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heat bed wiring/ only half of it is heating up

Posted by sungod3k 
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sungod3k
heat bed wiring/ only half of it is heating up
September 25, 2014 07:10PM
Hey,

For the 1st time Im using a MK2 heated bed now. However only one half (the part between the leads and the middle) of it is heating up in my 12V setup. I was just about to send it back when I read the following sentence about the MK3
Quote

When connecting the heatbed in the 12V setting it is important that you connect solder pad 2 and 3 directly on the heatbed.
I didnt find any reference of such a bridge for the MK2. Can someone clear this up for me?

Cheers

Edited 1 time(s). Last edit at 09/25/2014 07:26PM by sungod3k.
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Andrew Smith
Re: heat bed wiring/ only half of it is heating up
September 25, 2014 07:54PM
Some MK2s are also designed for dual power, there should be a silkscreen telling you what connections to make. Normally, for a 12V connection, you put 12V on pad 1 and GND on pads 2 and 3.
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pushthatbolder
Re: heat bed wiring/ only half of it is heating up
September 25, 2014 11:51PM
Check all the lines on the board, make sure they are not shorting out half way through its circuit.
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sungod3k
Re: heat bed wiring/ only half of it is heating up
September 26, 2014 12:12PM
aha yes now that I look at it i see the minus on 2 and 3. thanks
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AleFachini
Re: heat bed wiring/ only half of it is heating up
February 21, 2016 03:17PM
I have the same problem but i connected the heated bed properly, and i have 3.6 ohm between (1 VCC) and the( 2-3 GND) with 12 Volts, my ramps is giving 3.78 AMPS outpup, please help

Edit, well this is awkward, i had 0 ohms between pad 2 and 3 then i just de-soldered and soldered again and it started working :/

Edited 2 time(s). Last edit at 02/21/2016 05:28PM by AleFachini.
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