Joystick Response Curve
This is the curve that defines the relationship between joystick angle and the command produced. On a linear curve every degree produces an equal command; on a progressive (parabolic) curve the region near the centre is softened and the response speeds up towards the ends. The HCT402 uses this second approach: millimetric precision in the middle region, fast response at the extremes.
The choice of curve creates a very different feel of use with the same hardware. A linear curve is predictable but forces a compromise between precise work and fast work: if you lower the gain for precision, fast lifting slows down; if you raise it for speed, millimetric adjustment becomes impossible.
- Low slope in the centre region: small changes in finger pressure produce small movements, making it easier to seat the implement in place.
- High slope at the extremes: when the lever is pushed towards its end the movement speeds up noticeably, saving time in headland manoeuvres.
This behaviour is not a menu setting but the built-in characteristic of the remote control; the only thing the operator has to learn is how far to push the lever. On the HCT402 there is also a Soft and Dynamic mode choice in addition to the curve; the curve sets the size of the command, while the mode sets how smoothly the movement is applied. When the two are combined, both precise and fast-transition operations can be done with the same remote control.
The context in which this term is used: Converting a tractor hydraulic lever to electronic control