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10-13-2016, 02:24 PM #6
Incidently... I killed my RAMPS board on my Folger Tech i3-2020 printer. I'm not sure how it happened, but I might have shorted something on the Bed Heater circuit. I had a previously killed RAMPS board from another printer in my spare parts pile. I de-soldered two of the MOS-FET's from the other RAMPS board and transplanted them on the freshly killed board. I put one MOS-FET where it normally goes. And then the other MOS-FET got soldered on the bottom of the board to the same pads. So now I have two MOS-FET's switching the bed current.
I know some people are cringing. But I did look at the current / voltage curves for those MOS-FET's. And when the bed is heating up, I can feel each of the doubled up MOS-FET's getting warm. But they are much less warm than they used to get. Just doubling up the MOS-FET's does seem to work and not stress them as hard.
New to 3d printing looking for...
05-20-2024, 12:56 AM in Tips, Tricks and Tech Help