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4.6 MACHINE STROKE INSPECTION & ADJUSTMENT
The stroke setting is important for the proper operation of the machine. If this setting has changed, the
machine may over-travel and cause the cylinder to "bottom out". This continued condition will
eventually cause the starter overload to open. It can also cause the hydraulic oil to overheat and damage
hydraulic system components. A slight change in the stroke setting can result in inadequate stroke to
operate the tooling. A check of the machine’s stroke setting is made at the punch station. SEE FIGURE 5
ON THE FOLLOWING PAGE. Set the stroke control handles (A) out to their farthest position away
from the metering boss (C). Turn the selector switch (G) to the START position and power the machine.
Place the selector switch in the PUNCH position. Measure the distance from the punch ram to the top of
the bolster. The distance should be 8-13/16 inches (224mm). Switch the selector switch to the SHEAR
position and measure the distance. The distance should be 6-13/16 inches (173mm). If the stroke is out of
these limits, use the following procedure.
1. Loosen the two mounting plate screws (D) that hold the mounting plate to the machine.
SEE FIGURE 5 ON THE FOLLOWING PAGE.
2. Move the plate vertically, up or down. Moving the plate up will bring the distance up and a
movement down will bring the distance down. Moving the plate 1/8 of an inch (3mm) will move
the dimension approximately 1/8 of an inch (3mm).
3. Tighten the screws and re-check the dimensions. Repeat, if needed.
A. STROKE CONTROL HANDLES
B. SCALE - STROKE CONTROL
C. METERING BOSS
D. MOUNTING PLATE SCREWS
E. JOG CONTROL
F. JOG/RUN/PROBE SWITCH
G. PUNCH/START/SHEAR SWITCH
H EMERGENCY STOP SWITCH
I START BUTTON
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