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Calibration block - thin walls, overhang, bridge, holes

by goaran, published

Calibration block - thin walls, overhang, bridge, holes by goaran Jan 21, 2011
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Summary

This is a calibration thing, that i design to test my printer.
It has several features:

  • thin walls in x and y direction 4mm 2mm 1mm 0.5mm 0.25mm
  • Holes in different sizes r= 4mm 2mm 1mm 0.5mm
  • Overhang test with differnt slopes
  • Bridge test with different lengths
    the whole block is 50x50x10mm
    I did not test it with skeinforge but on repsnapper it works fine.

Instructions

print
look at it
calibrate your machine or something

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I printed out the calibration block using pla, for the most part it worked well. The only area my system had was were the smaller holes have been placed. Excess plastic started to build up in this area causing the tool head to plow through the material. It was deep enough to fully submerge the small extrusion portion of the tip causing a small piece of the Teflon coating to come off. I was still happy to see the end result, and plan to reference it for items which I plan to create.

i had some problems at the holes too.. maybe i will change the holes to bigger ones.. twice the size they are at the moment or something...

It might have more to do with the spacing of the holes. I have noticed build up of material on other items which I have placed the geometry too close to one another or too close to the edge of the object. In this case I think the creation of four holes in such a close proximity caused the excess.

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