Wiring the Onyx Heated Bed with a CNC Power Supply

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TheMakerGuy

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Mar 24, 2013, 8:13:56 AM3/24/13
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First I turned the voltage on the Pot up to max. So about 13.5 volts.
 
I used 14 gauge wire. Red and Black.
Voltage is DC so Red is positive and Black is negative.
I cut off the end of a regular PC power cord. Don't cut the inner wires.
I left about an inch or so of wire and crimped on some connectors. AC so Black is (L), White is Neutral(N) and Green is Ground.
Connect:
Connect to power in on Rambo. Red 14 gauge wire is DC so Red is Positive and Black 14 gauge wire is negative. Cut the wires as long as you need so that you can place the power supply in the case. Obviously you need to remove the old power supply and you do not have a switch. Do not use the old switch as that is probably not rated for AC and you will burn. You could get an IEC connector and switch and use it in place of the AC wiring and not cut the PC power cord. I am just using a surge protector with a switch right now to turn the thing on and off.
I will be placing it in the case later today. I am not sure how it will stay in but I am sure I can rig something.
 
 
 

TheMakerGuy

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Mar 24, 2013, 8:16:25 AM3/24/13
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So this gets it up to 100c in 20 minutes and 110c in 25 minutes.
I find this acceptable.

DronE Pump

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Mar 24, 2013, 6:18:00 PM3/24/13
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So are you still using the HBP coils in series?   

I just finished hacking a 550W ATX computer power supply on the weekend.  It had 3 X 30A (12.5v) rails so no problem supplying current.  

I will now test how to wire the heater coils to get the temp to go higher.

Mark Cohen

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Mar 24, 2013, 6:40:47 PM3/24/13
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I am still using 3x18 gauge wires on each side of the hbp.
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TheMakerGuy

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Mar 24, 2013, 8:18:52 PM3/24/13
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Here is the power supply inserted in it's spot:
 
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