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life adjust Z - my way  

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RandyM9
(@randym9)
Estimable Member
RE: life adjust Z - my way

Got it, thanks for the clarification.

Your Z height still looks too high to me, based on your posted photos. If you are printing with the nozzle too high the results will always be uneven.

Try being more aggressive in dialing your nozzle height down. As an example, if you’re at -1.o58 and you dial down to 1.065, the height change is minimal. Keep dialing down through 1.075, 1.085, 1.095, etc, and watch what’s happening on the print bed. 

When I first started out, I had no idea what I was looking at or what result I was trying to achieve, until I got there. I was really surprised at how far I had to spin the dial to get a solid first layer.

Obtw, make sure your print sheet is super clean or you will forever be frustrated with this. There are many posts on sheet cleaning so I won’t go into it here but IPA alone is not enough to clean a dirty sheet. Fingerprints and skin oils are the enemy.

Good luck, you’ll get there!

 

Posted : 04/06/2022 2:45 pm
Jeff B
(@jeff-b)
New Member
RE: life adjust Z - my way

This has worked for me as well, Thanks again!!

Posted by: @jeffjordan

hi community
just want to share with you my way of finding the right correction value for the life Z adjustment.
just in case that somebody still tries to get it right with the v2 calibration gcode that came with the kit, which i think is only of limited usability.

💡
find attached a little gcode that should print a 75x75mm surface with 0.2mm height (PLA settings).
i simply print this file in a bright color (takes about 12 minutes) and change the life Z adjustment level in the middle of the print, when the diagonal of the square is reached.
so a little film is printed. a good idea is to write the settings with an edding at the sheet 😉 .
i repeat the procedure until i get a completely smooth and homogenous surface.
in addition it's a good idea to measure the thickness of the film with a micrometer gauge or a digital vernier calliper ❗

➡ when you look at the attached picture, you can see at first sight, that the right foil (with the -365um and -400um) shows some small gaps, which indicates that you need to squish down the nozzle a little bit more.
furthermore you can see that the -500um setting delivered the best result, and as you can guess: it's thickness was exactly 0.20mm.

anything more to explain ?

update:
just forget to tell you how you can get the film off from the heatbed without damaging it:
just use coolant spray at one edge. the sheet will immediately curl up and you can get it off easy as pie from the printing surface with your spatula.

edit 17th january: just replaced the attached gcode file with one where i added a "G1 Z=10.000 F1800" at the end, just to make sure that the nozzle moves up a little bit more (would remain at 0.2mm after the print).

edit 29th of august: removed the first test sheet (which has been downloaded more than 1000 times) and replaced it by the most recent one (v4).

 

With the advent of the Prusa Mini the files above, proved unsatisfactory, 

I add the file below in the hope that Mini users find it useful, the Contents are a .3mf file with the test patch on the build plate, so that you can edit it for new filaments, plus ready made test patches, for PETG, PLA and ABS.
Please let Joan.t know if there are any problems. 75mm square Mini Life Adjust Z

.

➡ update (14.01.2018): calibration surfaces for PLA, ABS & PETG (generated with the latest S3D version, lin-advance, G87 and preheat procedure to avoid nozzle dripping (tnx 2 PJR)):

 
Attachment replaced by Joan Tabb. 
S3D_calibration_surfaces_75x75@200um_v6.1

 

 

Posted : 15/06/2022 1:10 am
Henry
(@henry-2)
Estimable Member
RE:

I've read through a few pages, definitely not all of them, and I have just one simple question. Why is the original test file so popular? Aside from the manually inserted beeps and boops at the half way point, what benefit does this provide? Is it fundamentally different than just dropping a 25mm x 25mm x 0.2mm square on the print bed and slicing it?

Edit: Ok, so that was technically three questions.

Posted : 06/07/2022 2:12 pm
JustMe3D
(@justme3d)
Reputable Member
RE:

 

Posted by: @henry-2

I've read through a few pages, definitely not all of them, and I have just one simple question. Why is the original test file so popular? Aside from the manually inserted beeps and boops at the half way point, what benefit does this provide? Is it fundamentally different than just dropping a 25mm x 25mm x 0.2mm square on the print bed and slicing it?

It´s popular because it´s gcode and many newbies have no idea how to create  a square for individual slicing (just a fact and I was there 3 years ago, too). If you can do it, there´s no additional benefit IMHO from using the gcode provided but rather an additional level of complexity as you may have to re-dial your own temp settings for your own preferred filament once you start the pre-set gcode.

Nevertheless, I believe it´s still very important to maintain the gcode files in the thread and Joan does a great job in keeping them current.

Cheers

Chris

 

 

 

This post was modified 1 month ago by JustMe3D

I try to give answers to the best of my ability, but I am not a 3D printing pro by any means, and anything you do you do at your own risk. BTW: I have no food for…

Posted : 06/07/2022 2:16 pm
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