I had to source a 300x300 heatpad for my new bot and all the

3D Printing
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I had to source a 300x300 heatpad for my new bot and all the ones I found in the states were $40-50 plus shipping so I hit up a few suppliers on Aliepress and these guys came through with a 300x300 270W pad for $38 including shipping. I told them they should list some common sizes and so they did. The pad I have is good quality (as far as I can tell), these folk are the people that supply QU-BD with their heat pads.
http://www.aliexpress.com/store/product/200x200mm-24v-200w-Silicone-Heating-Pad-Heater-With-100k-thermistor-For-3D-Printer-Bed/709519_1354863110.html

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@Thomas_Sanladerer What’s your thoughts on having a section for this sort of stuff? I know it might encourage spammy marketing things but when I find a great deal, I like to tell people.

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I also bought one from there. 150x150, thermistor, 300mm leads and shipping for $28. Qu wanted $48

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How do you use these silicone heaters ? Glue on glass ?

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@Shachar_Weis they have a 3m adhesive backing and you could adhere it directly to glass but I’d recommend a thin sheet of Aluminium to spread the heat more evenly and allow you to remove the glass.

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Nice find. They also have circular pads, useful for delta printers.

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Hm, links like these would helpful for pretty much everyone building a bot. As long as it’s very clear what is ok to post and what is not, i’d say go for it!
@ThantiK ?

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I recently built a 12"x 12" build area I ended up using 2 x 11 1/2" lengths and 2 x 10" lengths of 14ga nichrome connected with but ends and 12ga copper i stripped insulated with kapton. I hook it directly to the 12v 750watt server power supply and max at 125 c heat time is under 30 minutes my wire element is kapton taped to the bottom of my 12" x 12" x 1/4" aluminum plate and 3mm glass square is held on top with a few bulldog clips.

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i made some MK2a heated bed with 328328mm size, printing size 300300mm, suggest use 24v.