1 Topic by HyruleJedi86

  • HyruleJedi86
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Topic: Calibration Fail Davinci Junior

I recently printed a part that is eventually going to go into a lightsaber. The part is round but ended up with two flat spots opposite of each other instead of being perfectly round. The part is about 1" in diameter so I would think it would print it with no problem. I was having bigger issues previously with the filament feeder clicking and prints not laying down properly but fixed all that with the new printhead and z offset adjustment. As far as getting things to print correctly I did some more googling and found a few more things to check/calibrate.

So far I have:

Tightened the X and Y axis belts.
Leveled the bed using the XYZ protocol.
Adjusted the Z offset so two pieces of paper slide through fairly easily.


After doing this, I downloaded a nickel calibration test from thingiverse (http://www.thingiverse.com/thing:11261). It is supposed to allow you to print it and fit a nickel in the slots and center hole. Now, I did notice the circular portions of the print looked nice and round with no flat spots but the holes were just a little bit too small to allow the nickel to fit where it was supposed to. I've also noticed that generally speaking all of my prints with the Junior are slightly smaller than they are supposed to be. I usually have to make my designs slightly larger to be sure that when they print smaller than they should they still work.

What could cause this problem?

2 Reply by carl_m1968

  • carl_m1968
  • carl_m1968
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Re: Calibration Fail Davinci Junior

When your print cools it naturally shrinks a certain percentage and this varies from roll to roll of filament. What most do is make a calibration object. I made a cube that is 50mm by 50mm with a 20mm bore through each axis. By printing this object of known values I can see what the shrinkage ration is and correct my design measurement for it.

If you where not using a Junior with it's locked firmware you could go in to the firmware and tweak the steps per mm on each axis to get it a little closer as well. But the none of the Da Vinci machines allow you to edit firmware in stock form.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

3 Reply by HyruleJedi86

  • HyruleJedi86
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Re: Calibration Fail Davinci Junior

What if I found out the percentage shrinkage from a test piece and just used the xyz ware software to increase the size of the objects by that percentage anytime I use the software to slice an object?

4 Reply by HyruleJedi86

  • HyruleJedi86
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Re: Calibration Fail Davinci Junior

I did want to throw out there that since I did those modifications listed above, aside from printing slightly smaller, the quality of the prints has dramatically improved.

5 Reply by e13jimenez

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Re: Calibration Fail Davinci Junior

I can also confirm that performing these modifications improved my print quality as well