USER MANUAL
Control State
In this state, the plasma system is OFF, the motor is holding position.
The system waits for the Cycle Start (“M3”) signal and enters either
the IHS Fast Approach state or the IHS Slow Approach state,
depending on whether the workpiece position is known.
The lifter moves the torch up at the programmed IHS Speed till the
Upper Limit Switch.
The THC enters this state when the actual position is the programmed
Slide Length. The motor is stopped and the torch maintains its
position. Only up motion is allowed during this state.
The torch moves down at the programmed Automatic Speed to the
Start IHS Height then enters the IHS Slow Approach state.
The lifter continues to move down at IHS Speed, using Ohmic or float
head sensor, until the lifter receives the Tip Sense input signal. When
the THC receives the Tip Sense input signal, it enters the Workpiece
Contact state.
The torch lifter begins to move up slowly until Ohmic sense or float
head contact is clear. The lifter then records the workpiece position
and enters the IHS Retract state.
The lifter moves up at the programmed Automatic Speed to the
Transfer
Height.
The lifter holds the torch at the IHS Transfer position, waits for the
Transfer input signal from the plasma system, and then enters the
programmed Pierce Start state.
The lifter moves the torch to Pierce Height. When the torch is in
position, the lifter enters the Piercing state.
The lifter holds the torch at the Pierce Height for the Pierce Delay
interval. When Pierce Delay is complete, the lifter enters the Puddle
Jump state if it enabled or Cut Prepare State.
The lifter moves the torch to the Puddle Jump Height. It waits for
Puddle Jump Delay, and then enters the Cut Prepare state
The lifter moves the torch to the Cut Height and sends the UCCNC
Motion signal to begin X/Y cutting motion. The THC waits for the AVC
Delay and then enters either the Sample state or the Cutting state,
depending on the operating mode
The controller receives a new Arc Voltage sample for this cut. It
modifies the operating Arc Voltage Control set point and enters the
Cutting state.
If AVC ON Mode is active and the Hold signal from the UCCNC CNC is
not active, the lifter controls the torch height using arc voltage
feedback.
If AVC OFF Mode is active operator can adjust the torch height by
rotating the encoder on the operator panel.
If Ohmic contact sense is enabled, the torch retracts if it makes Ohmic
contact. When the cut is complete and the Cycle Start input signal
from
the CNC is deactivated, the THC enters the retract state.
The lifter initially jogs up 0.25 mm. After 0.5 second, it
begins continuous upward motion at the IHS Speed. After 2 seconds,
the lifter increases the speed to the programmed Manual Speed.
Outputs do not change, if the torch is already cutting, it continues to
cut.
The lifter initially jogs down 0.25 mm. After 0.5 second, it
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