I have a newly assembled Altmill 4x4 w/ATC and it is working great, but I can’t get it to turn on my dust collector. I have the Flood port wired up to the recommended IOT outlet, but I’m not sure how to actually make it trigger. On my other machine (different brand) I just press the “Coolant” button…

Alas “Event port drops my tool out” has come up before with a third party system. [image] Gsender turning on Switch when spindle activates ❓ Question So you didn’t include any relevant information about your hardware setup here but I’m going to use the assumpt…

@misquamacus Welcome to the group. I don’t know anything about how the ATC is connected or run by your controller. However, in the tech manual, this is what it says about running things connected to the Flood port: "Flood If you’ve used a ‘Coolant’ output previously, this 5V output still serves t…

You likely have the event out trigger set to an ATC port. Once connected, go to Config → Accessory outputs. You can see the 4 triggers configured ($750 → $753) and the 4 ports ($760->763). These trigger on the firmware side for specific actions, like spindle on, coolant on, etc. [image] If you…

@KGN That’s what I was trying to say. :grinning_face: :grinning_face:

That solved it! Thanks for your help. My experience with the machine, and this software has been great so far. Your documentation and videos are impeccable. That dust collection trigger issue was my only bit of confusion, so it might be worth putting a specific mention somewhere in the ATC documenta…

SLB Flood Port Trigger with ATC

gSender ❓ Question

KGN November 4, 2026, 1:42pm 5

Alas “Event port drops my tool out” has come up before with a third party system.