ACU-RITE MILLPWR Old Style - Manual (Page 21)

DRO
MILLPWR
Page 2-2
Operation Manual
Finding Home
The ACU-RITE’s ENC150 precision glass scales included with your MILLPWR
system are different from standard ENC150 glass scales because they have only
one reference mark. The reference mark will be located between five and eight
inches from the centerline of your scale. The reference mark will most likely be
found in the positive count direction for both the X and Y axes; however, it may be
found in the negative count direction depending upon how the scale(s) are mounted.
MILLPWR must find these reference marks after power-up in order to establish the
farthest table travel, so you won’t crash the table. You must find home before you
can run a program.
To find home, press the DATUM softkey, then the FIND HOME softkey. The
table will move, one axis at a time, to find the reference positions.
If the table moves until it hits the hard stops and the servo motor stops, it
means the table was already positioned past the home position. Use the
handcranks to move the table away from the end and press
FIND HOME
again. Should the FIND HOME softkey be pressed immediately after home has
been found, the table will move to the hard stops and the servo motors will
disengage.
After home has been found, the DRO display will change. The absolute display
shows the tool position from the most recent datum.
Once you are
familiar with where
the reference marks
are, you can use the
“MOVE TABLE”
function to get close
to them before you
press "FIND HOME".
DATUM is a term
for “workpiece
zero” or “absolute
zero”.