All prints fail every time sience yesterday - Prusa I3MK3S  

RE: All prints fail every time sience yesterday - Prusa I3MK3S

Sudden failures mean something has changed.  They this:

1.  Check the nozzle for Klingons.  

2.  IPA the bed and try a first layer calibration again.  Mage sure the square does not come apart when you pull the print off the bed.  

3.  If the print fails a second time, each the bed with Dawn and try again.  

RE: All prints fail every time sience yesterday - Prusa I3MK3S

By any chance did you clean the bed with alcohol before prints started failing?

RE: All prints fail every time sience yesterday - Prusa I3MK3S

Posted by: @tim-m30

By any chance did you clean the bed with alcohol before prints started failing?

I think wiping the bed with Klingons is also problematic 

RE: All prints fail every time sience yesterday - Prusa I3MK3S

And when you report problems like this, tell the type of print sheet you are using.

It matters. I can speculate from your description you are using the textured sheet.

If so, I would skip the IPA and move right to a Dawn scrub. Not every time - just when you have a serious problem.

RE: All prints fail every time sience yesterday - Prusa I3MK3S

Looking at the picture the OP attached with their first post I can see that it is a textured sheet. The upper right-hand corner is out of focus enough that I can't make out the batch number though.

RE: All prints fail every time sience yesterday - Prusa I3MK3S

@bobstro

I meant nozzle Klingons.  

RE: All prints fail every time sience yesterday - Prusa I3MK3S

Sem - people who help others for free and are donating time to provide such help should not have to dig, scrape, and hunt for, or even divine information that is required to help the person asking.  It is a total waste of time and I've stopped the practice: if I don't see enough info to help I usually post a quick rather useless comment or move on.   People who say "My printer is failing, it just started. What's wrong?" deserve the quality of help they are asking for.

RE: All prints fail every time sience yesterday - Prusa I3MK3S

@tim-m30

Yes, I did wiped the bed with alcohol, but I wipe the print bed with alcohol every time I print. After reading this I also wiped with isopropyl alcohol and printed again but the problem is the same on the textured print bed.

So I tried to print on the original print bed that is not textured but the problem appeared on this print bed also - like the new image.

But I stopped using the original print bed with PETG because PETG was sticking to hard on it and broke the print bed in a few places.

Tim, if I would have more info I would mention it from the beginning but I don't. 

Thank you for your time and if you think I can provide more info please ask but I don't know what to provide right now.

RE: All prints fail every time sience yesterday - Prusa I3MK3S

I also checked the nozzle and is clean as far as I can see, I will open the heating section today to see what is going on inside. 

As the previous image shows, not only the section marked with red is a problem but all the lines that the printer layed in that section are bad, is like the print head lifted when it shouldn't. This is why I think I should open the printer and take a look inside.

RE: All prints fail every time sience yesterday - Prusa I3MK3S

@tim-m30

Thank you, it printed fine the last object.

RE: All prints fail every time sience yesterday - Prusa I3MK3S

It is amazing how often live Z is the issue.  Too low to too high and all you need is a first layer calibration.  

RE: All prints fail every time sience yesterday - Prusa I3MK3S

@charles-h13

I don't think the live Z was the problem, but the greasy printbed.

RE: All prints fail every time sience yesterday - Prusa I3MK3S

Posted by: @victor

@charles-h13

I don't think the live Z was the problem, but the greasy printbed.

Heck, that would do it.  Either way, watch the forum, you will see how often someone thinks they have their live-z dialed in and they don’t.  

RE: All prints fail every time sience yesterday - Prusa I3MK3S

I always print by cleaning the smooth plate with Isopropyl alcohol for Pla, if it takes many hours I usually put a little lacquer on it.
If it's petg, I usually wash with degreaser and glue stick for the tpu, where will the printing go and everything works wonders for me, kind regards, Jose

RE: All prints fail every time sience yesterday - Prusa I3MK3S

I'm going to take this opportunity to voice my experience and hence my opinion with my sheets, I currently own 4 smooth PEI sheets and 2 textured sheets, I own 3 machines 2 MK3's and 1 MK3S and NEVER, not once ever have I had to use soap or some kind detergent or scrubber to clean my sheets, in fact they have only ever had IPA or plain warm water on them, (in the case of Glue or Windex used as a separator) I've always wiped with a paper towel, and I have not had any adhesion issues that couldn't be solved with one of those two, One caveat being I use Acetone once every several hundred prints or so to freshen my smooth PEI sheets when they have a lot of print lines on them from past prints.

Having your printer tuned is the most impotent thing that you can do to help yourself. Sometimes it takes a person time to understand what a tuned printer is, since everyone has their own experience and therefore view of whats acceptable and whats not. This is especially true of a printer kit, since even tiny differences in assembly can make big differences in how your prints turn out or don't turn out.

With that said many folks here have their own experience, opinion and hence advice that they offer to try and help, some will say, "well if that doesn't work then try this" and still others will say never use that, use this and only this, (e.g. IPA vs soap and water) which seems to be a recurring almost annoying thyme around here. You will find this with several subjects here, my advice is to listen to the advice, but you use your own common sense and create your own experiences, and see what works for you, if one thing is not working and the next suggestion in line seems to make sense and doesn't seem harmful give it a shot.

good Luck