SECTION 2 —INTRODUCTION
SSC-500 Hydraulic Press Solid-State Control
Rockford Systems, LLC
Call: 1-800-922-7533
13
(Continued on next page.)
Overview of Sequence of Operation
(continued)
AUTOMATIC
To initiate this mode of operation, set the Control Selector to “Automatic” and set the Actuating Means Selector to the “Hand” position. In this mode
of operation, press the “Automatic Prior-Action” push button and then both run buttons concurrently (within five seconds). This causes the ram to
stroke continuously from the “TOS” limit switch to the “BOS” limit switch, and back to “TOS.” The ram may be stopped and returned to the “TOS”
limit switch by pressing the return/inch-up yellow palm button. The automatic mode of operation requires either a light curtain or the safeguard
interlock connection to function (see page 11).
LIGHT CURTAIN
The light curtain is active during the downstroke portion of the machine cycle in all modes of operation except inch. The light curtain is muted
during the ram-return portion of the cycle. The light curtain is muted when the ram reaches the “BOS” limit switch. If a mute point is required prior
to bottom of stroke, a light curtain mute limit switch may be used. This input should be set to come on when the upper die is at 1/4” above the
piecepart and must remain on until the “BOS” limit switch is reached. (See the schematic diagram supplied with the control for the mute switch
connection.) The LIGHT CURTAIN OFF/ON selector is provided so the light curtain can be turned off when another method of safeguarding is used.
LIGHT CURTAIN ACTIVE ON THE UPSTROKE (OPTIONAL)
This option allows the light curtain to be active on the upstroke portion of the machine cycle as well as the downstroke (no muting). This option is
enabled at the factory.
PRESSURE OR DISTANCE RETURN
A key-selector switch is provided for the selecting the method of returning the ram by
PRESSURE, PRESSURE/DISTANCE
, or
DISTANCE
. An
optional pressure switch can be connected to the return selector switch to facilitate pressure, pressure/distance, or distance return on machines
with “BOS” limit and pressure switches. The “BOS” limit switch input can be either N.O. or N.C. as required. (See the OPTIONS EDIT programming
on page 33.)
Optional Software and Overview
An options module is required with any of these software options:
• PSDI (Presence Sensing Device Initiation)
• User Inputs
• Speed Change
• Auto Single
• Block Valve Monitoring
PSDI (PRESENCE SENSING DEVICE INITIATION)—REQUIRES OPTIONS MODULE AND LIGHT CURTAIN
PSDI is an optional mode of operation for hydraulic presses. In this mode of operation, a stroke is initiated by an interruption in the sensing of a
light curtain when the light curtain is used as the point-of-operation safeguard. The operator can hand feed parts through the light curtain sensing
field, and when the hand(s) is removed from the sensing field, the press will single stroke. This interruption and withdrawal sequence is commonly
referred to as a “break.”
To initiate the PSDI mode of operation, set the control selector switch to “Single,” turn the light curtain “On,” and set the PSDI selector switch to
PSDI 1 (single break) or PSDI 2 (double break for loading and unloading of pieceparts). At this point, interruption of the light curtain sensing field
should not cause the press to stroke. First press the “PSDI Prior Action” push button, then begin PSDI. The press should start and run in the PSDI
mode until a stop signal is given or if time expires between breaks. The PSDI prior action push button must then be reinitiated to restart the PSDI
mode of operation. See the PSDI Section on page 34 for the sequence of operation and displayed messages.
PSDI TIMER—REQUIRES OPTIONS MODULE
The PSDI timer measures the time between breaks. The timer starts timing once the stroke is complete and the slide is at TOS limit switch. If time
expires before the next break occurs, the PSDI mode of operation will deactivate. To reactivate the PSDI mode of operation, depress the PSDI prior
action push button. The PSDI timer can be programmed from 2 to 30 seconds. See the PSDI TIMER programming section on page 30.
