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Heated Build Wire Support

by mctrivia, published

Heated Build Wire Support by mctrivia Jun 22, 2010

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Summary

The sensor wire broke on my heated build platform so I designed this to prevent it from happening again.

Instructions

1) Use cat6 cable to replace the original 2 cables
-use 2 pairs for the power pins to reduce power losses in the wire.
2) Print suuport
3) Screw into wood base
4) use a tie rap to secure the wire to the end of the support
5) connect other end of cat6 cable to control board.

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Hmm. Could I also use that CAT-6 trick to use standard connectors, and make a quick-disconnect?

I'm not sure if Cat6 has enough (safe) current carrying capability. The heater bed is about 4,5ohm, so at 12V it's drawing more than 2,5A. Or is it pulsed enough to keep it safe?

Each wire in a cat 6 cable should be able to handle 4.7A.

I recommend using 2 for the power wires that is a 9A max. The wires have a resistance of 0.067 Ohm/m I suggest using 2 wires for the power lines so the second line will cancel out the return path length meaning the power loss is 0.4W with a voltage drop of 0.2V

i have been thinking of respinning the heated build platform with a surface mount cat6 connector to do just that. would make a lot more robust.

Use one of those molex connectors, mounted such that it sticks out one side.
I rolled my own heated bed with a cable from a power hookup from a big scanner, and the connector rocks.

I'm not sure where to get molex connectors, but I have spare ethernet connectors (male and female) lying around. 8-)

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