3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: or !functionalprint@fedia.io
There are CAD communities available at: !cad@lemmy.world or !freecad@lemmy.ml
Rules
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No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
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Be respectful, especially when disagreeing. Everyone should feel welcome here.
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If you need an easy way to host pictures, https://catbox.moe/ may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is 
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Could you not just do something similar to what printers with mains heated beds do and run the bed/hotend heater to a relay and different power bank?
Sure, but on these fully DC printers all the power control hardware is integrated into the main board and supplied from a single main power rail. You'd have to basically build a separate power control board with that would allow you to isolate those MOSFET's on their own power rail and then jump the PWM control signal over to it from the main board. Decent amount of electronics knowledge and skill required to pull that off.
Yeah but why would you need to do that? You're isolating the second power source behind a relay and switching it using the normal controller.