Started some printing today and noticed that 11amp power terminal on my RAMPS 1.4

3D Printing
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1

Started some printing today and noticed that 11amp power terminal on my RAMPS 1.4 board was very hot to the touch.

I shut things down, took a look at the wires which terminate in a screw terminal block on my ramps board. Nice black coating… Looks like the screws were a little loose and caused some arcing which created a high resistance connection.

I’ll get back to printing later tonight and see how things turn out.

Just a reminder to check things out occasionally.

2

Yep. Same thing happened to me last year. If those connections aren’t good and tight the current ends up just passing through a few whiskers of copper, these heat up quite well and lead to smoky smells.

3

I added a relay to take the load off of the board to the heat bed.