Triggers firing by themselves on restart

o_lampe

@rodrigormaraujo
it's not directly related, but " == " is not necessary in gcode meta comparison.

The 'debouncing' method @cosmowave described should do the trick. Maybe adding real pullup resistors will also help keeping the noise down on the trigger line. The internal pullups you've activated with " ^pinname" are probably too weak? (For Duet3 users: it's not recommended to use them at all, AFAIK)

RodrigoRMaraujo

@cosmowave please how can i do this? I have no idea.

RodrigoRMaraujo

@o_lampe Thanks for the tip. I don't really know what resistor value I could use. Can you tell me one?

o_lampe

@rodrigormaraujo
4.7k -10k ohms are common. (that is 4700 -10000 ohms for the uneducated readers)

cosmowave

@rodrigormaraujo said in Triggers firing by themselves on restart:
please how can i do this? I have no idea.

Something like this. You have to addapt this code to your inputs:
This code has to be in the beginning of the Trigger macro!

if fans[0].rpm < 100
            G4 P10
            if fans[0].rpm < 100
                M25
                M118 S"No Water flow!"

RodrigoRMaraujo

@o_lampe said in Triggers firing by themselves on restart:

4.7k -10k ohms are common. (that is 4700 -10000 ohms for the uneducated readers)

Ok, thank you!

RodrigoRMaraujo

@cosmowave thanks for the answer.
Got it, but I'm not sure it would work well, because I check the status (state.status == "idle" || state.status == "busy"). This state will be the same before and after the G4. The problem, as I understand it, is the reading of a false signal through the endstop port, which is apparently extremely sensitive to noise.

fcwilt

@rodrigormaraujo

Are the switches of the normally closed type?

Are the triggers running when you press the switch or release the switch.

I've got plain normally closed switches on both Duet 2 and Duet 3 hardware using the built-in pull-up resistors and have never seen your kind of problem.

Frederick

cosmowave

@rodrigormaraujo said in Triggers firing by themselves on restart:

is the reading of a false signal through the endstop port, which is apparently extremely sensitive to noise.

Eventually you can improve the cabeling (shielded cable)? try to not routing them near to stepper/ stepper cables...

RodrigoRMaraujo

@fcwilt said in Triggers firing by themselves on restart:

Are the switches of the normally closed type?
Are the triggers running when you press the switch or release the switch.
I've got plain normally closed switches on both Duet 2 and Duet 3 hardware using the built-in pull-up resistors and have never seen your kind of problem.

No, I used normally open mechanical keyboard (cherry mx green) buttons.

[https://pt.aliexpress.com/item/1005001681627152.html?spm=a2g0s.9042311.0.0.2742b90a6Tptvm]

A friend commented to me about using NC buttons. I ordered magnetic filters on aliexpress. If the problem persists I will look for these buttons, but I will have to review how to install them on the skirts of the voron.

RodrigoRMaraujo

@cosmowave said in Triggers firing by themselves on restart:

Eventually you can improve the cabeling (shielded cable)? try to not routing them near to stepper/ stepper cables...

I ordered magnetic filters on the advice of a friend who works in electronics and builds cnc machines. According to him, this will help eliminate noise.
[https://pt.aliexpress.com/item/4000803662446.html?spm=a2g0s.9042311.0.0.3366b90aNy53pX]

fcwilt

@rodrigormaraujo said in Triggers firing by themselves on restart:

@fcwilt said in Triggers firing by themselves on restart:

Are the switches of the normally closed type?
Are the triggers running when you press the switch or release the switch.
I've got plain normally closed switches on both Duet 2 and Duet 3 hardware using the built-in pull-up resistors and have never seen your kind of problem.

No, I used normally open mechanical keyboard (cherry mx green) buttons.

[https://pt.aliexpress.com/item/1005001681627152.html?spm=a2g0s.9042311.0.0.2742b90a6Tptvm]

Normally closed setups are less sensitive to noise. Your normally open switches might, perhaps, be the cause of your problem.

Frederick

RodrigoRMaraujo

@fcwilt yes, thank you!