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I am trying to print a model that has (at the start of the print) several small parts attached to the bed. Some of these parts have bed contact 2.5mm x 20mm.

After a few layers, if there are any imperfections in the previous layer, the hotend is bumping the imperfection and knocking the part loose.

I am using a genuine Prusa i3 Mk2s with Filaform PLA. I am slicing with PrusaControl and using the "Generic PLA" settings, which is giving me 215/210 degree hot end (first/other layers), and 55 degree bed. I have the fan enabled. The print bed is clean and dust free

How can I improve bed adhesion for these small parts, ideally without adding brims etc?

Thanks

AndrewP
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3 Answers3

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One technique is to add your own custom brims to the model. A couple of "Mickey Mouse ears", attached to each end of the piece, may be enough to keep it in place (and will also be easy to remove).

Mick
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First off, in my experience 215 °C printing temperature is very high for PLA. Try using 200 - 205 °C.

And whatever you are printing, I can't see why brims would be a problem. Use a sharp knife to remove them afterwards. As you described the parts are thin and long, which increases heat contraction. Brims are essential for this.

Markus Appel
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My low-tech solution is to smear on some school/craft glue-stick. This is so quick and so easy yet it has saved me so many times from going any further troubleshooting adhesion problems.

My answer to a similar question describes this in full.

gbe
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