Hypertherm HTA Rev 6.00 Install Guide - Manual (Page 46)

34 Installation & Setup Guide
THC Speed Setups
(Shown only when enabled)
THC Acceleration Rate
This parameter allows the operator to set the acceleration rate for smooth and stable movement of
the Sensor™ Torch Height Control. The higher the acceleration rate, the quicker the THC will get up
to speed. The lower the acceleration rate, the smoother the machine will position the cutting device.
Values are entered in milligees.
Maximum THC Speed
Enter the maximum speed for the Sensor™ THC movement in inches per minute.
THC Jog Speed
Enter a value for the desired THC jog speed.
THC Home/Fast IHS Speed
The THC Home/Fast IHS Speed entered here is used to home the torch at the top of the slide and to
move the torch from the selected IHS height towards the plate, looking for the surface of the plate.
THC Slow IHS Speed
The THC IHS Speed is used to retract the torch after the plate has been sensed. The torch will retract
at this speed until the contact sense is lost. This determines the exact distance to the plate
regardless of any flexing of the plate. A very small speed is recommended for optimal accuracy.
Torch Height Disable Feature
The Torch Height Disable Feature is used to activate the Torch Height Disable output and “freeze” or
disable the automatic adjustment of the Automated Torch Height Control system and prevent diving
or crashing of the torch in corners. Note: The Dual Grid/THC feature must first be enabled in the
Plasma Setups screen.
This output is activated by the control based on the values of Plasma Hi/Lo % of Cut Speed, Plasma
Distance to Corner and Plasma Distance from Corner setup parameters. When any one of these
conditions is met, the Torch Height Disable feature will be implemented. The definition of a corner is
based on the tangent angle in the Special Password screen and the value of the Plasma Hi/Lo speed.
Tangent Angle
This parameter is used to set degree of the tangent angle for control motion. Segments within a part
that intersect at angles greater than the selected tangent angle will decel to zero or minimum corner
speed. Segments within a part that intersect at angles less than or equal to the selected tangent
angle will not decel, unless the next segment is a speed limited arc.
Plasma Hi/Lo Speed Percentage
The Hi/Lo Speed specifies the percentage of the entered Cut Speed below which the control will
activate the Torch Height Disable output. The plasma system may use this output to switch from low
to high current or to disable the height control.