How to keep the air on after a cut

[Stroonzo (Jeff)]

@andytheandroid

I am just trying to figure out how to get the exhaust to stay on for 10 to 30 extra seconds after the run to get the remaining fumes sucked out.

And it works beautifully. It is one of the best “mods” I have made to the machine (right up there with the LightBurn camera).

Air assist - Delay Relay

Here it is drawn in LightBurn. I have a lot more to mine (controlling blast gates as well as a master line switch), but this is the relevant schematic for you (including a manual override switch allowing for independent operation of the fume extractor and bypassing the necessity for the controller signalling). [image] If you want to download the LightBurn drawing, I have attached it as well. You may want to enable Filled Smooth to view it (Alt+Shift+W). AutoExtractor.lbrn (1.5 MB)