ACU-RITE MILLPWR G2, Technical Manual

Page: 309 / 546

5.12 Reference Marks 309
5.12.2 Traversing the Reference Marks
The reference marks must be traversed after any interruption in power. Spec-
ify which axes are homed, and in which sequence, in
MP_refAllAxes or
MP_refAxis.
 Press the machine START hard key: The reference marks are automatically
traversed (MP_refAllAxes=True).
or:
 Press the machine axis-direction hard key: The user determines the
sequence of the axes (MP_refAllAxes=False).
After the reference marks have been traversed:

The software limit switches are activated.

The most recently set datum or workpiece datum and the machine datum
are reproduced.
Distance between
the scale reference
point and the
machine datum For position encoders with distance-coded reference marks, the machine
datum is defined with respect to the scale reference point, which is the first
reference mark after the beginning of the measuring length. On angle encod-
ers, the scale reference point is marked:
 In MP_refPosition, enter the distance between the scale reference point
and the machine datum.
For position encoders without distance-coded reference marks but with more
than one reference mark, every reference mark to be traversed must be eval-
uated.
 For each reference mark to be traversed, create another parameter block,
and enter in MP_refPosition the distance between the scale reference point
and the reference mark.
 Activate the parameter block that corresponds to the traversed reference
mark.