Y-axis orientation

After checking the UC CNC manual I came to the following procedure for:

1. Reversing the orientation of the Axis. (question above)
2. Redefining the coordinates (in order to align the directions in the CAM software and on the machine)
3. Moving to the Left-bottom location of the work space. Using this as the home position.

Solution in UC CNC

1. Flip the box behind the Dir. Pin. / port.

Dir port & pin: Which is the physical output pin on the motion controller device for the step signal. The signal can be configured active low or active high selecting or unselecting a checkbox next to the field. Changing the active polarity of the signal reverses the axis running direction.

2. Flip the box behind the Home pin. / port.

Home port & pin: Which is the physical input pin on the motion controller device for the Home of Reference point switch or sensor. The machine axis can be homed and pick up the reference point using this switch or sensor. The signal can be configured active low or active high polarity. The correct polarity depends on if the Home switch or sensor inputs a low (0V) or high (5V) signal when activated. The home direction to the positive or to the negative side of the axis can be configured with the "Direction positive" checkbox. The home pin may be the same pin as a limit pin, if using the same sensor for the home and limit functions. If the home and limit pins are the same then the pin will be treated as a limit pin all the time except when a homing sequence for that axis is in execution. In this case the lmit function is disabled and the pin is treated as if it was a home switch only. When the homing sequence is finished, the pin is again treated as a limit input pin.

3. Use Write offset on Homing to the coordinate that represents the location on the work area. For D3.840 this is:
   • X-axis: 594
   • Y-axis: -883
   • Z-Axis: 0

Write offset on Homing: Which is a numeric value and sets the coordinate to write to the axis position DRO when a homing action is executed and succeded. The parameter is defined in Units. The homing position DRO value can be autoset with checking the checkbox next to the field. If the autoset checkbox is not set then the axis will remain it's coordinate when a homing sequence is successfully executed. If the autoset checkbox is not set then the set value will be written to the axis position DRO when a homing sequence is successfully executed.

4. Use Back off to move the axis after the homing procedure. The location reached is registerd as the home position. For *3.840 the values are:
   • X-axis: -594
   • Y-axis: 0
   • Z-Axis: 0

Back off: Which is a numeric value and is a movement distance the machine axis will make after the homing off. If the parameter is set to 0 then no movement will happen after the homing. The movement can be to the negative or positive direction depending on the sign of the value. The final position after the back off movement is registered as the home position.

 I will try it.