Cincinnati 175 CB - Optional Controls

To operate the press brake with the bed and ram parallel,
the graduated collar and pointer should be set to their
"ZERO" marks. Servicing and adjusting the tilt control is
covered in the MAINTENANCE section of this manual.
FIGURE 13
...----------CAUTION---------..
WHEN OPERATING AT THE EXTREME LIMITS
OF STROKE, THE FULL LENGTH OF STROKE
SHOULD· BE REDUCED BY THE AMOUNT ,OF
THE RAM TIL T FOR OPERATION IN A TILTED
POSITION TO PREVENT LEFT PISTON FROM
STRIKING THE TOP OR BOTTOM OF THE
CYLINDER.
The maximum allowable tilt is 112
ft
in the length between
the tape anchor points. If this tilt is exceeded, the
out-of-Ievel limit switches will stop the ram by
de-energizing the main pump motor.
SET-UP LIGHTS (FIGURE 5)
This light'is mounted on front side of the main electrical
enclosure. The green Ught comes on whenever the ram is
at the bottom reversal position.
OPTIONAL CONTROLS
UP STROKE - STROKE STOP Switch (FIGURE 14)
This is a two position ("ON"-"OFF
n
)
key selector
supervisory control located on the main console. When in
the nON" position the ram will automatically stop immediately
after passing through the bottom reversal point. All
operator controls being used must be released and
reactivated to restart the return stroke of the ram. This
con trol can be used in all modes.
TONNAGE CONTROL
The tonnage control consists of an adjustable selector
mounted on the main console. The maximum tonnage for
"centered
tf
loads is limited by the setting of this selector.
Upon building up to· the pre-selected tonnage, the ram will
automatically reverse from a downward to an upward
direction.
12
Actual forming tonnage in high speed is approximately 45%
of the tonnage control setting.
FIGURE 14
IMPORTANT ---------..
The hydraulic components and machine frame
members are safeguarded against overload by
both a pressure transducer and a relief valve in
the circuit. However, care must be taken to
provide enough area under upper and lower dies
to prevent them from sinking into the bed top or
ram nose due to highly concentrated loads. ThiS
is the shaded area shown in Figure 15. The
minimum area (sq. in.) for each die to prevent
sinking may be calculated by this formula:
MAXIMUM TONNAGE
Die Area = 15
An example for a 135 ton machine: the minimum
die area is 135 divided by 15, or 9 square inches ..
ADDITIONAL FOOTSWITCHES AND/OR PALMBUTTONS
The operation of these controls is the same as the standard
controls. Additional selector switches are provided for
selecting left, right or both controls.
MULTIPLE DEPTH STOPS (FIGURE 16)
With this option a total of four distinct pre-set bottom
reversal points are available. The No. 1 stop is the
standard bottom stop. Stops No.2, 3 and 4 are set by
adjusting micrometer barrels which are added to the bottom
s top cam on the right hand side of the machine. T,he press
brake operator can select which of the four stops he wants
by a portable s~lector switch, which can be moved any
place along the front of the press brake.