Heatbed Power issues
So I recently got an MK3S MMU2S and just recently it's started having issues with the heatbed. Sometimes the power LED on the bed will just randomly turn off for a few seconds and then turn back on or it the temperature readings will start jumping around briefly before stabilizing again. This seems to occur with no pattern, it can happen while heating up to start a print or during a print. But it only seems to happen with higher temperature filaments (PETG or ABS). I've undone and redone all the cables to the heatbed from the control board and wiggled the wires around and have been unable to cause the issue by flexing the cables. Any advice?
Thank you
RE: Heatbed Power issues
Do a bed PID calibration at the temperature you print the most. It's been a while, you may have to use Pronterface to issue the cal command.
RE: Heatbed Power issues
What does the PID calibration do?
RE: Heatbed Power issues
Causes the printer to learn the heating characteristics for better temperature control.
RE: Heatbed Power issues
Ok. I'll try that but it seems like this might be more of a power supply issue since the bed seems to power on and off randomly and also the temperature readings glitches out.
RE: Heatbed Power issues
By the way - blinking is normal, it shows the electronics are working and doing their job.
RE: Heatbed Power issues
I understand that blinking is normal but the light will just turn completely off while the temperature is significantly below the target temperature for upwards of 10 seconds and then the temperature readout will start to jump rapidly around, like it might jump from 85 to 70 and then to 80 and then back to 85 within a few seconds .
RE: Heatbed Power issues
Temps jumping tens of degrees is usually a bad or dying thermistor. They go intermittent before failing 100%. First, verify all the connections are good, inspect the crimps at the EINSY end connector, hold the housing, then tug on each wire to see if one has come loose. Also, the cables have a flex lifetime, they can break somewhere between the bed and the EINSY. You can watch the temp and wiggle the harness midway and look for any erratic readings. If the connections are sound, then a new thermistor for the bed may be what's needed.
RE: Heatbed Power issues
I just got this kit two weeks ago. What should I do?
RE: Heatbed Power issues
contact prusa support in chat ( in shop.prusa3d.com)
RE: Heatbed Power issues
Log in to the Prusa Shop, and in the lower right corner you'll find a small CHAT window. Open it up and tell the person what's happening and they should be able to help. You MUST be logged in to get the CHAT option.