1128500 WPC 2000 User Manual
3-28 Initialization, Setup, and Checkout
When switch 3 is set to ON, the Foot Switch is in Foot Control mode, which requires that the
operator depress and hold down the Foot Switch through the Auto Carry-up Angle in order to
complete a stroke. If the Foot Switch is released before the Auto Carry-up Angle, WPC 2000
issues an Emergency-stop command to the press.
Switch 4 – Enabling Auto Compensated Top Stop (ACTS)
When you have Auto Compensated Top Stop (ACTS) firmware, switch 4 controls enabling of
the ACTS feature (see Table 3-7). ACTS is a WPC 2000 option that adjusts the Top-stop
“On” Angle to an earlier point in the stroke to compensate for increases in press speed.
ACTS is designed specifically for variable-speed presses. As the speed of the press increases,
the stopping angle increases, pushing the point at which the press actually top-stops past 360°,
or TDC. ACTS senses when the press has not stopped at TDC and compensates for this
lengthening of the stopping angle by moving the Top-stop angle back an equivalent number of
degrees. The Top-stop angle cannot be adjusted backward beyond 211°, the factory setting.
Adjustment of the Top-stop angle always lags behind press speed changes because ACTS
requires several Top-stops to fine tune its settings.
If you use the ACTS feature, it is critical that you set the Stop-time Limit on your brake
monitor correctly so that you have advance warning of the need for brake maintenance. Since
increases in stopping angle may be due to brake wear rather than to speed changes, ACTS
may increase the difficulty of detecting brake problems unless back-up systems are in place.
When switch 4 is set to OFF, ACTS is disabled and the press operates normally. When switch
4 is set to ON, the ACTS feature is enabled, allowing the Top-stop angle to be adjusted as
press speed increases.
Table 3-6. Switch 3 Settings (S101): Enabling Foot Control
Setting Foot Switch Functionality
OFF Normal operation–Foot Trip (Default). When operator
depresses Foot Switch, press strokes.
ON Enables Foot Control. Operator must depress and
hold down Foot Switch until the press has passed the
Auto Carry-up Angle in order to execute a stroke.
Table 3-7. Switch 4 Settings (S101): Enabling ACTS
Setting ACTS Functionality
OFF Normal operation (Default). ACTS disabled.
ON ACTS enabled. Top-stop angle is retarded as speed
of the press increases.
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