100-412-234 REV. 06 187
7.2.5 Mechanical Stop
The Mechanical Stop affects the amount of downward travel the Actuator is allowed to
have, up to the full stroke length of the unit. The multi-turn knurled knob to the right of
the Stack, on the bottom of the Actuator, is the Mechanical Stop adjustment. The
Mechanical Stop has an indicator on the right side of the Actuator, showing a scale of an
arbitrary unit of measure.
The Mechanical Stop is designed to stop the Horn from contacting your Fixture in the
event your part is missing. It is not a precision measuring device, and it is usually not
recommended that this be used as a ‘collapse’ or other distance weld limiting device. The
“missing part” function can also be used to control critical horn to fixture distances.
Initially, set the mechanical stop to allow at least 1/4 inch of Horn travel, but any distance
up to the full stroke length is suitable.
To adjust the Mechanical Stop:
7.2.6 Emergency Stop
The Emergency Stop is a user control that will prevent the actuator and power supply
from running, and will also immediately terminate a weld cycle and cause the Horn to
retract. It does not remove power from the system. The front panel display of the power
supply will indicate that the system is in emergency stop mode when it is. Twist the
emergency stop button to reset the system.
Table 7.1 Mechanical Stop
Step Action
1
Activate the manual dump valve and manually lower the carriage until the
horn is just above the fixture.
2
If the horn does not reach the fixture and has not traveled 4 inches (100
mm), loosen the lock ring fully and turn the mechanical stop-adjusting
knob clockwise until the carriage reaches the desired position.
If the horn reaches the desired position before contacting the stop, turn the
adjusting knob counter-clockwise until the stop contacts the carriage.
3
Check the height of the horn and make any necessary adjustments to the
stop.
4
When you have reached the setting you want, tighten the lock ring. The
lock ring will prevent the mechanical stop adjustment from vibrating loose
during operation.
5 Place a part in the fixture, reset the air pressure, and perform a test weld.
6
Check that full force develops between the horn and the part. If not,
readjust the mechanical stop.
NOTICE
Due to Dynamic Follow Through, do not weld in the last 1/4" of
stroke.
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