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

[Franzeluta]

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.

[img]http://i.imgur.com/8FXYtMB.jpg[/img]

[img]http://i.imgur.com/34cck0b.jpg[/img]

[Tincho85]

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:
http://forum.seemecnc.com/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.

[chuyuanver]

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)

[Tincho85]

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.