Now this is a new one for me…RH keeps disconnecting when getting to a certain temp.
I’m running RH on a Mac connected to a wooden PB Simple. I’ve been printing for hours on end for the last year and today I ran into a really odd problem 2 hrs into a print.
It seems that RH keeps disconnecting from the printer. I swapped USB cables, even loaded up RH on a Windows machine, checked electrical, etc.
What I’ve found is that I can connect to the printer and when turning the temp on for the extruder it will get to 197.7 and then start dropping in temp and within 2-3 seconds disconnect.
I tried reflashing the PB board and still get the same problem. Kind of frustrating cause the last item I was printing today was a direct drive extruder for my reworked prusa (ugh). Nothing’s changed on the printer, it hasn’t been moved in months, and the hot end is only a few months old (same Ubis model).
Check the terminal output. It’ll let you know if heat-up logic is kicking in and protecting you. Also double check thermistor wiring, etc. This is very likely to be a wiring problem, and I’ve certainly had some wiring issues that were very well hidden at times.
Marlin/Repetier Firmware has a couple of protections built in, so that if it doesn’t see enough of a temperature rise after a certain amount of time, it assumes that the thermistor has fallen out of the hot end. This has been the cause of at least 1 persons house burning to the ground, or so is claimed. This can cause the hot end to think it’s getting warmer, but it never actually reaches temp, and can cause catastrophic failures.
Well, as always you guys were spot on. I rewired the new PS I had for the Prusa to connect to the Simple and problem solved.
Power issues crossed my mind earlier today as I had even connected the printer directly to the wall (by passing my surge/power strip) and I’d even see where my 2nd monitor would get horizontal lines as the printer got closer to temp. At first I thought it was interference from the USB cable but wondered about power so I started disconnecting things, but it didn’t fix anything.
I never would’ve thought the Simple’s power supply would be acting up. @ThantiK , I’d watched event logs earlier today and there were no alerts, but I could see where RH was trying to get to temp as it would get to 197’ish, then start to drop, then start to rise again, then it would just say command waiting and no longer have connectivity to the printer.