D-BOT Low Level Glass and Ally Heatbed With Silicone AC Heat Mat

This is the 300mm x 300mm bed set up I'm currently using on my D-BOT.

I've used lower mounting points for the bed support springs which has gained about 10mm in build height. The bed consists of two laser cut alloy plates (3mm and 2mm respectively) which sandwich together a 6mm thick 300mm square cork mat from Amazon for insulation and a 300mm square silicone AC heat mat using M3 bolts.

On top of this sits a 3mm thick borosilicate glass plate, I know the argument with glass and ally beds but I'd already bought the glass on a whim so thought I might as well try it and see how it went, it would be possible to change the thickness of the top ally plate to 6mm and not bother with the glass at all, I may try this one day but this setup works perfectly for me at the moment. I'm able to print ABS with good results and the bed heats up to 120c in a couple of minutes.

The cables for the heater mat exit at the rear centre of the heat bed so I made a cable carrier to support them until they get to the cable chain that takes them down to the SSR, you'll also need to Earth both ally plates for safety's sake, use AC power wisely!!

All the printed parts are ABS, don't bother using PLA or PETG it will just melt if your going to use the bed at temperatures above 60c

I've included a .step file of the assembly for you to tinker around with.