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Fixing nubs


Dweldz
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I am getting 'nubs" in various places on prints.

What is the official name for these by the way?

If I print the same model in the same bed location and orientation I get the nubs in the same places from print to print.

I got net fab and examined the STL model for flaws the model showed it was good.

I ran the check for flaws and not a single one came up.

I couldn't see any thing in the mesh that was protruding in the nub area.

I haven't gone through and tighten belts as they seem to be just as tight as the day I got the machine.

Any wisdom would be appreciated.

Thanks20160221_083959.thumb.jpg.ce082102237402a046bd32c54e11bfc8.jpg

20160221_083959.thumb.jpg.ce082102237402a046bd32c54e11bfc8.jpg

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    In the past I have found the following to help with this

    run the walls at 1.6

    slow down, say 30mm/s

    set your speeds the same, so infill/inner speed/outer speed as all 0 and print speed 30

    run as cool as you can. I was testing a new filament today and started at a temp of 200 which looked fine but I dialled it down in steps to 180 which also looked fine and I chose 185

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