While printing using ABS filament the magnetic pad, to which the print plate sticks, comes away from the bottom print bed and causes the prints to fail - as a consequence once the calibration has finished I have to pause the print and attach G clamps at all 4 corners to prevent print failure - has any once else seen this fault? The bed is at 100°C and the chamber is closed with the top lid on.
I have read about this before but have not had it happen when I print ABS, perhaps the magnetic pad is stronger on my Qidi machine than a K1. Perhaps there are stronger magnets available, I think most magnetic plates are rated to 80°C but there must be higher rated plates for higher temperature machines.
When cooling down ABS shrinks in size. If there are different temperatures in the piece it may result in warping the ends off the print loose from a fixed build surface or even seperating layers in the abs-print.
So what you see is warping with the abs-print sticking to your sheet but applying enough warping force to seperate the print surface from the magnet on the bed.
The solution is: Use a enclosed print space, prevent airflow (cooling), reduce or stop your part cooling fan and so on.
Also after the print let it cool down in the closed enclosure. A heated enclosure would even work better.