Template:A-Series/Manual Control

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Manual Control

The A-Series range of motion control products are integrated with a depressible knob with 20 detents per revolution, allowing devices to be controlled without the use of a computer. There are two manual movement modes available, Velocity and Displacement: switch between these modes by holding down the knob for 1 second or via configuring the knob.mode (T:109) setting.

Upon power-up, the device will only travel towards the motor from its start-up position until the home position is reached. Once the device has been manually homed, the full range of travel becomes available.

Velocity Mode

Turn the knob clockwise to move the device in the positive direction (extend) or counter-clockwise for negative direction (retract). Each detent of the knob increases the speed of the carriage.

There are 16 speeds in each direction. The velocity profile and maximum speed can be configured via the knob.speedprofile (T:112) and knob.maxspeed (T:111) settings. The device stops and resets the knob upon arriving at the end of travel.

Displacement Mode

Turn the knob clockwise to move the device in the positive direction (extend), counter-clockwise for negative direction (retract). Each detent of the knob moves the device a fixed number of microsteps, specified by the knob.distance (T:110) setting. The device moves at the speed specified by the maxspeed (T:42) setting, or the slower of speed and limit.approach.maxspeed (T:41) if the device has not been homed. If there are fewer than knob.distance (T:110) microsteps to the end of travel and another move is requested, the device will move to the end of travel and then stop.

Summary of knob functionality

  • Turning the knob:
    Moves the device in the direction of knob turn.
  • Pressing the knob:
    Decelerates and stops the device (identical to a Stop command).
    Instantly stops the device, if the device is already decelerating.
  • Pressing and holding the knob for 1 sec:
    Toggles between Velocity Mode and Displacement Mode.