POLL - What is YOUR - Z axis offset for Prusa Mini?
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.
it all depends on the sensor (PINDA or SPINDA) and the print surface and how you calibrated the sensor
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 :
If it's something that will improve the quality / printability of the printer. Then I'll work through this too.
PS. 'Bondtech Heatbreak' in your signature, was this an upgrade or a requirement. (Ie. was the printer working well prior to this install). Thanks.
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.
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.
-1615 on the smooth sheet, -1920 on the textured.
-1.965 on the smooth sheet w/ PLA
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.