<![CDATA[SoliForum - 3D Printing Community — Instructions for MK2a Heated Bed Upgrade?]]> 2015-07-25T14:27:11Z PunBB https://www.soliforum.com/topic/11759/instructions-for-mk2a-heated-bed-upgrade/ <![CDATA[Re: Instructions for MK2a Heated Bed Upgrade?]]> That heater alone is around 100 watts, all you can do is add up the rest.  Should be alright but the SD PSU isn't exactly known to be robust.

]]> https://www.soliforum.com/user/2291/ 2015-07-25T14:27:11Z https://www.soliforum.com/post/102017/#p102017 <![CDATA[Re: Instructions for MK2a Heated Bed Upgrade?]]> I have the original SD3 with the Sanguinolou board and the 150W power supply (12 @ 12.5a).  Can I connect this MK2B to my printer or do I have to upgrade the power supply and/or motherboard?

]]> https://www.soliforum.com/user/11574/ 2015-07-25T07:50:23Z https://www.soliforum.com/post/102006/#p102006 <![CDATA[Re: Instructions for MK2a Heated Bed Upgrade?]]> Check your PM

]]> https://www.soliforum.com/user/2291/ 2015-07-21T22:23:14Z https://www.soliforum.com/post/101683/#p101683 <![CDATA[Re: Instructions for MK2a Heated Bed Upgrade?]]> There doesn't appear to be any damage at the board.  I'm guessing the short was right in the plug.  You don't want to replace that plug with the same thing.  Those are junk and all you need is anything with the same pitch (distance) as what the pins are.  If you really want to get fancy you can go to https://www.pololu.com/category/19/connectors and make your own but you'll need to buy the appropriate crimper.

]]> https://www.soliforum.com/user/2291/ 2015-07-21T22:22:06Z https://www.soliforum.com/post/101681/#p101681 <![CDATA[Re: Instructions for MK2a Heated Bed Upgrade?]]> wardjr wrote:

So you pulled the red plug off of the board?  Can I get a picture of that from a more top down angle.

Sure.. It was so melted it pretty much disintegrated. So I'll need a new connector, if you happen to know what that connector is called I can order one up, also which relay do you recommend if that is indeed what I need to do.

]]> https://www.soliforum.com/user/9405/ 2015-07-21T20:28:51Z https://www.soliforum.com/post/101672/#p101672 <![CDATA[Re: Instructions for MK2a Heated Bed Upgrade?]]> So you pulled the red plug off of the board?  Can I get a picture of that from a more top down angle.

]]> https://www.soliforum.com/user/2291/ 2015-07-21T20:03:26Z https://www.soliforum.com/post/101670/#p101670 <![CDATA[Re: Instructions for MK2a Heated Bed Upgrade?]]> Just got the melted junk off of there and tried putting the wires directly to the pins, it's still heating up (the wires). Maybe it's wired up wrong.

]]> https://www.soliforum.com/user/9405/ 2015-07-21T19:49:18Z https://www.soliforum.com/post/101667/#p101667 <![CDATA[Re: Instructions for MK2a Heated Bed Upgrade?]]> wardjr wrote:

Proceed with a picture, then order a relay to decrease the load on the board.
Or are you saying it is shorted on the board?  Does it seem alright with the heater unplugged?

Yeah, it melted on the board end. It was totally fine without the heated bed plugged in. When I went to disconnect the wires from the board I noticed it had already been melted a little.. must have been what shorted out the other bed. In either case, that connector is now completely shot so I pulled out the wires, I couldn't get it off the board before anyway because it was already slightly melted. You can see some of the kapton tape they already have in place in this picture. I assume it was to prevent the short.

]]> https://www.soliforum.com/user/9405/ 2015-07-21T19:09:11Z https://www.soliforum.com/post/101663/#p101663 <![CDATA[Re: Instructions for MK2a Heated Bed Upgrade?]]> Proceed with a picture, then order a relay to decrease the load on the board.
Or are you saying it is shorted on the board?  Does it seem alright with the heater unplugged?

]]> https://www.soliforum.com/user/2291/ 2015-07-21T18:58:08Z https://www.soliforum.com/post/101662/#p101662 <![CDATA[Re: Instructions for MK2a Heated Bed Upgrade?]]> Alright, hooked it up and started the bed, the connector on the printerboard started smoking. It looked like it was already shorted there in the first place. When I tried to take it off earlier it looked as if it had been melted a little, so that is likely what blew my original board. I can see that when I got it from the factory there already some kapton tape on there from where they must of been trying to prevent the machine from shorting out. Not sure where to proceed from here.

]]> https://www.soliforum.com/user/9405/ 2015-07-21T18:46:58Z https://www.soliforum.com/post/101660/#p101660 <![CDATA[Re: Instructions for MK2a Heated Bed Upgrade?]]> Excellent! Thanks everyone. Just waiting on the RTV to set and then I will plug it in and see what happens.

]]> https://www.soliforum.com/user/9405/ 2015-07-21T16:41:59Z https://www.soliforum.com/post/101634/#p101634 <![CDATA[Re: Instructions for MK2a Heated Bed Upgrade?]]> heartless wrote:

on the old ones it didn't really matter which wire went where. Same for the thermistor.

On this MK2, make note of which wire is placed where - perhaps some black heat shrink on the far end of the negative wire to help you remember and you should be fine.

Dont forget to build in some strain relief for those wires on the board. make small loops and tape them to the underside of the board so the solder joint is not stressed with movement.

+1..there is no polarity on either the PCB heat traces or the thermistor...

Also, run a thin strip of Kapton tape across the soldered joints to protect from shorting.

]]> https://www.soliforum.com/user/131/ 2015-07-21T15:48:54Z https://www.soliforum.com/post/101625/#p101625 <![CDATA[Re: Instructions for MK2a Heated Bed Upgrade?]]> on the old ones it didn't really matter which wire went where. Same for the thermistor.

On this MK2, make note of which wire is placed where - perhaps some black heat shrink on the far end of the negative wire to help you remember and you should be fine.

Dont forget to build in some strain relief for those wires on the board. make small loops and tape them to the underside of the board so the solder joint is not stressed with movement.

]]> https://www.soliforum.com/user/10399/ 2015-07-21T15:42:48Z https://www.soliforum.com/post/101624/#p101624 <![CDATA[Re: Instructions for MK2a Heated Bed Upgrade?]]> grob wrote:

(6) Solder wiring onto PCB bed - instructions are printed on the bed. Note Solidoodle is 12V.

There actually aren't instructions for soldering on the MK2a but I just took the two wires from the original heated bed and soldered them to the two terminals. Like in the attached picture. Is that correct? The thing that is confusing me is that both the wired were red on the original heated bed.. and both of the thermistor wires are black.

]]> https://www.soliforum.com/user/9405/ 2015-07-21T15:35:48Z https://www.soliforum.com/post/101622/#p101622 <![CDATA[Re: Instructions for MK2a Heated Bed Upgrade?]]> grob wrote:

On my SD3 I thought this was fairly simple in the end... I taped the new bed on top of the aluminium plate, and now use glass directly on top of the PCB heater. It's much hotter than it was!

Great post! Very detailed. I appreciate it. Looks like I need some double sided tape and maybe a new power supply.

]]> https://www.soliforum.com/user/9405/ 2015-07-15T13:48:19Z https://www.soliforum.com/post/101207/#p101207