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u2 skipping on a print


hawkview
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Posted · u2 skipping on a print

The skipping back like that means that you are printing more plastic per second than the extruder can handle. It's quite common (and usually ok) for it to happen on the first layer, if the bed level isn't quite right, because you are trying to force too much plastic into too small of a gap. But on higher layers, it will cause print problems.

What temperature, layer height and speed are you printing at?

 

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    Posted · u2 skipping on a print

    Just trying to print a object I made in sketchup setting is fast low quality setting on cura . I think it must be the print bed, because the print is not looking good, like it normally does.

    Will redo the bed levelling.

    Thank you for help.

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    Posted · u2 skipping on a print

    Fast low quality might be a bit too fast... try the bed leveling again, and if that doesn't help try running at normal speed. Or better yet, switch to full settings in Cura, so that you can get better control over the print parameters.

     

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    Posted · u2 skipping on a print

    Just to clarify - levelling the bed will *ONLY* reduce that skipping on the bottom layer. If you have that skipping on the second layer or higher, then you are printing too cold or too fast (or your printer is defective).

    50mm/sec at .2mm layers (4mm^3 of PLA per sec) should be possible at 230C but probably not at 210 or 220C (PLA is approaching viscosity of toothpaste as you lower temperature). You can only shove so much PLA through that tiny hole per second. It's important to have an understanding of how fast you can print given the layer height and temperature.

    There are test prints to see exactly how fast your printer can go:

    http://umforum.ultimaker.com/index.php?/topic/4586-can-your-um2-printer-achieve-10mm3s-test-it-here/

     

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