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Heated Build Platform build

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Just a quick update on my build - I now use a 360 watt industrial PSU from China and it works like a charm! I'm still using the automotive relay and the setup works perfectly for both PLA and ABS now. The bed heats to 120C in 5 minutes and I was able to fit it nicely beneath the Ultimaker by printing these feet that Bernard posted some time ago:


I'll post an update on the build as soon as I have the time required :-)


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I'm still not clear why you don't use AC current in your HBP; seems more efficient since the bed is a resistor and they don't care about the frequency component of the current... Yes there is a "dangerous voltage" issue but surely it's not hard to make an enclosure for the relay/wiring? Just get one of those project boxes from radio shack, or print something. I use AC and a couple of solid state relays for my heated platform (using 120 ohms of aluminum clad resistors JB-welded on an aluminum plate) and it works great, plus it was super easy to make.

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