Creality Falcon Laser not homing

[laseryu]

Can you help? I bought a 660*500 frame and connected my cr laser falcon. But now it doesn’t go home. It only makes a small jerk of a couple of millimeters and stops.
And i got this:
[0;31mE (337255) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed, call gpio_install_isr_service() firste[0m
[0;31mE (337257) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed, call gpio_install_isr_service() firste[0m
ALARM:8
Homing fail. Cycle failed to clear limit switch when pulling off. Try increasing pull-off setting or check wiring.
ALARM:3
Reset while in motion. Grbl cannot guarantee position. Lost steps are likely. Re-homing is highly recommended.
ok
[0;31mE (338548) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed, call gpio_install_isr_service() firste[0m
[0;31mE (338549) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed, call gpio_install_isr_service() firste[0m
[0;31mE (338550) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed, call gpio_install_isr_service() firste[0m
[0;31mE (338551) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed, call gpio_install_isr_service() firste[0m
spindle_pwm_off_value:0.000000 spindle_pwm_min_value:0.000000 spindle_pwm_max_value:1023.000000
Grbl 1.3a [‘$’ for help]
[MSG:‘$H’|‘$X’ to unlock]
[MSG:Caution: Unlocked]

[MikeyH (Mike Hembrey)]

@laseryu

Homing fail. Cycle failed to clear limit switch when pulling off.

This is saying it thinks it is already sitting on a switch. So it moves a little bit to move off the switch, expecting it to open. That is the little jerk.

Recheck all the wiring and connections related to the limit switches. They should be wired NO (normally open), not NC (normally closed).

[laseryu]

I’ve checked many times already. I even inverted them, I also tried turning them off altogether. It didn’t help.

[JohnJohn (John Johnson)]

Please test the status of the limit switches in the controller by entering a question mark in the Console window and pressing return.

?
(then press return or enter)

With regular GRBL we expect to get a line like the following:

@Blaschi

<Idle|MPos:3.000,3.000,0.000|Bf:35,7679|FS:0,0|Pn:PXY|CL:0,100|PS:2,1|ER:0,0>

Please perform this test and report back. The Pn:PXY show here that both limit switches are triggered as far as the controller is concerned.

If you’re inclined to perform the next tests, repeat the question mark test while holding one of the Limit Switches and report that result here… then repeat this a third time while holding the other limit switch.

Please copy and paste the results into a reply here for confirmation.

Looking forward to seeing the results.

For a more thorough walk-through you’re welcome to review the following.

Ortur Laser Master 2 Pro Homing fail

Hello to all! After spending a few hours on troubleshooting i still have the problem that my machine does no homing if i want to do that in Lightburn or without a PC. The problem came up after i canceled a laserjob. After that it was impossible to home the laser. When i click the “Home” Button, the X and Y axis makes a step of 3mm in + direction and than it stops. If i click on “Go to origin” it moves to the wrong direction (right behind) although it should move to the front left. I never cha…

[laseryu]

@JohnJohn

Please test the status of the limit switches in the controller by entering a question mark in the Console window and pressing return.

<Idle|MPos:6.000,6.000,0.000|FS:0,0|Pn:XY|WCO:2.000,2.000,0.000>

[laseryu]

@JohnJohn

Looking forward to seeing the results.

<Idle|MPos:6.000,6.000,0.000|FS:0,0|Pn:X|Ov:100,100,100|A:S> - Y
<Idle|MPos:6.000,6.000,0.000|FS:0,0|Pn:Y> - X

ok

[MikeyH (Mike Hembrey)]

@laseryu

tried turning them off altogether

Without details on what you mean by this, I can only recommend you contact the manufacturer.

We often say we “checked everything”. The correct statement is, “I checked everything I can think of.” However, if it is still not diagnosed, there must be something left.

You have 2 choices. Either accept there is nothing else left to check, or be the eyes, ears, and nose for the person helping you. They cannot be at your machine, so it is critical you provide information and follow instructions to help gather more information.

This may sound like a rant to you, but it is not. It is how most software and machine problems get solved. Many forum members want to feel good about helping you, but we need YOUR help to help you.

