Somebody knows why is this happening? The model is taking off the bed and i cant finish it
ABS? ABS tends to shrink and lift up. You can add a raft layer or “helper discs” at the corners to help hold it down. A few layers of aquanet hairspray could help. I don’t do ABS much for those reasons (assuming that is what you are using). PLA really shouldn’t do that.
Most commonly in larger prints this is inexact bed leveling.
Do you have a heated bed? Can you temporarily enclose the printer to keep the heat in while it prints?
What’s your bed temperature? Try rising it up 5 degrees celcius
The Top seems To under extrude, maybe your hobbed Bolt is ‘full’ and can’t drive the filament at sufficient speed?
use BRIM settings, add a 4mm brim to help hold it down, run your heat bed at 90c or higher, and check your retraction settings too (loose the loops)
My best results on big parts are: a quality PLA, heated bed @70deg cel. and UHU glue stick on glass.
I am with @Chris_Bigpaws_Chambe on this. you need a good brim. You have too much surface area vs bed contact area to not have brim. Like him, I also think you are probably using ABS which is notorious for lifting.
If you had an air barrier of even just 3 inches all the way around the heated bed, it would drastically help ABS. Some have said that 3 walls out of 4 for an air barrier is a great help.
From the pictures, it looks like you have a box shaped cartesian printer with acrylic parts. I can’t tell if it has a proper build enclosure, but I am thinking it does not.
A heated enclosure will help ensure that the heated bed will do more good. One point of the heated bed is to keep the plastic from contracting. The other point is to help the plastic adhere to the print bed. Drafts of any sort will cause big problems for ABS and cause problems like this even if your heated bed is hot enough.
yeah，i looked carefully about your modle，it‘s amazed to me，as you know，the Heat shrinkage of ABS is much higher than PLA，so you should take actions to keep high temperature of the interior space of the machine.such as looking for plastic bag to cover the machine.another questions is you should turn down the amount of the flow,maybe you can have a try.if you have another questions ,send email to me,cwjpersonal@foxmail.com
Thank you very much i appreciate all your comments they were very useful