Thermal Runaway / Webcall
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My printer is connected through a ZWave relay that lets me turn it on and off remotely as well as monitor power consumption.
I'm using a 240v heated bed through an SSR and I'm quite aware these things tend to fail open. I have a thermal fuse attached to the bed but wondered if I could add an extra layer of protection.
Is there a way to make Duet do a webcall?
Is there a way to detect thermal run away and then complete an action?
If those things are not possible how does Duet react in a thermal run away situation, would it just turn off the ps control pin? From this I assume so. https://duet3d.dozuki.com/Wiki/FireSafety -
@dm86 no, you can't currently make a webcall from the duet. You could make a request to it for information and monitor it that way.
The most likely way the bed would fail is the SSR would fail closed. If that happens, the duet would have no control and the bed would continue to get hot. -
If the thermal runaway condition creates an error message, then you can detect it and make a web call with my NodeDSF solution.
You can configure NodeDSF to watch for status changes or error/warning messages containing specific text, and then trigger a http post/get, or fire mqtt, or send an email, etc etc.I know that heater faults create error messages, but I am not sure specifically what happens on a thermal runaway - I have found that normally any issue will create an error or warning message.
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