The laser is always on when I close the lid

Good morning
I have a problem with the k40 laser
everything worked fine but the next day the laser does not turn on anymore even if I press the test button on the power supply
today I moved the connector on the trocen awz 7813 controller to another controller port (attached photo before it was in 1 after today moved in 2) and if I press the test button on the power supply the laser turns on but when I close the laser cover the laser is always on G and P are connected to the interlocks but when I open them they keep the laser on I do not understand what happened I have searched for information but I have not found solutions

I am not an expert on the AWC7813 controllers internals but have some knowledge of the LPS.
I doubt you can just change controller ports without changing something in the controllers configuration.
I would put the plug back in 1 and then we can troubleshoot the LPS in that configuration.
We can verify if the LPS is good independent of the controller.

You said that with the plug in 1 the laser does not fire with the button down on the LPS.
#1; true/false?

With main power ON, does the laser fire with the button down on the supply if you unplug the connector going to (1)
#2: true/false?

Please post pictures of the LPS showing the connector side wiring.
Do you have a DVM and know how to use it?

I answer you questions

You said that with the plug in 1 the laser does not fire with the button down on the LPS.?
true

With main power ON, does the laser fire with the button down on the supply if you unplug the connector going to (1)?
false

Do you have a DVM and know how to use it? a little

i connected
everything as when the test button on the power supply worked did not turn on the laser

thanks Donkjr for your kind availability



If 0 V or a 0% PWM signal is going to IN, pressing the TEST button will seemingly do nothing.

If the power supply or control panel have an activity LED, that will come on, but that’s all you’ll get.

I’m not sure what happens if nothing is connected to IN. You probably need a potentiometer if you want to test the power supply on its own.

Disconnect plug #1 from the controller.
On the LPS connect the IN pin to the 5V pin (right of the IN pin).
With power on push the test button on the LPS and see if the laser fires.

Does the laser fire?

yes Donkjr
the laser shoots
pin IN to pin 5V the laser works

This means that the LPS is good.
It looks like the IN pin is not getting any IN voltage when it is plugged into the controller.

This is a K40? Did it come with this controller?

no the original controller is LIHUIYU M2 Nano

what do you say Donkjr I burned the controller?

Not saying controller is bad …yet.
Just wondered how this is actually wired since K40’s don’t usually come with this conttroller.

How do you normally do a test fire from the console using this controller?

If you use that method now does the laser fire?

no Donkjr
this controller was bought later
the original controler is LIHUIYU M2 Nano

when i press on laser on the screen (see photo) and the lid is closed it does not work the laser does not turn on with plug 1 connected to the controller

As a check,
-this used to work?
-If so what changed between when it worked and when it stopped working?

What is the Power set to in the “Power Area” of the display?

  • Power min setting = ???
  • Power max setting = ???

image

We will want to do these tests.

Test #1 Setup
Turn off the machine.
Connect your DVM as such:

  • Common probe (black) to the GND pin on the LPS.
  • Probe (red) to the “IN” pin on the LPS.
  • Set meter to read Volts on a scale that will read 5vdc *

Test#1

  • Turn on the machine
  • Set the power to 100%
  • Ensure all covers are closed
  • Push the LASER button on the panel while watching the DVM.
  • It should read about 5vdc while the button is pushed

Test#2 Setup
Turn off the machine.
Connect your DVM as such:

  • Common (black) to the GND pin on the LPS.
  • Probe (red) to the “TL” pin on the LPS.
  • Set meter to read Volts on a scale that will read 5vdc *

Test#2

  • Turn on the machine
  • Set the power to 100%
  • Ensure all covers are closed
  • Push the LASER button on the panel while watching the DVM.
  • It should read about 0vdc while the button is pushed

*Post a picture of the front of the meter (DVM) you are using so we can ensure we are giving the right setup instructions.


Test #1 Setup


Test #2 Setup

when I touch the test button on the panel nothing happens in both tests Test #1 Setup Test #2 Setup

maybe yes and I burn something in the controller where the 3 wires that go from the LPS go to the controller arrive? (GND IN TL)

Please ensure you answer all questions;

Just to be clear:

You said:

Do you mean the LASER button in the function key area of the touch panel?


New Questions:

What does the voltage read on TL of the LPS? [read with DVM from ground to the TL pin]

  • With power on.
  • No buttons pushed

from ground to pin TL the DVM reads (0000) zero with or without touching the laser touch button on the control panel

the maximum laser power was set 20% and minimum 10% then I set 100% minimum and maximum to do the test you suggested

I don’t know what happened from when it all worked to when it stopped working

when the connector with the 3 wires that go from the LPS to the controller is connected (GND IN TL) even the test button on the LSP does not work

Let me summarize what we know:

A: With the 3 pin plug in position #1 and power on:

  1. Laser will not fire with the LASER button on the panel.
  2. Laser will not fire with the TEST button down on the supply.
  3. The TL signal reads 0vdc with the LASER pushed and not pushed.
  4. The “IN” signal reads 0vdc when the LASER BUTTON is pushed.

B: With the plug unplugged from position #1 and power on:

  1. The laser will fire with the TEST button down on the supply if the “IN” pin is connected to 5V.

Are any of the statements A1-4 or B1 false?
Are there any other conditions that we should capture?


Hypothesis:
The “IN” signal coming from the controller is always held low (at ground) essentially disabling the laser from firing.

We can verify this by:

  • Leaving the connector that goes to the LPS plugged into position #1
  • Remove just the “IN” wire and jumper it to 5V.
  • Try the test button down on the LPS, if the hypothesis is correct the laser should fire

Hello Donkjr

We can verify this by:

.Leaving the connector that goes to the LPS plugged into position #1
.Remove just the “IN” wire and jumper it to 5V.
.Try the test button down on the LPS, if the hypothesis is correct the laser should fire

yes the laser is activated it shoots

Are any of the statements A1-4 or B1 false?

all true

I disassembled the controller I tested the components marked yellow in the photos and there seems to be a short circuit

if from the controller connector with the GND IN TL wires that from the LSP goes to the controller, I remove the IN wire and try the test button so LSP the laser works

How did you test for a short?
Why do you think you have a short?
Short to what …

I connect one part of the DVM (black) to the negative and with the other tip (red) I touch the components highlighted with the yellow dot and on both sides the DVM plays beeps
all the other components the same instead the DVM only plays on one side

in these marked there is continuity the others mark a value with the DVM