Hypertherm V9 Series Phoenix Rev.11 - Manual (Page 82)

82 Phoenix 9.76.0 Installation and Setup Manual 806410
2 – Machine Setup
THC Slow IHS Speed: Specifies the speed used to retract the torch after it senses the workpiece. The torch retracts at
this speed until contact sense is lost. This determines the exact distance to the workpiece regardless of any
flexing of the workpiece. A very low speed is recommended for optimal accuracy.
Tilt/Rotator Speeds
The following Speeds setup parameters are available when Tilt Rotator has been enabled.
Rotate Acceleration Rate: Specifies the acceleration rate for smooth and stable movement of the contour bevel head.
The higher the acceleration rate, the quicker the Rotate Axis reaches cutting speed. The lower the
acceleration rate, the smoother the machine will position the cutting device. Values are entered in
revolutions/second
2 .
Maximum Rotate Speed: Specifies the maximum speed for the Rotate Axis rotation in revolutions/minute.
Rotate High Jog Speed: Specifies the high speed for the rotate axis when it jogs.
Rotate Low Jog Speed: Specifies the low speed for the rotate axis when it jogs.
Tilt Acceleration Rate: Specifies the acceleration rate for smooth and stable movement of the contour bevel head. The
higher the acceleration rate, the quicker the tilt axis reaches cutting speed. The lower the acceleration rate,
the smoother the machine positions the cutting device. Values are entered in revolutions/second
2 .
Maximum Tilt Speed: Specifies the maximum speed for the tilt axis, in revolutions/minute.
Tilt High Jog Speed: Specifies the high speed for tilt axis when it jogs.
Tilt Low Jog Speed: Specifies the low speed for tilt axis when it jogs.
S-curve acceleration
S-curve motion is a feature of Hypertherm CNCs that allows smoother motion during acceleration than traditional, or
trapezoidal, motion.
During trapezoidal motion, the CNC sends a command to the drive systems to accelerate immediately to the desired
machine acceleration, as determined in the machine setups. This is the fastest way of reaching the maximum acceleration
rate and achieving the desired cut speed. However, this rapid change in acceleration produces “jerk” in the motion of the
table that can affect cut quality. Jerk is always greatest when the table is beginning to accelerate or decelerate at the
beginning or end of a cut.
During S-curve motion, the CNC sends acceleration commands to the drive system in increments until the system
reaches the maximum acceleration rate. The S-curve commands smooth out acceleration and reduce jerk for a given
acceleration rate. This may allow the table to reach higher acceleration rates if jerk was the limiting factor when using
trapezoidal motion.