Denford Software & Machines

Our Microrouter Pro won't home, all of a sudden. When home is pressed the head 'steps' very slowly in the oposite direction down the X axis. If I overide home using the 'secret' button I can jog the head 3/4 up the X axis where it stops. I can also jog the machine head down the X axis right up and I presume beyond the glass. It's as though the machining envelope has moved 250mm down the machine. Any suggestions?

It sounds like the X homing switch has failed or stuck.
Thats why it creeps away when you home - it already thinks it has hit the home switch, and is backing off it.

The machine envelope is set by the position of the homing switch. If you use the secret home button, then this by-passes the home sequence.
Wherever the X axis happened to be when you turned on, would become the home position - when using the secret button.

Take a look at the switch - it may have got dust stuck inside it so the contacts can't move.