PCB heated print bed

by josefprusa, published

PCB heated print bed by josefprusa Apr 9, 2010


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PCB heated bed. I'm working on this idea for nearly two months, inspired by http://www.neufeld.newton.ks.us/electronics/?p=864 .


tested at 110W and its working flawlesly, gives 108°C in few mins
Now I'm working on great mounting solution

This is V4

  • 22x20cm hated area
  • you can select what resistance you want 1.3ohms (110W at 12V) or 21ohms
  • you dont need any steel or aluminium on top, just plane kapton tape

(I'm testing it at 21ohms setup with 55V PSU which gives me 144W and about 110-120°C, will test with 12V soon and I'll give a report)


etch it on FR4 35um copper board, should cost about $20 or if you are interested email me I can probably etch some for you. Not tinning or copper plating, this would lower the resistance.

There are 4 resistors on the board, final resistance depends how you connect them by solder bridges. Parallel -> 1.3ohms. Serial -> 21ohms.

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I need a recommended way to supply power to this and regulate the temp.I blew out my extruder controller connecting it directly :(

Thats obvious, it consumes 10A you need good mosfet and beefy cables :-)

Have you posted a solution anywhere for controlling it with mendel electronics + thermistor?


BRD file extension is Eagle CAD extension ?