Soooo… tell me what you checked and how. Limit and no-limit operation is different.
Did you tell the controller that limit switches were not installed? If so, how?

[laseryu]

@MikeyH

This may sound like a rant to you, but it is not. It is how most software and machine problems get solved. Many forum members want to feel good about helping you, but we need YOUR help to help you.

First of all, I want to say that I really appreciate your opinion and rely on Yours help as on Jesus Christ. So let’s start. I bought a 660*485 frame. In order to increase the working field for my CR Falcon. The frame came with a 12V control board. And the laser module is 24V. So I bought new motors and connected the control board of my CR Falcon, which is also powered by 24V. And from the very beginning, having connected it to Lifhtburn, I was faced with the fact that it does not go home.

@MikeyH

Soooo… tell me what you checked and how. Limit and no-limit operation is different.
Did you tell the controller that limit switches were not installed? If so, how?

So I started checking the wires. First I disconnected the motors from the board, leaving only the terminals. The result was the same. Then I removed the motors and checked them on my ender. This is the 42-34 motor. They worked perfectly. Then I connected the old motors that came with the frame (with 12V power) and the result did not change - the car did not drive home.

With all this, if you put the head close to the end caps and increase the pull-offset, the head moves but hits the end caps hard. Also, the movements work correctly over the entire area of ​​the frame (660*485). But I can only go back through “go to origin”. Because when I press “home” the head jerks by the pull-off value (2mm for example) and stops, throwing alarm 8 and alarm 3.

Next I started checking the limit switches. First I disconnected them from the board and checked with a multitester to make sure they were in NO mode. And so they were. They worked properly. However, if I disconnected the limit switches and started homing, the situation did not change - a small jerk and a stop.
In the LaserGRBL program, it homes, but this homing occurs not by limit switches but by “go to origin”. It’s like I’ve written everything down. I can also shoot a video and post it on YouTube.

[JohnJohn (John Johnson)]

@laseryu

@JohnJohn

Please test the status of the limit switches in the controller by entering a question mark in the Console window and pressing return.

<Idle|MPos:6.000,6.000,0.000|FS:0,0|Pn:XY|WCO:2.000,2.000,0.000>

Above, both switches are active or triggered.

@laseryu

@JohnJohn

Looking forward to seeing the results.

<Idle|MPos:6.000,6.000,0.000|FS:0,0|Pn:X|Ov:100,100,100|A:S> - Y
<Idle|MPos:6.000,6.000,0.000|FS:0,0|Pn:Y> - X

ok

When you depress the Y-Axis switch, the active Y-Axis switch status disappears.

When you depress the X-Axis switch, the active X-Axis switch status disappears.

This is good news because 3 out of 4 of the wire connections for each switch are correct.

The switches are wired to either +V or 0V. This is fine.
The Logic input pin for the switch on the controller is correct.
No changes to the controller side of the connections is required.

One wire on the switch is Common (or Com) and Either Normally Open (NO) or Normally Closed (NC)

Move only the one wire on the switch, from the NO position to the NC position or from the NC position to the NO position. The wire to Common appears to be installed correctly.

Repeat the test after swapping only the one wire on each switch.

[laseryu]

@JohnJohn

When you depress the Y-Axis switch, the active Y-Axis switch status disappears.

When you depress the X-Axis switch, the active X-Axis switch status disappears.

This is good news because 3 out of 4 of the wire connections for each switch are correct.

The switches are wired to either +V or 0V. This is fine.
The Logic input pin for the switch on the controller is correct.
No changes to the controller side of the connections is required.

One wire on the switch is Common (or Com) and Either Normally Open (NO) or Normally Closed (NC)

Move only the one wire on the switch, from the NO position to the NC position or from the NC position to the NO position. The wire to Common appears to be installed correctly.

Repeat the test after swapping only the one wire on each switch.

I soldered one wire on the terminals as you said. And the head went the other way. I changed the direction in the $23 command and OH, MIRACLE!!! EVERYTHING WORKS! Thank you great CNC gurus for your help! Special thanks to YOU, John Johnson Johnsonovich!!! Hallelujah! I didn’t believe this could happen! Thank you very much!!!