The motor is connected to the main shaft, which has an incremental rotary encoder with a resolution of 1600 lines. The main shaft has a diameter of 150 mm and rotates at variable speeds. A second shaft extends from the rear of the system and also has a diameter of 150 mm, connected to a turntable that moves 1 meter per revolution. Based on this setup, here are the questions: 1. What is the current speed of the spindle and the motor? 2. What is the length of each pulse generated by the encoder? 3. If the turntable moves 2000 mm, how many pulses does the encoder produce? If any information is missing, please make reasonable assumptions and explain your approach. **Answer:** 1. To determine the current speed of the motor, you can count the number of pulses generated by the encoder over a specific time interval. For example, if OB35 is set to trigger every 1000 ms (1 second), the number of pulses read during that time represents the motor's speed in revolutions per second. Multiply that value by 60 to convert it to revolutions per minute (RPM). This method allows for real-time speed measurement without complex calculations. 2. Since the encoder is directly attached to the motor shaft, one full rotation of the motor results in 1600 pulses. The circumference of the motor shaft is calculated as π × diameter = 3.14 × 150 mm = 471 mm. Therefore, the length of each pulse corresponds to 471 mm ÷ 1600 = 0.294375 mm. This means that for every pulse, the motor rotates approximately 0.294375 mm. 3. If the turntable moves 2000 mm, the total number of pulses produced by the encoder would be 2000 mm ÷ 0.294375 mm/pulse ≈ 6794 pulses. This calculation assumes that the movement of the turntable is directly proportional to the motor’s rotation and that the encoder accurately tracks the motion. These calculations rely on the assumption that the encoder is correctly mounted and that there is no slippage or mechanical error in the system.
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