Unable to get a correct First Layer after Firmware update  

Re: Unable to get a correct First Layer after Firmware update

Make a Z level calibration and enter the same value for the Z level as you previously had. Then you should end up very close to the right Z level and you just need to do a fine tuning.
All your actions were useless because it's just about adjusting the Z level.

Another problem may be that the bed needs to be cleaned. Wash it with a mild soap solution (for hand-disk), then the filament will stuck again.

Re: Unable to get a correct First Layer after Firmware update

it's just about adjusting the Z level
no, it's not. because if I enter the same values that I had before the firmware update I get the result of the photo. then I can't tune the Z-Axis for the entire surface of the bed. if the filament lays correctly on the left side the nozzle crashes while getting to the right side. if I tune it to lay correctly on the right side the filament doesn't even try to touch the bed on the left side
the surface is cleaned with IPA 99% after every print and occasionally I cure the surface with acetone

Re: Unable to get a correct First Layer after Firmware update

Update to RC2 and perform a factory reset.
Then calibrate everything (well, selftest, xyz, First Layer - not EVERYTHING;-)) and please report back

Re: Unable to get a correct First Layer after Firmware update

You can do as Stahlfabrik says, or you do a Z calibration (Menu Calibration / Calibrate Z).
The problem you describe is because the X unit is not parallel to the bed.
This is corrected in the Calibration / Calibrate Z menu.

Re: Unable to get a correct First Layer after Firmware update

I feel like I've finally got a solution. like this really interesting treat sais 1st layer problems - in depth look at software PINDA problems (and solutions!) the PINDA is very susceptible to the temperature. I feel like I've got series of unfortunate events that they led me to think my problem was a software issue.

long story short.
I assembled and calibrated for the first time the printer inside a really warm room. then I placed the printer in my laboratory in the basement where I have a constant temperature of 20°C and 50% humidity. I successfully got amazing prints on my basement and the issue came after a firmware update, that brought me to recalibrate the printer. every single calibration after that time failed. at the end of this odyssey, I thought I had a problem with the extruder so I disassembled the extrusion unit, removing the fan to the hotend allowed to heat the PINDA that long enough that the subsequent calibration went perfectly.

I guess that's what happened. do you think that is possible?

Re: Unable to get a correct First Layer after Firmware update

Update to RC2 and perform a factory reset.
Then calibrate everything (well, selftest, xyz, First Layer - not EVERYTHING;-)) and please report back

I can cite myself:-)

If you do factory reset on 3.2.0RC2, temperature calibration will be off. So your PINDA will be a LOT less sensitive to heat.

I do not think the temperature at the the time of xyz calibration matters that much as long it is STABLE during the calibration. So do not calibrate with a hot printer, that is then cooling down during calibration.

If you want to have no more issues with temperature calibration or the PINDAs influence (and use the benefits of the new PINDAv2!!!): a)never start a print with PINDA temperature below 35C and b) perform a manual print based temperature calibration as described in the thread you have found;-)

Re: Unable to get a correct First Layer after Firmware update

whether update,
so yesterday I received a new hotend.
Last week or so, I really thought my issue with the first layer was resolved (my magic I would say because I was not able to perform a manual print based temperature calibration as stahlfabrik suggested)
then, out of nowhere, I start to get some extrusion inconsistency. I reach the tech support via chat again and a gentle guy guides me through some troubleshooting steps, concluding that I need a new hotend. I install it and since the Finale 3.2.0 firmware was out I decided to install it and perform a factory reset.
Needless to say that my original issue with the first layer came out again.
stahlfabrik, during the last tests, I took care of the temperature of my room the Pinda had a really hard time just to reach 30°C. do you still think my issue is still attributable to your research?

Re: Unable to get a correct First Layer after Firmware update

It is strange.

Have you done a downgrade to 3.1.3 and resetted - to be sure it is caused by 3.2.0?

Even if you have not: You could send the printer "M861 !" that should set the old default PINDA temperature offsets in EEPROM, that were standard in 3.1.3 (check the difference with "M861 ?" before and after). If you have done that go to menu settings and make sure temp calibration is active. Then the printer should behave just like in 3.1.3.

Have you done a XYZ calibration?

But are you SURE - that there is nothing on the PEI sheet? Use IPA 99% before every print, Aceton at most once a week to clean the bed. Use a paper towel and throw it away after usage.

Are you y rails all seated correctly? Not that the bed is not parallel?

Re: Unable to get a correct First Layer after Firmware update

My heatbed started giving poor results yesterday, on a previously working setup with Firmware 3.2.0.

I was trying to print 40 small parts with small thin contact patches on the build plate.

I printed one set, perfectly, the second set didn't seem to want to grip the build plate and the ends of the pieces started to lift...

Cleaning with IPA and Acetone didn't resolve the issue, so I took the build plate off the bed, and used detergent And water and a green scouring pad to make sure that the surface was absolutely clean, and after drying the build plate, the next print session was perfect again...

regards Joan

Re: Unable to get a correct First Layer after Firmware update

My heatbed started giving poor results yesterday, on a previously working setup with Firmware 3.2.0.

