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Increasingly, I get requests for larger prints in ABS.

Often, after printing for a day or longer prints either crack along layer lines or start warping around the corners. This of course is very annoying if your printer has already been working on that particular print something like 30 hours.

For the record, I do print these prints at the max. suggest printtemp from the manufacter and am using a heating bed with lots of glue to keep the prints in place. Yet, still, these problems reoccur. My printer are all enclosed except for the top, although I did make some covers to close up that as well.

Does anyone use a printer with a heated chamber? And if so, does this help on these kind of prints?

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I believe you need a larger heat block for ABS to print larger models. I modified my S5 and added a second power supply with another heating element. My custom heat block is around 30x30mm with two heating elements and everything sitting in an open top enclosure. Stock S5 bed goes only around 80c, the second power supply didn’t help with the bed because of DC voltage, changed to AC 24V and gets to 110c in 3 mins. For ABS my extruder temp is 245c, no cooling, 60mm/s for most settings and 30mm/s outter shell. Bed is glass, always cleaned with Windex before print, preheated and no glue used for glossy bottom, for matte finish I use hair spray just to make the glass surface uneven. My largest ABS print in one piece was a part of a race car engine around 480x330x290mm for like 5kg and it turned out near perfect. Took 5 days I think. And never take out the print before everything is cooled down to room temperature, a little patience goes a long way…

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Thank for the response.
How did you print a 480x330x290 on a S5?? :slight_smile:
But more important, how did you fix a second heater to the printer.