ACU-RITE DRO 200E - Manual (Page 16)

READOUT OPERATIONS
DRO 200E
12
Setting Absolute Zero (Datum) Using a Preset
Presetting absolute zero (datum) allows the operator to
establish absolute zero at a point other than the current
position. To preset absolute zero:
1. Verify the readout is in ABS mode. If not press
A
.
2. Position the ram to a known location.
3. Press the z key next to the Z key once.
4. Enter the distance to the desired zero location.
Example:
The desired absolute zero (datum) is at the top of the work-
piece. The electrode is known to be 2.5 inches long and is
too fragile to be used to set zero.
1. Verify the readout is in ABS mode. If not press
A
.
2. Position the electrode clamp at the top of the work-
piece.
3. Press the z key next to the Z key once. The
display will show; “ _ _ _ _ _ _ _ 0”.
4. Press ± ± 2
,
.
,
5 and then the E key. The dis-
play will show “-2.5000” in the Z-axis.
With the electrode installed, the Z-axis absolute zero is
now set at the top of the workpiece.
Work Piece
2.500
electrode
length
ABS Display shows
0.0000 in Z-Axis
With Electrode
Setting Absolute Zero (Datum) at Current Position
1. In either DRO or EDM view, verify the readout is in
ABS mode. If not press
A
.
2. Position the ram to the point where 1st
spark will occur.
3. Press the z key next to the Z key twice.
Work Piece
Electrode
Clamp
ABS Display shows
-2.5000 in Z-Axis
Without Electrode
Work Piece
Spark
Gap
Position Ram
Here, then set
Z-zero
(Datum)
Preset at -2.5 inches