I was wondering if there is any easy/cheap DIY solution for creating a very big heated bed ?
My CNC bed is about one square meter, but most commercial heating beds are only 30x30 cm.
From my experience, big PLA prints are warping if I don’t use a heated bed. My CNC’s purpose will be to print huge things, so a huge heated bed will be necessary.
I’m wondering if anyone already did this, if you have some interesting links to share or valuable experience.
For now, I’m considering building a heated bed using aluminum sheets and hot water circulating inside. Ideally, I would need to reach about 60 degrees celsius, but it needs to be homogenous and quite constant. The advantage of hot water being that it has quite a bit of inertia, which helps with monitoring. The inconvenience is that it is hard to control the heat flow and I believe I may need several heat sensors, so managing them will be an issue.