I use a solenoid in the m8 and a relay to start the compressor in the m7. I’m running a detail cutout. First, I want to engrave without air supply and in the liteburn settings I set the air assist to be turned off on this layer, then when it goes directly to the cutting layer with the air assist checkbox checked, I want the compressor to turn on with the help of a relay and the solide opens. I tried to register the simultaneous launch of both M7 and M8 in the G code settings, but the code that is in this section works out at the very beginning before starting work on manufacturing the part as indicated in your screenshot. Is there any way to make the M7 and M8 launch together.
That’s not possible using normal configuration, I think. It’s not forseen to have individual control for both M7 and M8. Another drawback is that you only have M9 that turns off both.
I see two options:
- wire both to the same output (like M8) (makes most sense to me)
- use a “custom gcode” device in LightBurn, then you might be able to set “M7 M8” as start command for air assist.
But in any case, both ports will be turned off at the end of each layer, since M9 is sent then.
The load on the port will be high and the developer does not recommend doing so. And still everything will turn on at the same time.
Use two relays and one signal to control them. Simple as well. Just wire the signal wire to two inputs of two relays at once. Or even more if you need.
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