110mm calibration piece

by Sebastius, published

110mm calibration piece by Sebastius Aug 7, 2012


To make calibration easy, use this large easy to print piece. 110mm for x and y, 4mm height. All squares are 10mm x 10mm.

The difference to smaller calibration pieces is that you can find really tiny errors with this. I found a 2% error in my print, 3 mm at this size. A standard 20mm calibration cube would have given you a .4mm difference. Still measurable but a lot more difficult.

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very useful for fine tuning thanks!

Ah, I see. Here I thought these were all supposed to be decimal integer values for raw motor steps. Thanks!

You put it under Start G-code. That tells your printer to calibrate itself accordingly when printing that model.

My entire Start G-code says:

G28 ; home all axes

M92 X63.0242 ; calibrate X

M92 Y62.7669 ; calibrate Y

M92 Z2287.4147 ; calibrate Z

M92 E610 ; calibrate E

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Print, cool, measure, calibrate, print again, measure, calibrate again :)

Calibration is done like this

Get your X or Y calibration value from Slicer.

Measure the X or Y length of the piece

Use following formula

(110 x OldCalib) / Measurement = NewCalib

So my old value was 61.2555 for X and I measured 107.50mm.

110 x 61.2555 = 6738.105

6738.105 / 107.5 = 62.6800

So i now have a better calibrated bot!


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Badgerdelux on May 10, 2013 said:

very useful for fine tuning thanks!

SirGeekALot on Jan 17, 2013 said:

This was useful--thanks!

mechcem on Dec 1, 2012 said:

generally where are the calibration values within slicer?

ramai on Feb 24, 2013 said:

Hi Mech, i'm sure you've figured it out, but for anyone else wondering, these calibration values are found under Printer Settings --> Custom G-Code in Slic3r. Hope that helps!

gbmyers on Sep 19, 2012 said:

Thanks to this piece I've got my bot within 0.5%. Very useful.