LINK Systems System 1100 Tonnage Monitor - Manual (Page 52)

APPLICATIONS INFORMATION
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4-2
Figure 12. "C" Frame Machine.
The preferred mounting locations are near the middle of the front
of the "C" frame. The forces that occur at the front of the
machine frame are tensile forces. The compression forces that
occur at the "acceptable" locations at the rear of the "C" frame
can be accompanied by nonlinear buckling (bending) on thin web
sideframes of some machines.
Do not mount strain links near the curves at the front of the "C"
frame. The curvature of the frame produces nonlinear strain
signals. Also, on presses with increased cross sections near the
front of the frame, avoid mounting sensors next to the change of
cross section to avoid nonlinear strain signals. The center
portion of the front face of the "C" frame is an excellent sensing
location, but sensors are highly susceptible to damage from die
setting operations.
4.2.2 Straight Side Machines
Straight side presses and other machines of four "corner post" or
modified four "corner post" construction are best monitored by four
strain links that input to a four channel System 1100 Tonnage
Monitor. On machines with tie rod through hollow upright (column)
construction, strain links may be mounted on either the tie rods
or the uprights, although ease of installation usually dictates