The machine design has stated that a 2.5 kW electric motor with an input speed of 1000 RPM is needed for the machine bed to move. This motor is connected to a gearbox where the input shaft rotates clockwise and is linked to an output via a lay shaft as shown in the diagram. The overall efficiency of this gearbox is 60%. Gear A has 60 teeth Gear B has 120 teeth Gear C has 40 teeth Gear D has 80 teeth From this information you will need to calculate: a) The gear ratio of the gearbox. Input Output

The machine design has stated that a 2.5 kW electric motor with an input speed of 1000 RPM is needed for the machine bed to move. This motor is connected to a gearbox where the input shaft rotates clockwise and is linked to an output via a lay shaft as shown in the diagram. The overall efficiency of this gearbox is 60%. Gear A has 60 teeth Gear B has 120 teeth Gear C has 40 teeth Gear D has 80 teeth From this information you will need to calculate: a) The gear ratio of the gearbox. Input Output

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A 500 pound weight is attached to a cable that is being lifted by a 10 inch diameter drum. The 48V DC motor selected has a no-load angular velocity of 800 RPM and a stall torque of 500 inch-pounds. A gearbox has been designed to spin the drum as quickly as possible. Assume that there are no friction losses in this system. Determine the maximum mechanical power that the motor can produce in watts. The gearbox output torqueis 100 in lbs.
The max speed for the servo shown is 130RPM when connected to 6V. Assume that the gearbox on your servo is able to output a torque of 1.5 kg-cm while turning at this speed. Using the number of teeth on each gearprovided in the table, determine the torque and rotational speed of the output shaft on the DC motor. HINT: Work backwards from the output shaft and use the equations developed in class that relate the number of teeth to the torque. When working back from the output shaft to gear 7/6, realize that the “torque” transmitted by gear 7 is the SAME as the torque transmitted by gear 6 since they are joined. Then, relate the torque of gear 6 to gear 5 based on their numbers of teeth. Since gears 5 and 4 are actually one piece, the torque in 4 and 5 will be the same (as was the case for gears 6 and 7). Repeat for the other gears, working your way all the way back to the DC motor.
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