Hypertherm THC ArcGlide - Manual (Page 123)

ArcGlide THC Instruction Manual 806450 123
2 – Installation
Slow: This speed is the Homing Speed and is the fastest speed for manual moves. It is also the maximum speed limit
during arc voltage control.
Setting: 3,810 mm/min (150 in/min)
IHS: This parameter sets the slow speed for the final approach to the workpiece during an IHS operation. It is also the
slow speed for manual moves. To avoid poor regulation of speed, do not set this value below 10% of
Maximum Speed.
Setting: 1,524 mm/min (60 in/min)
Mechanical
Encoder Counts: This value scales the position feedback from the encoder.
The value is based on the ball-screw pitch and the encoder resolution. It is equal to the number of encoder
counts per revolution, multiplied by the number of revolutions required to travel one inch. The encoder is
operated in 4X mode, so the number of counts per revolution is equal to the number of pulses per revolution
multiplied by four.
The Hypertherm 239 mm (9.40-inch) lifter has an encoder with 1,000 pulses per revolution which produces
4,000 counts per revolution in 4X mode. The lifter has a 5 mm pitch ball-screw which requires
25.4 (in/mm) / 5 (mm) = 5.08 revolutions to travel one linear inch. This results in a value of 5.08 (revolutions)
x 4,000 (counts/revolution) = 20,320 counts per linear inch of travel.
Setting: 800 counts/mm (20,320 counts/inch)
Slide Length: This value is the length of the lifter's usable travel. The ArcGlide lifter has 239 mm (9.40 inches) of usable
travel.
Current Limit: This is the maximum continuous motor current for which the lifter motor is rated.
This value is the normal, continuous operating current limit but motor current can periodically exceed this
value for a few seconds during extreme acceleration. The ArcGlide lifter uses a motor with a 3 A continuous
current limit.
The motor can be damaged if the value for this parameter is set above the continuous current operating limit
for the installed motor.
Range: 1 A to 6 A; Setting: 3 A
Stall Force: This value determines the amount of force for the Stall Force backup to the ohmic contact sensing. The
values are relative values and start at 1 for the minimum force and 10 for the maximum force. This value
should be set high enough to avoid false stall detection but not so high that the excess force causes a
deflection of the workpiece and inaccurate IHS operation.
With the Hypertherm 239 mm (9.40-inch) lifter, the value of 5 is appropriate. It may be necessary to reduce
this value if the THC is used with a thin workpiece. Use the Test IHS function to optimize this value.
Test this feature by disabling the ohmic contact by using the process menu or by removing the ohmic
contact wire. The Stall Force value is optimum when there are no false workpiece detections and the IHS
operation is accurate.
Range: 1 to 10; Setting: 5