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urosv

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  1. I fixed the problem. Since all measurements indicated that everything is ok i tried last one thing. The junction part of the heater cable was overheated and contact ware overheated also, so i replace the wires and solder them directly to heatbed and on the main board at the opposite side. So bad junction was the problem !
  2. Heater impedance = ~4ohm Voltage on heater cables: 24V (output at arduino side and voltage on heater) Current: 0A (no current) ---------------------------- already 1. changed cables 2. resolder wires at bedheater 3. re-measure twice everything Any suggestions ?
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