I have been trying to print a ABS box 100 x 100 mm, height 65 mm with wall at 2 mm.
Delamination every time, until I made a enclosure fitted with two halogen lamps each at 50 W
The temp inside stabilize at 39 C after 4 hours, perfect print no delamination. I made a square hole so the controller is sticking out not exposing it to the heat.
I been trying different settings, layer heights, .35 and .50 nozzle high nozzle temp…
Back to .35, 230 C and 85 C at bed.
Enclosure without the lamps did get the temp up to 34 but this was not sufficient.
This is only a 5 C difference, but I believe it may be slightly more as the lamps are pointing to the bed.
I have fitted a dimmer for the lamps as the high temp is not required at lower prints I believe.