I have the feeling that these "new" PEI's dosent have the same "grip" as the one i had on the MK2 (now on MK2.5).
After cleaning with soap and water, Aceton and the IPA it workes good but not as the MK2 PEI..

Re: Unable to get a correct First Layer after Firmware update

My heatbed started giving poor results yesterday, on a previously working setup with Firmware 3.2.0.

I have the feeling that these "new" PEI's dosent have the same "grip" as the one i had on the MK2 (now on MK2.5).
After cleaning with soap and water, Aceton and the IPA it workes good but not as the MK2 PEI..

sand it with 600 grit sandpaper and it should be even better.

Re: Unable to get a correct First Layer after Firmware update

has been at least two weeks since I updated my Mk3 to the 3.2.0-RC1 after the update I noticed that the prints weren't sticking at all to the bed surface. so I ran a new First Layer calibration and noticed that on the left side the filament wasn't sticking at all and vice-versa on the right side it was squishing to the surface. here an image to give you an idea.

till then I had several conversations with the support team via chat, trying to troubleshoot every single aspect that could have been involved in this issue. here is a list of everything I tried:
-redo the calibration via the wizard
-reposition of the pinda
-check if the pinda works correctly via Pronterface
-used the bed level correction
-disassembled the Z axis and X axis
-repeated all the previous steps
-downgrade to Firmware 3.1.3
-repeated all the previous steps
-downgrade to Firmware 3.1.2
-repeated all the previous steps
to be clear. I own this printer for nearly two months and I never had any issue whatsoever. I successfully assembled a MK2S without any issue. and this issue came to me after the Firmware update. the strange part is that after the downgrade the issue is still here, and the support team doesn't know what could be the origin of this error

To me this looks very simple, it appears your left side of the x carriage is higher than the right.
home z and then measure from the bottom of the bearing guide on the left and right to the top of the z motor mounts. Is it the same distance or different? if it is different make it the same.

calibrate z is supposed to do this but all it does it run the x carriage all the way up. If either of the top mounts is off the carriage will be off. So that is why i measure from top of the z motor mounts to the bearing guide.

this happens when you are prying at the x carriage with steppers disabled or power off.

Re: Unable to get a correct First Layer after Firmware update

I'm really sorry for the lack of response on this thread, but I had to set aside my Prusa for a bit. now I'm back on the road.
Starting with order..

It is strange.

But are you SURE - that there is nothing on the PEI sheet? Use IPA 99% before every print, Aceton at most once a week to clean the bed. Use a paper towel and throw it away after usage.

Are you y rails all seated correctly? Not that the bed is not parallel?

yes, I mean. I always use IPA and Acetone and recently i need to use glue stick or Magigoo (which works pretty well for me)
like gert.l says

I have the feeling that these "new" PEI's dosent have the same "grip" as the one i had on the MK2 (now on MK2.5).
After cleaning with soap and water, Aceton and the IPA it workes good but not as the MK2 PEI..

me too.

home z and then measure from the bottom of the bearing guide on the left and right to the top of the z motor mounts. Is it the same distance or different? if it is different make it the same.
this happens when you are prying at the x carriage with steppers disabled or power off.

I tried my best, and actually, the print bed could be slightly misaligned with the X carriage but at the level of the bearings, they are solidly aligned and at the same height with the chassis.
I feel like there is not a sufficient quality check with the heated bed production as was pointed out in these articles:
How flat should my heatbed be?

[Testers Needed!] TPU "micro springs"

Re: Unable to get a correct First Layer after Firmware update

Live Z looks fine since filament looks nicely squished. However, though it might be the perspective of the picture, it looks like the "squishiness" is not the same in all the bed. This makes me wonder how leveled is your bed. Have you tried measuring bed level with https://shop.prusa3d.com/forum/user-mods-octoprint-enclosures-nozzles--f65/-help-needed-octoprint-prushmeshmap-plugin-t15333.html ? If bed is clean then I would look into bed leveling as a possible cause.

Re: Unable to get a correct First Layer after Firmware update

Live Z looks fine since filament looks nicely squished. However, though it might be the perspective of the picture, it looks like the "squishiness" is not the same in all the bed. This makes me wonder how leveled is your bed. Have you tried measuring bed level with https://shop.prusa3d.com/forum/user-mods-octoprint-enclosures-nozzles--f65/-help-needed-octoprint-prushmeshmap-plugin-t15333.html ? If bed is clean then I would look into bed leveling as a possible cause.

previously I mentioned that the inhomogeneous squishiness is exactly my problem and yes right now I'm looking forward to that thread to find a solution. seems like the microsprings are working quite well for some users.
I'd like to find a surrogate of tpu, just because I'd be constrained to buy a spool of flexible filament just for this purpose.
maybe I could use a rubber gasket. I'm just afraid for the temperature that this new components will experience

ill'be post a height map from that script very soon

Re: Unable to get a correct First Layer after Firmware update

IIRC, idea of TPU microsprings was then replaced with something like this: https://www.amazon.com/gp/product/B0786LYF3V