When this error message appears, this is a problem with a limit switch which is not functioning,
or the power board do not receive the signal from limit switch.
When this problem appears after the switching ON machine, the Z (table) X (head) or Y (bridge)
move a few centimetres, and then this error message appears, on LCD display.
In fact, limit switch circuit is in normal using “open”, so when the machine is switching ON, there
is a rooting of tests during the firmware loading, and then if there is a signal from a limit switch in
“close” position, so the stepper motor turn in order to “open” the circuit. But after a few
centimetres if the limit switch circuit stays on close position, all movement of the machine stop ,
and then the “ERR end of travel” appears on display .
Check the limit switch in relation with the movement X Y or Z or Z auto. For the Zauto limit
switch, try to move up and down the shaft of the Z auto (just near the lens) in order to control
the free sliding, if the Z auto shaft is lock in the head, remove the shaft and clean it , put 1 drop
oil, and then put it back I the head, and then switch the machine OFF and ON to control the end
of travel state.
Regarding the other limit switch control the functioning with a multi-meter, and then check the
continuity between the limit switch contacts and the connector on power board (big black
connector with brown and black wires)