1125100 WPC 1000 User Manual
3-18 Initialization, Setup, and Checkout
Determining the 90° Stop Time
The 90° stop-time test is required to set the proper safety distance for personnel guarding
devices including light curtains, Two-hand controls, and type-B movable barriers. The test is
performed at the press’s most critical stopping point– 90°– and provides the Ts + Tc value in
the ANSI safety distance formula. If possible, run this test in Continuous mode (see next
section). If your press does not have a Continuous setting, perform the test in Single-stroke as
instructed in Performing the 90° Stop Test (Single-stroke Mode), page 3-19.
Performing the 90° Stop Test (Continuous Mode)
1. Install the heaviest upper die in your press. Adjust the counterbalance for ram weight, if
your press has a counterbalance.
2. Set the Stroke Select switch to “CONT,” and start the press.
3. Press the Reset/Select button repeatedly until the “90° Stop Test” indicator becomes lit
(see Figure 3-8).
4. Turn the WPC Settings key switch to “+” to arm the test. The “90° Stop Test” indicator
flashes to alert you that the test has been armed. The press will stop the next time the
crankshaft angle reaches 90°.
INCORRECT SAFETY DISTANCE DUE TO INCORRECT STOP TIME
• Perform a 90° Stop Test any time you change the Stop-time Limit of WPC 1000.
• Recalculate the safety distance based on the new Stop-time Limit and adjust or reinstall
safeguarding devices according to the new safety distance (see Calculating the Safety
Distance, page 3-20).
Failure to comply with these instructions will result in death or serious injury.
Figure 3-8. WPC 1000 Displays Showing Results of 90° Stop-time Test
With 90° Stop Test segment
selected, turn WPC Settings
key switch to + to arm the
test. Segment flashes when
test is armed. Results
appear in LED display
when test is complete.
BRAKE WARNING
INTERRUPTED STROKE
TOP STOP ANGLE
AUTO CARRYUP
STOP TIME LIMIT
MICRO-INCH
STOPPING TIME
STOPPING ANGLE
90
° STOP TEST
COUNTER
COUNTER PRESET
ANGLE / SPM
INTERRUPTED STROKE
BRAKE WARNING
TOP STOP ANGLE
AUTO CARRYUP
ANGLE / SPM
90° STOP TEST
STOP TIME LIMIT
MICRO-INCH
STOPPING TIME
STOPPING ANGLE
WPC 1000 Standard Display WPC 1000 Optional Counter Display
CAM 2
off
on
CAM 1
on
off
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