If you are running a firmware with WATCHDOG, you can wire a momentary switch in parallel with one of your thermistors. A press of the button shorts the thermistor, which halts ALL functions of the printer until a RESET is performed.by beebenutz - RAMPS Electronics
Hello, I was having a similar issue. I tried the servo deactivation delay too. What ultimately cured my jitter was to solder a small capacitor to the positive and negative leads for the servo. Positive of capacitor to positive servo lead, Negative to negative. This acts as a sort of filter for electronic noise. Hope this helps someone!by beebenutz - Firmware - mainstream and related support