Adding simple chamber heater to X1C

[JayZay]

Hi.

I’ve never had an issue with BL PC in the X1C, yet the comparison may be unfair as the print design can significantly impact the thermal gradient.

If you feel the issue is caused by low chamber temperature, I would advise trying a passive solution, such as improved thermal insulation. @Olias already shared a few solutions.
You may take other ideas from:
Best practices for thermal insulation? Maximum chamber temperature? - #9 by GekoPrime

If the insulation is not enough or the active chamber a must, trust @Olias as to forget simplicity. The heating system may be simple, but the proper integration into the X1C is challenging.

@RocketSled

electronics bay isn’t very isolated from the chamber

This would also be my main concern. Even if there aren’t immediately noticeable problems, I expect the electronics to have a shorter lifetime.
You may take a look at some interesting thoughts about the X1C component’s temperature limits:

Actively heated chamber

I’ve been playing around with heating the chamber on a spare X1C for a while and here’s what I’ve found: I’ve been running an X1C at 60°C for a few hundred hours now without issue. I would not recommend higher without swapping to high temp steppers as they’re running at ~87°C at 60°C chamber temp. Assuming they’re class A then the insulation is good to 105°C but that’s the windings, the 87°C I measured on the case is probably already pushing it. When the chamber temp exceeds 70°C, the h…

I would start to design a heat insulation system for the electronics (at least for the ones possible). The main challenge may be the available space, but I guess adding some EPDM-based sheets and a fan for improved convection is possible.

With a properly thermal-insulated printer, the heat demand will be lower.
The ideal heating device(s) should be small for easy installation, allow modularity, and entail some "logic, " i.e., be controllable. A few options will suit the requirements, but I would first look at the printer’s thermal performance after the insulation mods for proper dimensioning.