laser shutoff with door open safety switch by breaking PWM wire

Creality Falcon Creality Falcon
1

I am hoping to add a safety override switch to the door on my DIY enclosure.
I see there are 3 wires going to the laser - PWM, GND, and VCC.
can anyone confirm that if I break the PWM wire that the laser will be turned off?
that way I can put a simple microswitch on the door that connects PWM lead when the door is shut, and breaks that lead and kills the laser when the door is open any amount.

2

I’m annoyed at the laser unit is being killed when the door is open. I can understand when its actually being used but when its just framing you should be able to open the door and do little adjustments to the item without the machine beeping is arse off. I’ve got protection goggles from my old falcon so I can still be safe with the doors open. easy way is just to get another magnet and put it over the magnets on the machine and it will think the doors are closed.

3

Unfortunately, a door switch doesn’t know when you are just framing or when your laser is on full blast. So either it reacts to you opening the door, or it doesn’t.
There is no in-between.
I guess it depends on everybody, the surounding, who is next to you when you use the laser, etc…
But yes, I understand your annoyance - and I agree you should be able to move your piece when framing.

4

I think they should add an function to design space where if you are just framing with no laser power then it lets it be used with doors open but if you turn the laser on it beeps and wont work. even if its a setting tucked away in the advanced settings to enable the doors to be open while the laser is not powered but lets you still move it and frame. as they would be able to add that function with a software and firmware update.

5

I think this isn’t managed by software, but rather by physical/electronics parts - when no conductivity (magnet removed from the switch) it just cuts the power signal to the unit.
But yes, they could potentially add some logical electronics to control this.

6

Thanks for the responses.
I have a 10W unit that did not come with an enclosure.
And I want to make an enclosure and add a cutoff safety switch so a worker can swap out parts and be guaranteed safe,
So my question is about the correct way to wire the switch electrically:
break the PWM wire, OR break the power wire