Rack Angle; Stroke Cycle Key Switch - Baileigh Industrial SH-120250-HD Operator's Manual

Rack Angle

Push the SB7 (+) button and the valve YA3 is energized. When the other hydraulic and
mechanical functions are met, the rack angle will increase until it contacts the limit switch SQD.
Push the SB6 (-) button and the relay KA2, KT3 and valve YA1, 2, and 3 are energized. When
the other hydraulic and mechanical functions are met, the rack angle will increase until it
contacts the limit switch SQC.
The LED display lights HL11-HL16 will illuminate in turn as the rack angle changes from 0.5°-
3.0°.

Stroke Cycle Key Switch

Pedal Hold Cycle:
With the pedal hold cycle, the operator must
hold the pedal for the beam to continue to go down. If
the operator releases the foot pedal the beam will return
to the TDP.
With the pump running place the stroke cycle key
switch SA1 in the left position. If not at full up (TDP) the
beam will move to the top dead point and stop. At the
TDP the limit switch SQA will close, the relay KA6 is
energized to energize the KA1 relay which in turn will
hold itself energized.
Then step on the footswitch S1, the relay KA3, timer
relays KT3, and KT4 and valve YA2 are energized and
the beam comes down.
When the footswitch is released or when the time set on the KT4 expires, the relay KA3, timer
relay KT4 and valve YA2 are de-energized. The relay KA4 and valve YA2 are energized and the
beam returns to the TDP.
Full Single Cycle:
During full single cycle operation, the operator may press and release the foot pedal. The
beam will travel down until the timer KT4 expires or until it reaches the lower limit switch SQC
and then return to the TDP.
Place the stroke cycle key switch SA1 in the right position. Press (and release if wanted) the
footswitch S1, the beam will move down. The KA3 relay is energized and holds itself. When time
on the time delay relay KT4 expires or the beam reaches the limit switch SQC is close, the relay
KA4 and valve YA2 are energized and the beam returns to the TDP.
The length of stroke time (aka time delay timer KT4) is controlled by the potentiometer RP1
located on the control panel.
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