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Posted · Feed rate issue

I keep having feed rate issues. The knurled bolt keeps eating away at the material. I cant even print anything with out it happening. I have tried cleaning the bolt, two different materials from two different manufacturers, helping feed it, different temperatures. What am I doing wrong?

thank you for the help.

Rob

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    Posted · Feed rate issue
    I keep having feed rate issues. The knurled bolt keeps eating away at the material. I cant even print anything with out it happening. I have tried cleaning the bolt, two different materials from two different manufacturers, helping feed it, different temperatures. What am I doing wrong?

    thank you for the help.

    Rob

    Hi Rob,

    - If the tension screw is too tight, the filament will eat away at the material. Check out the following videos from Jeorgen....

    Filament pressure:

    http://db.tt/zVcKL9q0

    Bolt tightening:

    http://db.tt/j95qMlaQ

    Filament-Bowden-Peek transition 1:

    http://db.tt/FVAU7hiH

    Filament-Bowden-Peek transition 2:

    http://db.tt/Ag7OpbbT

    Filament-Bowden-Peek transition 3:

    http://db.tt/Kd3kPPrg

    - If the diameter of the filament is greater than the inner diamter of the bowden tube, you will get a jam at the cold end. I had

    this problem with the stock UM filament (silver one) that i received with the kit. Also, if the bolt eats away at the filament, it can deform it, thus causing a

    jam at the cold end

    - Are you printing at high enough temperature? The temperature reading that I get is off by 25-30 degrees (which tested with a multimeter). So when I

    was printing at 205 degrees (it was really about 180 degress) which was causing very little extrusion and filament stripping at the cold end. Eventually when I was printing at real temp of 220-225 then things started to flow better..

    - Is the hot end of your bowden jammed? If your fialment diamter is the right size..and at a high enough temp( 230 degrees) can you easily

    push the filament manually? If not, then your hot end of the bowden might be jammed..

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