I bought this type of relay to turn my router on and off: Amazon.fr
These work perfectly with my MPCNC (Rambo board) for starting my plasma torch, but I can’t get them to work on my LR4 / Jackpot 3 / router. I must be missing something very simple because the relay’s wiring is simple (3 wire : 5V power supply (+ and -) and signal, and on the other side 2 wire to cut the power to my router via NO).
Which pins do you connect this relay to? (Pin 27, and I tried the center pins, but it seems like there’s no voltage there?)
Are they disabled by default?
Have you updated your config to map GPIO 27 to the router so M3 and M5 will start/stop? If so, it may help to share your config settings.
On the hardware side, can you give the relay side 5V from a constant source to test the relay? You should hear the familiar click of the contactor when you test it.
Hmm, I am still learning myself, but from what I understand is M3/M5 is the general spindle on/off commands while the M62/63 codes are for the general purpose GPIO switches for any other accessories you have connected.
A small difference with differentiation. M3 I believe is what’s called a “queue buster” so it will stop motion and turn on the spindle. The M62/63 codes are either synchronized on/off. Then M64/65 codes are for immediate on/off with motion (which fluidNC doesn’t recommend).
I don’t know how much of a difference that is in real life, but by default all of the CAM software outputs M3/M5 for spindle on/off.