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Craig
(@craig-7)
Active Member
Calibration

Set up my mini+. 

Tests were all passed using the wizard.

The test print was very high, and even when manually moving the Z down would be ok on one corner and then return to about one cm high on the other edge. 

I checked the tightness of the bolts, ran a straight edge over the plate and nothing seems out of alignment.

I notice that going to the manual axis settings the Z height reads zero when the extruder is well off the bed. 

Testing the pinda probe by pressing the button next to the selector knob for 5 seconds and then putting a thin metal ruler under the probe and the value didn't change from zero to one.

Any suggestions?

This topic was modified 6 months ago 2 times by Craig
Posted : 16/04/2021 3:48 am
Craig
(@craig-7)
Active Member
Topic starter answered:
RE: Calibration

Also,

Testing the pinda probe, the red light does go out when using a thin metal ruler is placed under the probe, but the z axis doesn’t change from 0 to 1 as per the troubleshooting procedure.

When Mesh Bed Levelling is selected 16 positions are probed, but when First Layer Calibration is selected only the first 4 positions are probed, then the machine pauses until the temperature is achieved before starting the print.

Posted : 16/04/2021 7:11 am
Craig
(@craig-7)
Active Member
Topic starter answered:
RE: Calibration

IMG_3518IMG_3523

Posted : 16/04/2021 7:25 am
herbert
(@herbert)
Trusted Member
RE: Calibration

I would suggest you to talk to prusa support, it is a new device and if you have such issues, they would be the right contact to fix or replace things.

If the bed skew is to high or the superpinda is broken, (which could be) they could immediatly send you a replacement.

Posted : 16/04/2021 9:33 am
Eirlink
(@eirlink)
Eminent Member
RE: Calibration

I used Bob Georges test prints and find this method is excellent

https://www.prusaprinters.org/prints/40729-parametric-bed-level-test-generator

i was getting some roughness on the LHS at -1.850 and it improved at -1.900 z offset. BTW am i right in thinking these are quite extreme offset values ( spring steel sheet ) ? i was expecting to hit the sweet spot before -1.000

 

IMG_0101

This post was modified 6 months ago 2 times by Eirlink
Posted : 18/04/2021 7:15 pm
cwbullet
(@cwbullet)
Illustrious Member
RE: Calibration

@eirlink

That is probably the best first player test I have seen.  I have used it on my Prusa's and my other printers. 

--------------------
Chuck H
3D Printer Review Blog...
Posted : 18/04/2021 10:07 pm
Eirlink
(@eirlink)
Eminent Member
RE: Calibration

@cwbullet

The following at -1.900

Posted : 18/04/2021 10:18 pm
cwbullet
(@cwbullet)
Illustrious Member
RE: Calibration

That Z is ok, but it is a little high.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 18/04/2021 10:39 pm
Eirlink
(@eirlink)
Eminent Member
RE: Calibration

@cwbullet

should i keep going in the direction of -2.000?

 

Posted : 18/04/2021 10:43 pm
cwbullet
(@cwbullet)
Illustrious Member
RE: Calibration

I would adjust the pinda down a notch or two and start at zero again.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 19/04/2021 12:53 am
Eirlink liked
Eirlink
(@eirlink)
Eminent Member
RE: Calibration

@cwbullet

adjust the spinda down? 

I checked it by lowering the z axis until the tip of the nozzle is barely touching the bed, and a credit card will not fit under the probe?

Posted : 21/04/2021 7:47 pm
cwbullet
(@cwbullet)
Illustrious Member
RE: Calibration

@eirlink

I have found that if I keep lowering to nearly -2 that if I lower my sPinda and start over that it will make ti less negative.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 21/04/2021 7:52 pm
Malabor
(@malabor)
Eminent Member
RE: Calibration

I just assembled my Mini+ last night and got all the way through to this stage of calibration.   My initial test print looks just like the OP's.  Has anyone else had this problem?   My print nozzle is so far away from the print bed and it seems like when I use the dial to try and get it closer to the bed, it does nothing.  :-\

I'm new to 3D printing and I'm excited to get into it (printing terrain and such for tabletop gaming) but I'm scared I may have messed something up.

Posted : 21/04/2021 8:37 pm
fuchsr
(@fuchsr)
Noble Member
RE: Calibration

If you're close to -2 with your Live Z, I would reposition the PINDA higher.

The Super PINDA should have about 1.5 mm distance between nozzle and SPINDA, so that you’re around -1 when your Live Z is correct. (For the old PINDA, it was 0.8mm).

Instructions are in Step 16 of https://help.prusa3d.com/en/guide/how-to-replace-superpinda-mini-mini_179912 (Mini) or
https://help.prusa3d.com/en/guide/how-to-replace-superpinda-mk3s-mk3s_179920 (Mk3S)

I put this little helper on Prusaprinters.org to help position the SPINDA: https://www.prusaprinters.org/prints/57192-spinda-height-adjustment-tool-mounts-into-3030-ext. Works better than zip ties or credit cards, which have less well-defined heights.

 

Posted : 21/04/2021 9:25 pm
Eirlink liked
Eirlink
(@eirlink)
Eminent Member
RE: Calibration

@fuchsr

would you recommend this one ? its quicker to print

https://www.prusaprinters.org/prints/56918-super-pinda-spinda-spinda-height-adjustment-tool/files

This post was modified 6 months ago by Eirlink
Posted : 21/04/2021 9:59 pm
fuchsr
(@fuchsr)
Noble Member
RE: Calibration

Sure. They're the same, the other one just has the mount for the 3030 extrusion. Functionally they're identical. 

-r
Posted : 21/04/2021 10:20 pm
Eirlink liked
cwbullet
(@cwbullet)
Illustrious Member
RE: Calibration

@eirlink

That is the one I use.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 22/04/2021 12:04 am
cwbullet
(@cwbullet)
Illustrious Member
RE: Calibration

@fuchsr

I don’t think that is right.  If you go higher with the PINDA, your z offset would become more negative.  Would it not?

--------------------
Chuck H
3D Printer Review Blog...
Posted : 22/04/2021 12:10 am
fuchsr
(@fuchsr)
Noble Member
RE: Calibration

When the PINDA is higher, the nozzle can go lower (closer to the sheet) before the PINDA triggers, therefore the live z is less negative. 

Feels counterintuitive. Took me a bit to get my head around this...

Posted : 22/04/2021 2:00 am
cwbullet
(@cwbullet)
Illustrious Member
RE: Calibration

@fuchsr

That is odd.  That is not how my printer works.  I just lowered my Pinda and the Value for Z offset got less negative.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 22/04/2021 10:16 am
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