Can't Correct Home Position

I have been using a rotary tool and now I think I may have messed up. I turned rotary off in Lightburn and reconnected the wiring, but when I home the laser and use Get Position, it returns X: - 622.50 Y: -622.50. Any time I try to move the laser to a specific position, it just slams the stops. Can’t figure out how to get it back to 0,0. I have cycled power and use G92 X0 Y0, but nothing works. Please help.

Did you always use this command prior to use of rotary?

Can you confirm this is for your Creality CR-Laser Falcon?

Can you document the steps that you took to use the rotary to begin with?

Finally, run these commands in Console after homing and return output please:

$I
$$
$#
?

Thank you for responding. I am using the CR-Laser Falcon 10W. I only used the G92 command during troubleshooting. I have the Atomstack R3 and have used the Falcon with and without the R3 successfully as of yesterday. To use the R3, I unplug the cable to the Y axis stepper and plugged in the R3. As of this moment, I have done the following:

  1. Manually home the Falcon.

  2. Turn on the Falcon.

  3. Start Lightburn (auto-homing disabled).

  4. Get Position returns 0,0 for X and Y.

  5. Click Home in Lightburn. The following errors are returned:
    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.

  6. Enter the requested commands and received this output:
    $I
    ok
    $$
    $0=10
    $1=250
    $2=0
    $3=4
    $4=0
    $5=0
    $6=0
    $10=1
    $11=0.010
    $12=0.002
    $13=0
    $20=0
    $21=0
    $22=1
    $23=3
    $24=1500.000
    $25=4500.000
    $26=20
    $27=3.000
    $30=1000.000
    $31=0.000
    $32=1
    $100=80.000
    $101=80.000
    $110=10000.000
    $111=10000.000
    $120=500.000
    $121=500.000
    $130=400.000
    $131=415.000
    ok
    $#
    [G54:0.000,0.000,0.000]
    [G55:0.000,0.000,0.000]
    [G56:0.000,0.000,0.000]
    [G57:0.000,0.000,0.000]
    [G58:0.000,0.000,0.000]
    [G59:0.000,0.000,0.000]
    [G28:0.000,0.000,0.000]
    [G30:0.000,0.000,0.000]
    [G92:0.000,0.000,0.000]
    [TLO:0.000]
    [PRB:0.000,0.000,0.000:0]
    ok
    ?
    <Idle|MPos:3.000,3.000,0.000|FS:0,0|Pn:X>
    ok

  7. I can set laser position in Lightburn and the Y axis moves and the X axis does not.

  8. Click Home and received the same two errors.

  9. Get position reports -622.50 for both X and Y axis.

PS: after the homing failed, I re-ran the requested commands and this is the output:
$I
ok
$$
$0=10
$1=250
$2=0
$3=4
$4=0
$5=0
$6=0
$10=1
$11=0.010
$12=0.002
$13=0
$20=0
$21=0
$22=1
$23=3
$24=1500.000
$25=4500.000
$26=20
$27=3.000
$30=1000.000
$31=0.000
$32=1
$100=80.000
$101=80.000
$110=10000.000
$111=10000.000
$120=500.000
$121=500.000
$130=400.000
$131=415.000
ok
$#
[G54:0.000,0.000,0.000]
[G55:0.000,0.000,0.000]
[G56:0.000,0.000,0.000]
[G57:0.000,0.000,0.000]
[G58:0.000,0.000,0.000]
[G59:0.000,0.000,0.000]
[G28:0.000,0.000,0.000]
[G30:0.000,0.000,0.000]
[G92:0.000,0.000,0.000]
[TLO:0.000]
[PRB:0.000,0.000,0.000:0]
ok
?
<Idle|MPos:-622.500,-622.500,0.000|FS:0,0|Pn:Y|Ov:100,100,100|A:S>
ok

Can you confirm that your machine has homing switches? And if so, does your machine auto-home at power-on?

What is the normal startup procedure?

When you attempt to home, do you see the laser attempt to home? And if so, is it moving toward the correct homing corner? Can you describe in as much detail as possible what happens at this point, especially things that aren’t normal.

A couple of things I’m noticing in the status lines you’ve capture for both before and after homing fail.

Pn:X indicates that your X limit switch is being engaged. Was that the case while this was happening?

Pn:Y indicates that your Y limit switch was being activated. Same question.

Not sure how the machine is arriving specifically at the -622.500 values but I wonder if it defaults to some max value when homing does not complete.

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