Hypertherm V9 Series Phoenix Rev.11 - Manual (Page 67)

Phoenix 9.76.0 Installation and Setup Manual 806410 67
2 – Machine Setup
CBH Axis
The following setup screen is available if the cutting system has for a contour bevel head.
Proportional Gain: Proportional Gain correlates to elastic stiffness in the control loop. Increasing the proportional gain
increases the static stiffness, but decreases response of the servo loop.
Under proportional loop control, the drive system will apply a restoring torque to the motor in proportion to
the position error of the axis.
With a Proportional Gain too high, the system will be unstable which will result in overshoots and a generally
“nervous” and shaky axis. This is also referred to as a “hot” control loop.
With a proportional gain too low, the system will respond in a loose or sloppy manner. This can be seen in
the test pattern when the outside corners become rounded and the circle segments do not all meet in the
center.
Integral Gain: Integral Gain improves the positioning accuracy of the control loop.
Integral Gain can be used to compensate for static friction or gravity. Excessive Integral Gain can result in
system instability.
For most shape cutting machines, this parameter should be set to zero (0).
Derivative Gain: Derivative Gain helps to dampen sudden changes in velocity. The higher the Derivative Gain, the
slower the response time to the control loop.