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delta calibration problem (with pictures )

Posted by szivgy

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szivgy

delta calibration problem (with pictures )
February 13, 2015 04:02AM

Registered: 9 years ago
Posts: 2

Hi!

I built a delta printer, and I'm trying to calibrate. Unfortunately the frame is not too accurate. sad smiley

I measured z with the printer and the surface is strange for me. I don't have idea which inaccurate of parameters cause this.
I attached 4 pictures.
Which parameter(s) cause(s) this problem?
(sorry for my poor English smiling smiley

)

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Attachments:
open | download - 1.jpg (53.9 KB)
open | download - 2.jpg (44.9 KB)
open | download - 3.jpg (45.5 KB)
open | download - 4.jpg (48.2 KB)

dc42

Re: delta calibration problem (with pictures )
February 13, 2015 08:28AM

Registered: 10 years ago
Posts: 14,672

Please can you show where the towers are in relation to your plots.

Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

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szivgy

Re: delta calibration problem (with pictures )
February 13, 2015 10:23AM

Registered: 9 years ago
Posts: 2

Hi!

Thank you for your answer.

These are my measured values. x,y, z. I attached a picture, I tried sign the positions of towers.

0 0 7,5
0 115 7,1
0 -115 7,1
-99.59 -57,5 7,6
99.59 57,5 8,1
99.59 -57,5 7
-99.59 57,5 5,7
50 50 7,7
-50 50 6,7
-50 -50 7,7
50 -50 7,5

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Attachments:
open | download - 5.jpg (84.1 KB)

dc42

Re: delta calibration problem (with pictures )
February 13, 2015 03:03PM

Registered: 10 years ago
Posts: 14,672

Have you done endstop and delta radius adjustment, to make the Z height at 3 points close to each of the towers the same as the Z height at he centre of the bed?

If yes, then I'm not at all certain, but I suspect that your diagonal rods are not quite all the same length between the bearing centres. Have you checked that?

Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].