AC powered bed heater

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airscapes
Posts: 365
Joined: Wed Jan 31, 2018 11:36 pm

AC powered bed heater

Post by airscapes » Mon Sep 30, 2019 8:20 pm

Anyone ever update the M2 heated bed to use an AC powered heater? This thing is really painful waiting for it to reach 110C with the stock DC heater.

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ednisley
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Re: AC powered bed heater

Post by ednisley » Thu Oct 03, 2019 8:15 pm

airscapes wrote:
Mon Sep 30, 2019 8:20 pm
an AC powered heater
Imagine the excitement when a wire carrying line voltage frays and shorts to something else in the braided sheath!

Instead, use the RAMBo's MOSFET to control an off-board DC-DC solid state relay, rewire the heater to run from a (somewhat) higher voltage external power brick, and tune for minimum smoke. I have a hotrod M2 platform, but the principle applies:

https://softsolder.com/2013/10/11/maker ... hermistor/

https://softsolder.com/2014/06/05/maker ... oah-powah/

Image

When the wires fray, the result won't kill you.

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