In my previous post (Well, ain't that a &!$@#), which covered the trials and tribulations of installing a LU2-10A 10 watt laser module onto my modified OLM2P (S1). Now that it’s up and running, a new issue has presented itself. With everything plugged in and powered up, the fan on the LU2-10A is quiet (as expected), as soon as a job starts the fan comes on (again, as expected). The problem is that once the job is done and the beam is off, the fan keeps on running (forever) until the power is removed. I can cycle the +24V at the V2.0 OUC universal adapter, which gets me back to where I started (fan off and ready for the next job), but I don’t want to keep plugging and unplugging it. The one other post I found referred to a micro-switch, which is not present on the OUC V2.0 (nor is it visible in pictures of the V1.0). @gilaraujo mentioned putting it in Auto mode, but I haven’t found anything on that.
It may be possible to use Gcode and a relay to disconnect and reconnect power to the V2.0. I’m using a Tim Rothman B-N-B 3 mainboard, that has a 2-pin plug that becomes active (+24V) when the beam is on. It was intended to allow control of an exhaust fan. I can use it to control a relay that would turn on power to the OUC, and then have a few lines of “End Gcode” to leave power on for 30 sec. or so after the job is done.
One last thought. The power brick for the OUC/Laser seems to be back-feeding +24V to the mainboard through the cable that was originally plugged into the 5.5W laser head (and is now plugged into the “IN” connector on the OUC). Is that a potential problem? Could the +24V be disconnected? Should I just leave it be? Any ideas, thoughts or suggestions would be greatly appreciated.