Futura MCR3, Operator'S Manual

Page: 19 / 26

17
Installation - Excavating
Out of Trench Set-Up - Bucket Levelled
Level the bucket and
position the machine
so a measurement can
safely be obtained on the
dipper arm.
Set the laser up and turn
it on.
Determine the distance
from the laser to the
bottom of the trench (L).
The length is the height of
the instrument (HI) plus
the depth of cut from the
benchmark to the bottom
of the trench (C).
Standard Plumb: Mount the mast on the side of the dipper arm so it points
to the
bucket pivot pin
as illustrated above.
Position the receiver so the set-up length L is the distance from the bucket
bottom to the offset on-grade symbol on the back of the receiver. (Set up to
the center on-grade symbol if center on-grade will be used).
Turn the receiver on and select standard plumb mode, offset on-grade, and the
desired deadband. (Select center on-grade if set to center symbol).
Begin to excavate. Take grade readings with the bucket levelled and the LED's
solid.
ACE mode: Follow the procedure above except the set-up length is the finished
elevation to the center on-grade symbol (L) minus the bucket height length
(B) . (Set-up length = L - B)
Enter the ACE mode. Press and hold the plumb switch to scroll up the set-up
length scale and release the switch when the lit LED is closest to the measured
set-up length. The LED will blink to confirm the setting.
Select the desired deadband and begin to excavate.
Take grade readings with the bucket levelled and LED's solid.