At the moment I'm collecting infos for building a SLS 3D printer and I think the most complicated part to build will be the heaters for the powder and the heat resistant chamber.
I saw on eg. the Sinterit Lisa that the powder is heated from the top with IR lights which I think will be easy to realize.
But they write the pistons and cylinder is also heated which I think could be a bit complicated. (For heated pistons I could maybe use high power silicone heat pads.)
Now my question:
Is a heated cylinder necessary or would the IR heater + Heated build bottom be enough?