POLL - What is YOUR - Z axis offset for Prusa Mini?  

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aussieinkguy
(@aussieinkguy)
Active Member

Hi All,

 

As it's so critical to the success of the print, I'm keen to get a idea of what Z-axis offsets Mini / Mini+ users are running: 

 

Mine is currently : -1.300.    (for PLA / PLA+ predominantly).

 

NB. If you use multiple settings, perhaps the one that gets the most use AND what filament it's for.

 

Keen for your feedback.

Prusa Mini+ - Fw. 2.3.1 - PrusaSlicer 2.3.0 (Mac) - Filaments PLA / PLA+ / PETG....
Posted : 07/03/2021 1:21 pm
Oxygen
(@oxygen)
Reputable Member

it all depends on the sensor (PINDA or SPINDA) and the print surface and how you calibrated the sensor

Mini with FW:4.3.1 + SuperPINDA + Bondtech Heatbreak + PC4-M8 couplers + 1 piece boden...
Posted : 09/03/2021 9:06 am
aussieinkguy
(@aussieinkguy)
Active Member

@oxygen

OK, So i've gone back to the User Manual and calibrating the sensor wasn't one of the steps listed. Working from Section 6 (page 14) 'Your first print'. 

Is there something i've missed here?? 

Please advise how critical it is for this to be done on a new Prusa Mini+? And if there's a reference directing this. 

I found this in the help section : 

https://help.prusa3d.com/en/guide/how-to-adjust-the-height-of-the-m-i-n-d-a-sensor-mini_154547

If it's something that will improve the quality / printability of the printer. Then I'll work through this too. 

Thanks. 

PS. 'Bondtech Heatbreak' in your signature, was this an upgrade or a requirement. (Ie. was the printer working well prior to this install). Thanks. 

Prusa Mini+ - Fw. 2.3.1 - PrusaSlicer 2.3.0 (Mac) - Filaments PLA / PLA+ / PETG....
Posted : 09/03/2021 10:18 am
cwbullet
(@cwbullet)
Illustrious Member

-0.505 to -1.470

--------------------
Chuck H
3D Printer Review Blog...
Posted : 09/03/2021 11:21 am
Oxygen
(@oxygen)
Reputable Member

With calibrating the sensor I mean adjusting the height (visible in step 3 of the guide you pointing to) only I had issues with 0.8mm (the size of a credit card) my liveZ was -1850 and with a textured sheet you have to lower the Z by approx 200. LiveZ has a maximum value of -2000. I calibrated the SPINDA with 1.5mm and my Z varies now between -415 and -615. My choice to replace the heatbreak was done before I had the SPINDA sensor. In that period of time I had issues with under-extrusion (it could be that the issues were tied to the PINDA and if I would replace the heatbreak back my issues would still be solved...) same with the couplers and the boden tube -- my printer prints fine now.

Mini with FW:4.3.1 + SuperPINDA + Bondtech Heatbreak + PC4-M8 couplers + 1 piece boden...
Posted : 09/03/2021 12:12 pm
Richard D
(@richard-d)
Eminent Member

-0.995.

After adjusting the position of the heatbreak (it was too low, extending too far out of the heatsink as delivered from the factory) and the SPINDA to match.

Posted : 14/03/2021 1:55 am
Lung
 Lung
(@lung)
Eminent Member

-1615 on the smooth sheet, -1920 on the textured.

Posted : 15/03/2021 4:31 pm
Eric
 Eric
(@eric-3)
Active Member

-1.965  on the smooth sheet w/ PLA

Posted : 24/03/2021 6:55 am
Richard D
(@richard-d)
Eminent Member

After taking my hot end apart, mine's now recalibrated to -1.310 on the smooth sheet.

I can’t help thinking that numbers much higher than -1.500 suggest that either the SPINDA needs moving up a little, or more significantly that the heatbreak might need moving too,  With a poorly positioned heatbreak implicated in partial clogs and underextrusions.

Posted : 24/03/2021 7:19 am
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