Hypertherm PHC Sensor - Manual (Page 42)

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Sensor™ PHC Operation and Setup Guide
SW9 SW10 End of Cut Retract Time
on
on Retract = Low = 0.25 Sec @ Max Speed (0.8” std lifter)
on off Retract = Med Low = 0.5 Sec @ Max Speed (1.6” std lifter)*
off on Retract = Med High = 1.0 Sec @ Max Speed (3.3” std lifter)
off off Retract = High = 1.5 Sec @ Max Speed (5.0” std lifter)
SW9 and SW10 control the end of cut retract. This setting should be set as low as possible to achieve
optimum cycle times and still clear worst case tip-ups. The end of cut retract moves at the maximum lifter
speed.
SW11 Automatic
Kerf Detect
on Normal – PHC the detects Kerf crossings and auto HOLD
off Automatic Kerf Detection is disabled*
For the automatic kerf detection to operate properly, the kerf threshold pot must be adjusted to the correct
level. The correct level is low enough to trip the kerf detection when crossing a kerf, but high enough that
nuisance trips are avoided during normal cutting. This pot should be adjusted by viewing the yellow “corner /
kerf hold LED” during a test cut.
SW12 Preflow
During IHS
on Plasma Start and Preflow during IHS with capable plasma systems
off Normal – Plasma Start and Preflow after IHS – Contact Start Torch *
Note:
This function must be disabled for Powermax ® contact start torches.
This function is only used with high frequency start mechanized torches. With mechanized torches, this
function can save cycle time by performing IHS and torch preflow during the same period of time. When
“Preflow During IHS” is active, the “Start” and “Ignition Hold” output signals are applied to the plasma system
during the IHS process. This allows the plasma system to begin the gas preflow requirement during the same
period of time when the PHC lifter is positioning the torch at the correct pierce height. After the PHC lifter has
been positioned at the correct pierce height, the Ignition Hold output is removed to allow the torch to start and
the cutting process to begin.
SW13 Reserved
on
Normal
off Special operation
SW14
Lifter Limit Switches
on (Sw NC) Open on Limit – Use normally closed lifter inputs
off (Sw NO) Close on Limit – or switches not used, lifter hard stops *
For the standard lifter, limit switches are not used. The PHC senses the lifter upper and lower limits by sensing
when the lifter hard stops at the travel limits.