Homing Error Alarm 9

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.
Longer Ray5 10W

Also recieved this error Alarm 3
ALARM:3

Reset while in motion. Grbl cannot guarantee position. Lost steps are likely. Re-homing is highly recommended.

Is this a new problem or a new laser? Has it ever worked properly?

New laser, Has only worked on sample file once

Ok. Does it have limit switches?

I don’t know how to determine that.

Limit switches would be located on one end of the X gantry and in one corner on the Y axis. They look like this typically.


I don’t think the Ray 5 comes with limit switches, but they are available as an add on.

If you don’t have limit switches you need to turn off Auto home on startup. That should solve your error 9.

Also, you must manually home the machine every time you turn it on, so that the controller knows where the laser head is on the platform:

That will eliminate all the future “smashing into the sides” problems other folks struggle with. :grin:

This solved my issue, thank you very much.