Inconsistency in Live-Z-Value
Hi there,
on my freshly assembled MK3S I can't get a Z-Value which results in a consistent good first layer. I used the method described here https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-assembly-and-first-prints-troubleshooting/life-adjust-z-my-way/ and when the value feels correct I have to adjust it the next day because I have a bad result on the first layer again.
Correct values range about 50 microns (is it microns? - I'm not sure...)
At first a value of about 1000 seemed correct but I had to change it every time the printer was off for a while.
I already lowered the Pinda probe as proposed by the handbook and the value is about 1500 now but I still can't get consistent good results.
Any suggestions what I can try next?
RE: Inconsistency in Live-Z-Value
Hi @flosten
If I understand you correctly, the Z level changes every time the printer has been turned off.
If the Z level is to be saved in the printer memory, you must first perform a full "First layer calibration" which is located under the Calibration menu.
When you have done this, your Live Adjust Z adjustment will be saved in the printer memory. So you must first complete the "First layer calibration".
Bear MK3 with Bondtech extruder
RE: Inconsistency in Live-Z-Value
@rhdreambox
No you got me wrong - perhaps the description of the problem from me wasn't very good.
I did the calibration and and the value gets saved correctly every time. The problem is that today the best value to get a good first layer is for example 1550 but tomorrow 1550 is to high or to low to get a descent first layer. If I calibrate it again I get good results for a value of 1560 for example and the next day 1540 is optimal or maybe 1570.
That is what I meant with "Inconsistency in Live-Z-Value". The problem is also described in the handbook under 6.3.10.2 but the suggested solution doesn't work for me or atleast I think it does not.
Or do I have to lower the probe even further? I already have values of about 1500 now so does this mean I could lower it for max. 0.5mm to be at about 2000 for z-Value?
I hope I expressed myself more clearly this time, sry...
RE: Inconsistency in Live-Z-Value
OK, I understand now. First, you should not lower PINDA even more. A good Z level is between -0.600 to -1.000. It works with other values as well, but I think PINDA might work worse then.
If you need to calibrate the value as you say it may have other causes. It can, for example. be rubbish under the steel plate or that some Z-component is a little loose. The filament, its configuration or uneven extrusion may also be a cause, but I would probably start by checking the printer's mechanics.
Bear MK3 with Bondtech extruder