Questions about dual X axis and Z2 end stop

raymond

If we got dual X axis,I think we should get two end stops for X axises , each for one axis,but I only found one,so how should we set up the end stop pin for both X axises？ And about the Z2 end stop,which looks pretty good,but since only one Z axis,ever though you can mirror it for both or three steppers,Z2 end stop seems useless,when the Z end stop is triggered ,all Z steppers will stop,so what's the Z2 end stop for?

Repetier

Dual x axis uses x min endstop for first extruder and x max endstop for second extruder.
Extruder x offset is the distance to x=0 so e0 has it positive to come out of it's box and E1 negative to go to same position.

In V1 you can use 2 z endstops to adjust on homing. Use Z2_MINMAX_PIN for second endstop. In firmware V2 we will get a different approach making it easier.

raymond

Did you mean even it says Mirror motor signals to other stepper driver,but in fact it's independent Z axis but not a mirror?

Repetier

Yes, during homing the second endstop needs to be triggered as a special case as well, while in normal operation only first endstop is tested. Means if normal z motor is then triggered that motor stopps but second motor continues to run until that switch is also triggered and only then the move stopps.