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SSC-1500 Part Revolution Solid-State Control
SECTION 2—INTRODUCTION
Overview of Motion and Settings
The redundant inputs are used by both processors to control the operation of the press. When the actuating means is depressed, and the primary
safeguard interlock conditions are met, the processors turn on their appropriate relays (SSR1 and SSR2). The dual solenoid valve is energized
sending air to the clutch and brake. The crankshaft is engaged to the flywheel drive and the brake is released allowing the ram to move. Within
the motion reference time window, the microprocessors must see a voltage signal from the DC tachometer in the resolver/pulser assembly that
represents motion or a motion fault is generated. If the actuating means is released prior to the auto up (holding) angle, the press ram movement
will stop. The stroke can be finished by depressing the actuating means again.
For brake monitoring, the control starts a timer when the relays and solenoids are deenergized. This timer stops when the motion from the
tachometer in the resolver/pulser has stopped. The stop-time value is then compared to the brake stop-time setpoint. If the stop time exceeds this
setting, a brake fault message is displayed. The reason for the increased stop time should be investigated and corrected before operating the press
again. (See pages 46 - 48 for programming the brake monitor.)
Sequence of Operation
This sequence of operation applies to all standard modes provided with the SSC-1500 Press Control.
OFF
The press is inoperable in this mode of operation. The
OFF
position cannot be used solely as the lockout/tagout means. To use any of the following
modes of operation, turn the mode selector switch from
OFF
to the appropriate position.
TWO-HAND INCH
To use
Inch
, the mode selector switch must be set to
INCH
, and the actuating means selector switch must be set to
HAND
.
Two-Hand Inch
is a mode of operation in which the ram travels as long as the operator(s) maintains actuation of the palm buttons. Each time the
buttons are released, the ram will stop. If the palm buttons are held depressed, the maximum amount of crankshaft travel the control will allow is
approximately 220°.
If
Timed Inch
is turned on, the clutch will engage and the ram will move only for a set amount of time programmed in to the control, even if the
palm buttons are held depressed. See pages 56 - 57 of this installation manual for
Timed Inch
programming information.
The
Inch
mode of operation is used for die setup, tool setup, and maintenance only. It is not intended for use
during production operations.
TWO-HAND SINGLE STROKE
To use
Two-Hand Single Stroke
, the mode selector switch must be set to
SINGLE
, and the actuating means selector switch must be set to
HAND
.
Two-Hand Single Stroke
is a mode of operation in which the ram makes one complete stroke or cycle upon actuation of the palm buttons. The palm
buttons must be held depressed during the die-closing portion of the stroke. Once the ram passes this part of the stroke, the palm buttons can be
released and the ram will automatically return to the top. If the palm buttons are released during the die-closing portion of the stroke, the ram will
stop and the buttons must be released and then reactuated to finish the stroke.
(Continued on next page.)
