Wintriss wpc 2000, User Manual

Page: 152 / 250

WPC 2000 User Manual 1128500
Operation 4-3
Responding to an Interrupted Stroke
An Interrupted Stroke is a condition that occurs whenever the press is stopped before a stroke
can be completed, forcing the operator to return the press to its Top-stop position. The
command that stops the press may be issued by the operator or a safety device or be the result
of a fault condition. When an Interrupted Stroke occurs, the Interrupted Stroke LED on the
WPC 2000 display flashes (see Figure 1-1, page 1-2 for location), and WPC 2000
automatically switches to Two-hand Maintained Single-stroke mode. To clear the Interrupted
Stroke, press both Run/Inch palm buttons on the Operator Station until the press returns to top
dead center. When the press has returned to Top-stop, the Interrupted Stroke LED turns off,
and WPC 2000 switches back to the stroke and mode selected when the Emergency-stop
occurred.
When the Emergency-stop is caused by a system fault, you must first clear the error by
pressing the Reset/Select button on the WPC 2000; then you can return the press to top dead
center.
If the press is being operated in Inch mode when the Emergency-stop occurs, WPC 2000 stays
in Inch mode, allowing the operator to return the press to Top-stop by simultaneously pressing
and holding the Run/Inch palm buttons just as he does in Two-hand Maintained Single-stroke
mode.
Responding to a Brake Warning
The amber-colored Brake Warning LED on the WPC 2000 display (see Figure 1-1, page 1-2
for location) illuminates whenever the Stopping Time of the press, which is recorded by the
Brake Monitor on every Top-stop, increases to within 10 milliseconds of the Stop-time Limit
set in Initialization (see Setting the Stop-time Limit, page 3-16). The brake warning alerts you
to the need for maintenance on or repair of the brake (see Brake Warning LED, page 5-3).
WPC 2000 compares the Stopping Time of the press with the Stop-time Limit each time the
press top-stops.
Whenever the Stopping Time of the press becomes longer than the Stop-time Limit, the
out-of-limit value flashes in the LED display, and WPC 2000 prevents the press from being
run until the problem has been completely corrected (see Stop Time Exceeded, page 5-4).
INTERRUPTED STROKE DUE TO MACHINE MALFUNCTION
Investigate and correct the cause of the Interrupted Stroke before resuming operation of the press.
Failure to comply with these instructions will result in death or serious injury.
DANGER
!