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Changing print tempter for first few layers  

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The_BTC_man
(@the_btc_man)
New Member
Changing print tempter for first few layers

Hi,

I just recently started printing on my pusa mk3s but I can't get some prints to print. I have tried to use a glue stick but that dose not work so i want to try adjusting the temp the first few layers are printed. how do I do this? 

This my be a stupid question but I am still a noob.

Posted : 04/10/2021 10:17 pm
fuchsr
(@fuchsr)
Noble Member

can't get some prints to print

What do you mean? Not sticking to the steel sheet? In which case, it's either dirt on the sheet (clean with hot water and dishwashing soap, then use 91+ % IPA to clean between prints, never touch surface of the sheet with your hands), and/or wrong first layer calibration/Live Z. My money is on the latter. Use this https://forum.prusaprinters.org/forum/original-prusa-i3-mk3s-mk3-assembly-and-first-prints-troubleshooting/life-adjust-z-my-way/ instead of the built-in method. I would start there before playing with temperatures. 

If you meant anything other than not sticking, please provide more detail.

Posted : 04/10/2021 10:59 pm
The_BTC_man
(@the_btc_man)
New Member
Topic starter answered:

Most of my prints don't stick to the steal sheet and I have already tried to clean the steal sheet.

Posted : 04/10/2021 11:03 pm
Diem
 Diem
(@diem)
Noble Member

Clean it again with dishwashing soap (Dawn/Fairy) and plenty of HOT water.  Make sure you get rid of all the glue then dry it with a fresh paper towel and DON'T TOUCH the printing surface.

Show us a picture of your first layer calibration.

Cheerio,

Posted : 04/10/2021 11:41 pm
The_BTC_man
(@the_btc_man)
New Member
Topic starter answered:

Here is a pic of the first layer calibration.

Posted : 05/10/2021 12:00 am
JoanTabb
(@joantabb)
Moderator

that looks as if Live Z is not set properly, the nozzle looks too high....

Try 
Life Adjust Z, My Way,    By Jeff Jordan

https://forum.prusaprinters.org/forum/original-prusa-i3-mk3s-mk3-assembly-and-first-prints-troubleshooting/life-adjust-z-my-way/

there are test files for PLA, PETG and ABS at the bottom of the first post, on the first page!

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 05/10/2021 7:14 am
fuchsr
(@fuchsr)
Noble Member
RE: Changing print tempter for first few layers

As i said in my previous response, my money was on bad first layer calibration, and your picture confirms it. You have to go a lot lower. I use the built in method in steps of 100 (0,-100,-200, etc) to get the zig zag pattern to have straight lines and right angles, then switch to the Live Z My Way method Joan and I have linked to to fine tune it. Try this and you'll be on your way quickly!

Posted : 05/10/2021 11:01 am
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