I hope this helps anyone else with a squaring issue. Be careful NOT to just force square by forcing and setting the pulley (as UM suggests) or you will not run smooth and your stepper motor will run hotter than required.

    Joe

     

  3. this spam looks automated... if so, simple tools

    like akismet could be added into the forum code to solve the problem once and for all, automatically.

    afaik, using akismet just requires adding a few additional lines of code

  4. it wasn't critism, more suprised that it can go as accurate as a lathe

    In the Z direction that is. The X/Y direction stil lay down ~0.4mm width lines, so you can get some "rounded" corners, but this isn't visible at all with organic models like the Yoda.

    Hi Daid,

    is the X/Y 0.4mm limitation due to nozzle size? Or is it due to stepper motor precision?

    Thanks!

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