I’m running Marlin 184.108.40.206 on an SKR mini e3 v1.2, at 24V, with a hexagon-style hotend. I was printing with it yesterday and this morning, but after a spaghetti mess this morning, I’m getting overshoot and oscillation on extruder temperatures.
Despite multiple PID autotuning cycles, the hotend is not stabilizing enough to start a print. I’m not sure what changed. For a setpoint at 205⁰, I’m watching it bounce between 199⁰ and 216⁰. This makes me think that the PID autotuning cycle isn’t finding the right values — but also I watched the temperatures during the auto-tuning cycle and they stabilized. I’ve never had this problem before.
I’ve tried changing the PID values manually following suggestions at https://reprap.org/wiki/PID_Tuning for this problem, but I’m not seeing any change in thermal cycling behavior.
Any ideas what I could check?