We have printed black ABS out of the box on an UM2. It was a medium sized object about 8mm high and 8cm in diameter. Like Joergen says, you cannot have the fan on much for the first layers, the heater cannot keep up with the target temperature when you start to get up to 80-90 degrees and above when the fan is on early. This is with standard office temp in surroundings. Apart from lowering fan also closing the open side will help.
Joergen: how big parts have you printed in ABS on UM2?
Can you increase heater capacity in an "easy" way?
Recommended Posts
joergen 2
I print ABS on the UM2 straight out of the box (almost straight out of the box, my nozzle is 0.5mm instead of 0.4mm, but that is unrelated).
the difference is that you need a hotter bed temp (90-120C), no fan for the first 2mm, after that 30% max and about 14 sec min layer time), overstuffed first layer, big brim (>5mm), and the proper temp for your ABS.
finding the proper temp for your ABS is easy: print a thin-walled cube, start at 235C, and increase the temp every 5-10mm by 5C (make markings where it changes)... when finished, try to break it apart, and note where it starts holding together... that, plus 5C is your lowest print temp at the given layer height... generally, lighter colored ABS needs lower temps than darker colors, black usually goes pretty high, 260C or 265C is not unusual.
Link to post
Share on other sites