Alarm 9 homing proble

leangela.jones · January 13, 2024, 9:36pm

Waiting for connection…

ok

[VER:1.1h.2022070601:]

[OPT:VZ,15,128]

Target buffer size found

ok

Homing

ALARM:9

Homing fail. Could not find limit switch within search distance. Defined as 1.5 * max_travel on search and 5 * pulloff on locate phases.

ok

Grbl 1.1h [‘$’ for help]

[MSG:‘$H’|‘$X’ to unlock]

[MSG:Caution: Unlocked]

ok

Grbl 1.1h [‘$’ for help]

[MSG:Local access point Engraver_62621 started, 192.168.4.1]

[MSG:HTTP Started]

[MSG:TELNET Started 8080]

[MSG:‘$H’|‘$X’ to unlock]

Grbl 1.1h [‘$’ for help]

[MSG:‘$H’|‘$X’ to unlock]

[MSG:Caution: Unlocked]

ok

[VER:1.1h.2022070601:]

[OPT:VZ,15,128]

Target buffer size found

ok

Moderation edit

ok

Grbl 1.1h [‘$’ for help]

[MSG:‘$H’|‘$X’ to unlock]

[MSG:Caution: Unlocked]

ok

$22=0

ok

Waiting for connection…

ok

[VER:1.1h.2022070601:]

[OPT:VZ,15,128]

Target buffer size found

ok

Homing

error:5

Homing cycle is not enabled in your Grbl settings.

error:5

Homing cycle is not enabled in your Grbl settings.

<Idle|MPos:-451.000,-451.000,0.000|FS:0,0|Pn:P|WCO:0.000,0.000,0.000>

ok

Moderation edit

gilaraujo · January 13, 2024, 9:57pm

ALARM:9
Homing fail. Could not find limit switch within search distance. Defined as 1.5 * max_travel on search and 5 * pulloff on locate phases.

error is slightly self splanatory

Did you check your switches and homing cycle?

JohnJohn · January 13, 2024, 9:57pm

The OPT is the Build options for your Laser Engraver.
V is for Variable Spindle (laser)
Z is For Homing - Force Origin Enabled

The Build Options are listed here:

github.com

gnea/grbl/blob/bfb67f0c7963fe3ce4aaf8a97f9009ea5a8db36e/doc/markdown/interface.md?plain=1#L109


      
          - **Push Messages:**
          	
          	- `< >` : Enclosed chevrons contains status report data.
          	- `Grbl X.Xx ['$' for help]` : Welcome message indicates initialization.
          	- `ALARM:x` : Indicates an alarm has been thrown. Grbl is now in an alarm state.	
          	- `$x=val` and `$Nx=line` indicate a settings printout from a `$` and `$N` user query, respectively.
          	- `[MSG:]` : Indicates a non-queried feedback message.
          	- `[GC:]` : Indicates a queried `$G` g-code state message.
          	- `[HLP:]` : Indicates the help message.
          	- `[G54:]`, `[G55:]`, `[G56:]`, `[G57:]`, `[G58:]`, `[G59:]`, `[G28:]`, `[G30:]`, `[G92:]`, `[TLO:]`, and `[PRB:]` messages indicate the parameter data printout from a `$#` user query.
          	- `[VER:]` : Indicates build info and string from a `$I` user query.
          	- `[echo:]` : Indicates an automated line echo from a pre-parsed string prior to g-code parsing. Enabled by config.h option.
          	- `>G54G20:ok` : The open chevron indicates startup line execution. The `:ok` suffix shows it executed correctly without adding an unmatched `ok` response on a new line.
          
          In addition, all `$x=val` settings, `error:`, and `ALARM:` messages no longer contain human-readable strings, but rather codes that are defined in other documents. The `$` help message is also reduced to just showing the available commands. Doing this saves incredible amounts of flash space. Otherwise, the new overrides features would not have fit.
          
          Other minor changes and bug fixes that may effect GUI parsing include:
          
          - Floating point values printed with zero precision do not show a decimal, or look like an integer. This includes spindle speed RPM and feed rate in mm mode.
          - `$G` reports fixed a long time bug with program modal state. It always showed `M0` program pause when running. Now during a normal program run, no program modal state is given until an `M0`, `M2`, or `M30` is active and then the appropriate state will be shown.

The laser engraver is supposed to find ‘home’ by homing when it’s first powered up.

It has settings to control homing behavior.

One of the settings is an internal command to travel 1.5 times farther than the allowed travel in all directions toward limit switches at home. This is to ensure that the engraver goes far enough.

This is what is meant by : “…search distance. Defined as 1.5 * max_travel on search”

When the engraver arrives at home, to ‘Locate’ Home properly the engraver touches the switch and pulls back. It attempts this 5 times. Most often one time is sufficient.

This is what is meant by : “5 * pulloff on locate phases”

The Engraver Needs to complete both steps to complete the homing Cycle.
The Alarm 9 means that didn’t complete the homing cycle.

This is what is meant by :
"Homing
ALARM:9
Homing fail. "

From your engraver output, I can not determine if the head of the engraver moved in the wrong direction, did not move enough, did not move at all or if, or moved correctly and the switches were not activated or were activated and not pull off.

Please describe the homing behavior of your laser engraver.

The homing behavior you observed before turning off ‘homing’.

If you’d like to proceed with turning off Auto Homing on startup as a diagnostic step, you can do so in LightBurn by selecting Edit in the top row, then Device Settings, then click the switch next to Auto-home on startup.

Be sure to click OK to accept the change.

The following seems unproblematic:

I will truncate the unneeded bulk from your first post and look forward to some description of the homing behavior you’re observing.

JohnJohn · January 13, 2024, 10:21pm

I rolled this back to your first version because you’re not wrong…
A description of the observed behavior is absolutely necessary to proceed with trobleshooting.

Wyked · January 14, 2024, 12:51am

I just had this problem after adding extension rails to mine, tested switch, worked fine, installed, Error 9, removed and tested, worked fine, found when I installed it the pins on the back of the board were making contact with the rail causing Fail, added small thin nylon washers to space it so no contact was made, Problem Resolved.

system · February 13, 2024, 12:51am

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.