Safer, More Productive
and Easier to Use
The following
descriptive writing is the base design criteria for the Pressroom Electronics'
punch press control system. The inherent design features are superb
for enhancing production and safety. Please note that options are available
within each individual system or package to aid in production.
Design
Criteria
Complete self-checking dual logic microprocessor based punch
press controls with two independent running control channels and a comparison
circuit. The comparison circuit assures that both channels agree as
the punch press control sequence occurs. The preprogrammed dedicated
inelastic control system prevents in field alterations to the safety
features of the control. The control incorporates a control reliable
redundant design concept to assure a higher level of safety and reliability.
Control
Reliability "Control Component Failure"
The Pressroom Electronics' Punch Press Control meets or exceeds
all OSHA 1910.217 and ANSI B11.1-2001 standards for control reliability.
Control reliability standards require that clutch/ brake circuits be
designed and constructed so that a single failure or fault within the
system does not prevent the normal stopping action from being applied
to the press when required, or does not create an unintended stroking
action, but does prevent initiation of a successive stroke until the
failure is corrected.
Redundant
Design Concept
The Punch Press Control system utilizes the redundant design
concept. This gives the clutch/brake control system a higher level of
redundancy and control reliability.
Diagnostic
Message Display
Standard on the solid state Pressroom Electronics Punch Press
Control System is the "Diagnostic Message Display" Mounted
with the operator controls at customer designated location on the control
panel, the alpha-numeric message display informs the user of any faults,
failures and the current operating status of the punch press control
system. The messages are in plain English and will give the press operator
and front line supervisor information quickly and safely. The "Diagnostic
Display" system is so advanced that it will immediately inform
the user of such problems as pressure switch faults, failed output relays,
or rotary cam mis-adjustment. The system will also pinpoint internal
printed circuit board faults for immediate replacement. This self-diagnostic
feature will save maintenance dollars and will enhance machine uptime
measurably due to the units captive troubleshooting ability. Best of
all, this information is supplied without even opening the control panel
door. Additionally, a complete series of LED's (light emitting diodes)
are mounted on the clutch/brake module for visual status of all inputs
and outputs related to the machine cycle status.
System
Logic and Component Diagnostics
A combination of LED's and alpha-numeric plain English message
display will enhance in-field troubleshooting greatly. The advanced
design can even troubleshoot itself and advise the user if a printed
circuit board is defective and if it needs to be replaced or repaired.
Diagnostics are for both the control system logic and for punch press
component monitoring. Twenty-nine different messages can appear on the
message display.
Redundant
Captive Contact Safety Relays
Redundant relays assure safety if an output relay should
fail. The system utilizes safety relays which have force-guided contacts.
This is a configuration where the contacts are mechanically locked together
so that if one set of contacts weld, the other contacts cannot change
state. If one should fail, the message display will identify which relay
has faulted and what state the relay should be in (on/off).
Pressroom
Electronics Solid State Punch Press Controls
Incorporates "cross checking, self-checking and redundancy"
to assure an ultrasafe design.
Interrupted
Stroke Provisions with Indicator
If the punch press is in the "single stroke" or
"continuous" mode and the press stops before the completion
of a full stroke, the Interrupted Stroke Provision is activated. The
control will automatically switch to the "inch" mode and the
palm buttons must be used to return the ram to the top of the stroke.
When back at the top, the control automatically switches back to the
original operational mode setting and the operator may resume normal
production. The Interrupted Stroke Provision improves productivity and
safety significantly by eliminating the need for the operator to make
mode selection adjustments on interrupted strokes.
Micro-Inch
(optional)
Controlled by keyed selector switch on/off on the control
panel, Micro-inch provides ram movement for a predetermined amount of
time. Micro-inch is actuated by the palm buttons and the amount of ram
movement is controlled by a Micro-Inch timer inside the control panel.
Micro-Inch also indexes the ram in increments that eases set-up in high
speed or short stroke press operations.
Automatic
External Trip (optional)
Controlled by a keyed selector switch on/off on the control
panel. This option enables a punch press/press brake to be cycled by
a signal from a robot or feeding device one stroke at a time.
Continuous
on Demand [Pause] (optional)
Controlled by keyed selector switch on/off on the control panel. Designed
per ANSI Standard B11.1-2001 Section 6.11.4.3.6. Click
here for a detailed description of this optional feature.
