Hypertherm V9 Series Phoenix Rev.11 - Manual (Page 120)

120 Phoenix 9.76.0 Installation and Setup Manual 806410
3 – Torch Height Control Axis Setup
Speeds
Maximum: Sets the maximum linear speed that the THC can achieve. This value depends on the lifter motor speed at 45
VDC, the screw pitch, the weight of the lifter load, and the desired speed of operation.
This value is used as the 100% speed value when scaling the control equations. It is important that this value
is set correctly because it affects the scaling of all the other control loops.
Set this parameter during installation, before optimizing Speed Gain.
Set this value to a speed that can be achieved easily. Use a conservative setting and assume a low, incoming
AC line voltage. If this speed is set too high, the maximum available motor drive voltage will be insufficient to
drive the motor to the desired maximum speed. This will make the top of the linear control range unavailable
and result in sub-optimal operation.
If the Maximum Speed is set too high, it may be difficult for the THC to operate precisely at slow speeds
when trying to control the arc voltage or to move to an accurate IHS distance. If this speed is set too low, the
linear control range will only cover the low portion of the available mechanics range and the result may not be
optimal.
For the Hypertherm 239 mm (9.40 inch) lifter, this value is 600 in/min (15240 mm/min). At the low input line
voltage limit, the motor drive is capable of supplying about 45 VDC. The motor used in the Hypertherm 239
mm (9.40 inch) lifter will produce full-rated torque at about 3,300 RPM at this voltage. The Hypertherm 239
mm (9.40 inch)
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 3,300 (RPM) / 5.08 (revolutions/inch) = 650 linear in/min
of travel speed. This value was rounded down to the nearest even hundreds to guarantee a 100% value
under all conditions.
ArcGlide: 15,240 mm/min (600 in/min)
Fast: This speed governs all automatic rapid moves such as the End-of-Cut-Retract or the Initial Approach to the
workpiece.
Set this parameter to the value of Maximum Speed. However, you can set it lower if there is a heavy load on
the lifter. With the Hypertherm 239 mm (9.40 inch) lifter, this value is set to 600 in/min (15,240 mm/min).
ArcGlide: 15,240 mm/min (600 in/min)
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.
ArcGlide: 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.
ArcGlide: 1,524 mm/min (60 in/min)