ACU-RITE DRO 200E - Manual (Page 23)

SETUP
DRO 200E
19
Linear Error Compensation
This readout includes a linear error compensation (LEC) feature that enables you to
compensate for machine tool inaccuracies by using a simple measuring standard.
You can have up to three different compensation segments per axis. For linear error
compensation to be effective, the error must repeat. If the error is different each
time it is measured, check and adjust the machine ways and lead screws. Also check
scale mounting bracketry.
If only one segment per axis is
being used, the correction factor
will be applied along the entire
length of the scale.
To use two or three segments you
must first find home using the
Power On Position Recovery (page
4). The segments must be
sequenced in order from negative
to positive without overlapping.
Segment centers will be located
midway between the two ends of
the standard. Segment boundaries
will be located midway between
the segment centers.
The standard must be parallel
with the axis of travel. Use an
indicator to insure this. If you
approach the ends of the standard
from opposite sides, you must add
the indicator tip diameter to the
length of the standard.
Order segments from Negative to Positive
DISTANCE
BETWEEN
CENTERS
MIDPOINT
BETWEEN
CENTERS
FIRST
SEGMENT
BOUNDARIES
THIRD
SEGMENT
BOUNDARIES
SECOND
SEGMENT
BOUNDARIES
MIDPOINT
BETWEEN
CENTERS
3 SEGMENT
LEC
ONE SEGMENT
COVERS THE
ENTIRE TRAVEL
1 SEGMENT
LEC
DISTANCE
BETWEEN
CENTERS
MIDPOINT
BETWEEN
CENTERS
FIRST
SEGMENT
BOUNDARIES
SECOND
SEGMENT
BOUNDARIES
2 SEGMENT
LEC
Order segments from Negative to Positive
When the LEC parameter is reached a message will prompt you to “ENTER NUMBER
OF ERROR COMPENSATION INTERVALS (0-3)”, then “X-INT” and the number of
intervals previ-ously selected will be displayed.
• Using the keypad, press 1
,
2
, or
3 to select the number of LEC segments.
Press 0 if no LEC is indicated for this axis.
• Press X to begin the first interval.
To automatically calculate the LEC, press the Y key.
A message will prompt you to “MOVE TO FIRST SIDE OF GAUGE – PRESS ENTER”.