Does the motor strain when the lever reaches its end stop, and how is mechanical life protected?
The first step of HCT402 calibration is the motor automatically learning its working range: the two end points of the lever are established and the motor applies no command beyond those limits. This keeps the lever from pressing continuously against its mechanical stop. The HC402 servo motor applies approximately 20 kgf to the lever and the HC400 15 kgf; these values are enough to move the lever, not to strain the mechanics.
Manual hydraulic levers have mechanical stroke limits. A motor applying continuous force beyond that limit wears both the lever bearing and the motor.
On the HCT402 this is solved by the first step of the three-stage calibration: the motor drives the lever end to end once and learns the working range. After that, even if the joystick is held fully at its end, the command saturates at the learned limit.
- The HC400 servo motor applies 15 kgf of force and 0-75 kgf·cm of radial torque to the lever.
- The HC402 servo motor applies approximately 20 kgf to the lever; it is positioned for heavy duty use and stiffer levers.
- Position control is PID based and works with ±1 degree accuracy; once on target, the motor does not keep pressing.
Two points matter in practice. First, calibration must be performed after installation; otherwise the system cannot know the real end points. Second, the mounting clamp must seat fully on the lever. A loose clamp causes the motor to slip and the learned range to drift. If the lever stiffens or the stroke changes, repeat the calibration.
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