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.
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.
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.


If at first you do not succeed, reload your filament, clean the bed, and try, and try again

My machine - Homebuilt Prusa i3 rework
My best printing resolution - 50 microns
Electronics - Ramps 1.4 with A4988 drivers

GT2 idler pulley concept.
[www.thingiverse.com]
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
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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