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Thread: Hot bed UM1
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03-30-2015, 03:56 AM #1
Hot bed UM1
I have uploaded marlin firmware to support a heated bed, soldered the 4.7k in place. I use my ulti controller to heat the bed but the red led on the board will not light/flash witch means I can turn on/off my relay to control my heat bed.
any help what mite be wrong?
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