TRIAC for AC Bed Control
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Hello,
Currently have an E3D Toolchanger and would like to stabilize the bed temperature control. The bed is an 800W mains AC powered heater, controlled via bang-bang mode through an AC SSR.
Because the bed is controlled via bang-bang, the bed fluctuates in temperature up to ~[+2,-0]C. I think something like a PID controlled heater (PWM) feeding into an AC TRIAC board might be able to resolve this issue an provide greater temperature stability.
Has anyone tried something like this (or recommend an alternative approach)? If so can you recommend a breakout board for this?
Thanks!
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@Merlin246 An SSR will work fine in PWM mode - just set the PWM frequency to 10 Hz (which used to be the default frequency for bed heaters). I'm not an expert but I think you'll find that a solid state relay is probably a triac in any case, or at least a variant thereof. Probably best to make sure that the SSR is a zero crossing type. My own 800W mains powered bed has been running in PWM mode via an SSR for about 5 years without any issues.
