LINK Systems 5100-8 Tonnage & Analog Signal Monitor - Manual (Page 58)

Doc #: L-802-1110 Page 56 Rev. 02
The best strain gage locations are
below gibs and at least 12 inches
above where the upright joins the
machine bed. Locating the strain gage
in the gib region can cause excessive
bending moments to be translated
through the gibs into the upright as the
slide tries to "cock" for some
conditions of off-center loading.
Locations too near the bottom of the
upright may produce a non-uniform
strain field. Do not mount strain gages
on any side of an upright that has a tie
rod access opening. When holes are
present in the desired upright
mounting location, avoid mounting
strain gages any closer than three
diameters of the hole directly above or
below the hole or any closer than one
diameter of the hole to the side of the
hole. Don't mount strain gages in
recessed panel areas in uprights.
Shaded Areas
Are Best Mounting
Locations
Shaded Areas
Are Best Mounting
Locations
Figure 29: Straight Side Machine Gage Locations
A.
OK
OK
UPRIGHT
BOTTOM
Bottom
Of Gib
12”
Hole
C.
B.
ENTIRE
SIDE BAD
Access
Hole
D.
Recessed
Panel
A.
OK
OK
UPRIGHT
BOTTOM
Bottom
Of Gib
12”
A.
OK
OK
UPRIGHT
BOTTOM
Bottom
Of Gib
12”
OK
OK
UPRIGHT
BOTTOM
Bottom
Of Gib
12”
Hole
C.
Hole Hole
C.
B.
ENTIRE
SIDE BAD
Access
Hole
B.
ENTIRE
SIDE BAD
Access
Hole
ENTIRE
SIDE BAD
Access
Hole
D.
Recessed
Panel
D.
Recessed
Panel
Recessed
Panel
Stay away from corners of uprights as strain gage
mounting locations. The best locations on the upright for
strain gages on machines of tie rod construction are
generally on the centerline of the tie rod. Avoid any
mounting locations where uprights have internal
reinforcements or other change of section. As far as
possible, strain gages should be mounted in conditions of
geometric symmetry on uprights and at the same vertical
height on each upright. Figure 29 illustrates mounting
locations for straight side machines of tie rod
construction.
Figure 30 shows areas to avoid on the uprights of straight
side machines of tie rod construction. The cross-hatched
areas should be avoided.
Figure 30: Upright Areas to Avoid