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Customized QU-BD TwoUp Issues #1 – Heat Bed

Posted on June 25, 2014June 25, 2014 by Ianmcmill

Hello dear reader

on a constant basis I want to write about the issues and design imperfections of my QU-BD TwoUp 3d printer. There are a lot of issues which I try to fix and posts the findings and results here.

So off we go with an issue that from the first look does not look that of a problem.

The heat bed

The heated bed is a piece basalt with a heat pad glued to the bottom. The heat bed itself resides on a cut-to-fit MDF piece with 5.6xxxx mm thickness. Damn those non-metric measurement.

1) Under the weight of the basalt bed the MDF piece deflects.

Solution: Replace MDF with aluminium or strong acrylic glass piece.

2) Heat pad is glued not aligned to the basalt bed. The cut-out middle section in the MDF therefore distorts the whole basalt bed. The holes in the MDF piece which are used to secure the basalt bed are off. Way off. Being slightly twisted, the heated bed is not aligned nice with the Y and X axis hence reducing the print volume slightly.

Misaligned heat bed
Misaligned screws
Heat pad misaligned

Solution: Remove heat pad and realign it.
Solution 2: Sand of parts of the MDF so that the heat pad/heat bed can be aligned with the x/y axis.

Do it! :

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