ACU-RITE Micro-Line M - Manual (Page 11)

MICRO-LINE Reference Manual
SETUP
(
S - M
M
LEC =
)
x 1,000,000
S = Standard length
M = Measured length
• In the DRO mode.
• Place a standard of known length on the table. Make sure it’s parallel
with the table’s travel.
• Put the readout in the absolute display mode ( ABS/INCR key).
• Using an edge finder or dial indicator, locate one end of the standard.
• Press the ZERO key twice for the axis you are measuring. “0” should
appear on the display.
• Move the table along the axis until the edge finder or dial indicator
reaches the opposite end of the standard.
• Write down the length that is shown on the readout display for
that axis.
• Use the formula below to calculate the LEC for the axis you just
measured. Enter the result in the LEC screen (previous page).
Note: If the measured length is greater than the standard length the
LEC value will be negative.
How to Determine the Linear Error Compensation
Follow this procedure for each axis:
Formula
Example
If the length of the
standard you used is
10” and the measured
length along the X-
axis is 9.995”, then
the LEC for the X-
axis is 500 parts per
million (PPM).
(
10 - 9.995
9.995
LEC =
)
x 1,000,000
LEC =
500 PPM
(rounded to the nearest
whole number)
8
MLMmanual.QXD 2/12/02 5:01 PM Page 19