Hypertherm THC ArcGlide - Manual (Page 151)

ArcGlide THC Instruction Manual 806450 151
3 – Operation
UPPER LIMIT – The THC enters this state when it senses the upper limit switch. The servo motor is
stopped and the torch maintains its position and the THC resets its actual position to 0 (Home). Only down
motion is allowed during this state. An error message displays if the THC enters this state during automatic
operation.
IHS FAST APPROACH – The torch moves down at the programmed Fast Speed to the Start IHS Height
then enters the IHS Slow Approach state.
IHS SLOW APPROACH – The lifter continues to move down at IHS Speed, using Stall Limit, until the lifter
receives the Tip Sense input signal or stalls. When the THC receives the Tip Sense input signal or detects a
stall, it enters the Workpiece Contact state.
WORKPIECE CONTACT – The torch lifter begins to move up slowly until ohmic sense contact is broken.
The lifter then sends the workpiece position to the control module and enters the IHS Retract state.
IHS RETRACT – The lifter moves up at the programmed Fast Speed to the Transfer Height and then enters
the IHS Complete state.
IHS COMPLETE – The lifter holds the IHS Transfer position and sends the IHS Complete output signal to
the CNC. If necessary, the THC waits for the IHS Sync input signal from the CNC to synchronize multiple
torches. Then the THC enters the Start Plasma state.
START PLASMA – The lifter holds the torch at the IHS Transfer position, waits for the Motion input signal
from the plasma system, and then enters the programmed Pierce Start state.
PIERCE START – The lifter moves the torch to Pierce Height. When the torch is in position, the lifter enters
the Piercing state.
PIERCING – The lifter holds the torch at the Pierce Height for the Pierce Delay (Pierce Time in Phoenix
software) interval. When Pierce Delay is complete, the lifter enters the Puddle Jump state.
PUDDLE JUMP – The lifter moves the torch to the Puddle Jump Height. It waits for Cut Height Delay, and
then enters the Cut Height Accel state.
CUT HT ACCEL – The lifter moves the torch to the Cut Height and sends the Machine Motion output signal
to the CNC to begin X/Y cutting motion. The THC waits for the AVC Delay and then enters either the
V Sample state or the Cutting state, depending on the operating mode.
SAMPLE – The lifter receives a new Arc Voltage sample for this cut. It modifies the operating Arc Voltage
Control setpoint and enters the Cutting state.
CUTTING – If Auto Mode is active and the Corner Hold input signal from the CNC is not active, the lifter
controls the torch height using arc voltage feedback. If ohmic contact sense is selected, 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 Ramp Down state.
RAMP DOWN – The lifter holds the torch position and deactivates the Plasma Start output signal to shut
down the plasma system. The lifter waits for the plasma system to ramp down (when it loses the Motion input
signal from the plasma system). When the rampdown is complete, the lifter enters the End Cut Retract state.
MANUAL UP – The lifter initially jogs up 0.254 mm (0.01 inch). After 0.5 second, it begins continuous
upward motion at the IHS Speed. After 2 seconds, the lifter increases the speed to the programmed Slow
Speed. Outputs do not change; if the torch is already cutting, it continues to cut.