I recently got into 3D printing by building the Folgertech Kossel 2020 Rev B kit and had gotten it working fairly decently. After a brief hiatus during which I installed some new parts (E3D volcano hotend/heater cartridge, new thermistor) I was able to get the printer working well again. However, recently I’ve been having some prohibitive problems:
-Midway through prints, the printer has been suddenly stopping. Additionally, after killing the print and trying to run a G28 command, it would not perform the command properly, though turning the printer off entirely will allow it to execute basic commands (but not prints). I’ve tried everything from different USB cables, running prints from an SD card, isolating the printer’s power supply, different printing softwares (Cura, Pronterface), etc. and nothing has fixed the problem. I never used to have this problem, and it just suddenly started cutting out midway through prints.
-My other main problem is with the PID heating. I’ve run the auto-tune several times (more than I care to count) and have re-uploaded to the board. However, when PID is enabled the hotend will heat up to within five degrees of the target and then fluctuate between fifteen and five degrees below the target. I’ve tried re-auto-tuning, manually changing K (p/i/d) values, using default values, etc. and again, nothing has worked. The hotend heats up fine, and I am able to print using Bang-Bang mode normally, it’s just the PID system that doesn’t seem to be working properly.
The Kossel runs off of Marlin, if that helps at all.
Since you have already changed the usb cable i assume you are now using one of a better quality and not the one tha comes with the arduino kit.check if any of your nema motors gets hot after some time.
