1 Topic by Manx

  • Manx
  • Member
  • Offline
  • Registered: 2012-09-25
  • Posts: 524

Topic: mostly calibrated

Ok so i printed a cube out it was modeled at 20 mm cubed with an interior holes that was 18mm around and 19mm deep

Post's attachments

068.JPG
068.JPG 1.11 mb, file has never been downloaded. 

069.JPG 1.2 mb, file has never been downloaded. 

070.JPG
070.JPG 1.2 mb, file has never been downloaded. 

071.JPG 1.16 mb, file has never been downloaded. 

072.JPG
072.JPG 1.28 mb, file has never been downloaded. 

You don't have the permssions to download the attachments of this post.

2 Reply by carl_m1968

  • carl_m1968
  • carl_m1968
  • Member
  • Offline
  • From: Far North almost not Dallas
  • Registered: 2014-10-17
  • Posts: 6,512

Re: mostly calibrated

Just need to tweak your steps per mm on each axis a bit unless you are happy with that tolarance.

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 Manx

  • Manx
  • Member
  • Offline
  • Registered: 2012-09-25
  • Posts: 524

Re: mostly calibrated

not sure how to do that

4 Reply by carl_m1968

  • carl_m1968
  • carl_m1968
  • Member
  • Offline
  • From: Far North almost not Dallas
  • Registered: 2014-10-17
  • Posts: 6,512

Re: mostly calibrated

Just google adjusting steps per mm. Plenty of videos and tutorials on it.

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.

5 Reply by jagowilson (edited by jagowilson 2015-05-23 04:46:33)

  • jagowilson
  • PRINTiT
  • Offline
  • Registered: 2014-09-14
  • Posts: 1,701

Re: mostly calibrated

If you adjust steps per mm this way, you will see error accumulation in larger prints. The stock steps per mm are correct. You have play in an axis, probably Y at the drive rod.

6 Reply by grob (edited by grob 2015-05-25 06:47:09)

  • grob
  • grob
  • Member
  • Offline
  • From: Sydney, Australia
  • Registered: 2014-01-02
  • Posts: 900

Re: mostly calibrated

Yup, don't touch those steps-per-mm unless you're trying to fix an error below about 0.01mm... :Z
<=0.3mm could quite likely a combination of wall thickness variation and hysteresis in that axis. This is all neglecting print imperfections (there's at least 0.1mm worth of bulge in your corners... Slic3r is working on an extruder pressure control algorithm to try and minimise these, but until then no dice haha), and thermal effects (warping, bending, stretching filament etc.). You'll also have to accept at some point that life in the land of FFF doesn't get a whole lot better than this! smile

In order to determine whether your problem is a constant error or a proportional error, you will need to calibrate at least two points (e.g. do a 80mm square too). See this diagram: http://www.soliforum.com/post/88520/#p88520

The only number I'm seeing there you're likely to improve with tuning is the 19.76. I think you should be able to bring that up a bit once you've worked out what the cause is (of many options...)!

SD3. Mk2b + glass, heated enclosure, GT2 belts, direct drive y shaft, linear bearings, bowden-feed E3D v5 w/ 0.9° stepper
Smoothieboard via Octoprint on RPi