LINK Systems OmniLink II Press Automation Control - Manual (Page 119)

August 30, 2002 Manual Version 1.0 6.14
Section 6.5.3 In Position
In Position type channels are used to monitor whether material is fully fed into the die on each cycle of
the press. A sensor should be used to detect when the material to be fabricated is fully fed into the die.
Figure 6.9 illustrates an example of the use of a sensor used as an input to a channel programmed for In
Position type. In this example the material is fed forward contacting a spring loaded lever arm. A
sensor monitors the position of the lever arm. When the material is in the correct position, the sensor
turns on. If the feed is too short or too long, the sensor will be off.
When programming a channel for In Position type, the operator must enter crankshaft angles to mark On
and Off points for a timing 'window' during which the material will move into place. The Window On
angle must be set to a point before the material gets into position. The Window Off angle should be set
to a point after the material has been fed into place. If the material is not in position by the end of the
timing window, a fault will be generated. The Off angle must also be set so that the fault will stop the
press before the die closes enough to cause damage. An illustration of the In Position timing sequence is
shown in upper part of Figure 6.10. This figure shows that the material was fed into place during the
timing window and that the material was in place at the end of the timing window.
MATERIAL
SENSOR
A. BEFORE FEED PROGRESSION B. CORRECT FEED C. OVER FEED
Figure 6.9 In Position Input