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1) (i) Explain the difference between the following two types of motion controls used in CNC machines:

(a) Point to point or position control

(b) Contouring or continuous path control

Give on example each of their application.

2) A stepper motor is used in a CNC positioning system, for driving the table through a lead screw of pitch = 3 mm. The control resolution for the table movement is specified as 0.01 mm. Determine

  1. Point to point or position control
  2. Contouring or continuous path control

Give on example each of their application.

3) A stepper motor is used in a CNC positioning system, for driving the table through a lead screw of pitch = 3 mm. The control resolution for the table movement is specified as 0.01 mm. Determine

  1. The number of pulses which the motor should give per revolution.
  2. The size of step angle of the motor.
  3. The linear travel rate of the table.

The motor works at a pulse rate of 200/s 

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