OPERATION
CommandTHC for X-Y Table
Instruction Manual
4-9
5
Setup Screen A
A percent value used to calculate the pierce height.
During a normal cut cycle, the torch will move down and sense the workpiece,
then retract to the Pierce Height (Set Cut Height X Pierce Height Factor). At this
point the THC will issue a “Start” signal to the plasma system and wait for a
“Transfer” signal.
See
Determining Pierce Height Factor
later in this section.
Pierce Height Factor
Sets the lifter downward force during the IHS cycle. This value is a compromise
between IHS speed, accuracy and lifter load capacity. Normally this value is set to
the lowest force that will reliably move the lifter at the set IHS Speed. This setting
will result in the least plate deflection and the greatest IHS accuracy.
This limited-force-stall sensing is the backup mode to the ohmic contact plate
sensing. System will default to limited-force-stall sensing if the Nozzle Ohmic
Contact is set to OFF.
The use of Stall Force sensing is not as accurate as ohmic contact sensing.
To compensate for plate deflection, the user may need to increase the values for
Set Cut Height and/or Pierce Height Factor.
Setpoint range:
Relative value between
1 (minimum) and 10 (maximum)
Stall Force
Sets the lifter downward speed during the IHS cycle. This value is a compromise
between lifter speed and IHS accuracy.
Note: At lower speeds the IHS accuracy will be improved. At excessive speeds
the torch tip may be damaged and decrease IHS accuracy.
Setpoint range:
Relative value between
1 (minimum) and 10 (maximum)
IHS Speed
Range
50%–300%
1 – 10
1 – 10
ON – OFF
ON – OFF
0 – 9 sec
ON – OFF
1 – 10
inch or mm
0 – 1 sec
