Calibration problems for a big print, Please Help!!!

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Franzeluta
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Joined: Sat May 20, 2017 6:40 am

Calibration problems for a big print, Please Help!!!

Post by Franzeluta » Thu Jul 20, 2017 6:27 am

Hi, so I tried to print this big Tesla sight and it don't want to stick to the bed.
I tried leveling (G29) and also the advanced calibration wizard website but it didn't help.
The machine is max V3 and I use glue on the top of the bed, gray PLA printing material.

Image

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Tincho85
Printmaster!
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Joined: Sun Nov 03, 2013 12:27 pm
Location: Buenos Aires, Argentina

Re: Calibration problems for a big print, Please Help!!!

Post by Tincho85 » Thu Jul 20, 2017 11:50 am

Hi, my biggest recommendation would be to get an aluminum heat spreader, like this one:
http://www.tricklaser.com/Heat-Spreader ... R-ONYX.htm

and a PEI top surface:
viewtopic.php?t=7452


But for now, you can try this:
* For PLA, I used to print it very well on top of blue painter’s tape.
* Glue stick or hair spray are good alternatives, make sure the last one has "Vinyl Neodecanoate Copolymers". It's the stuff that makes your prints stick.
* Bed at 60ºc
* Print the first layer very slow.
* Lower the nozzle a bit more.

Best of luck.
Martín S.

chuyuanver
Plasticator
Posts: 9
Joined: Sun Jan 15, 2017 8:49 pm

Re: Calibration problems for a big print, Please Help!!!

Post by chuyuanver » Thu Jul 20, 2017 3:22 pm

One thing you can do without messing with calibration would be increase the first layer height (with slicer) and decrease the nozzle height by G31 Z-0.05 (you can make it more negative with step of 0.05 as long as your nozzle don't touch the bed)

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Tincho85
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Joined: Sun Nov 03, 2013 12:27 pm
Location: Buenos Aires, Argentina

Re: Calibration problems for a big print, Please Help!!!

Post by Tincho85 » Thu Jul 20, 2017 3:44 pm

Another option is to change the "Z max length" though EEPROM.
In order to lower the nozzle, you increase this value (with a bigger z length the printer thinks it has more room to move down).
To raise the nozzle, you decrease it.
Martín S.

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