only 41 For Problems 38-42 (Table 7-28), design a roller chaindrive. Specify the chain size, the sizes and number of teethin the sprockets, the number of chain pitches, and the centerdistance. TABLE 7-28 Chain Drive Design ProblemsNominalInputInput poweroutputProblemDrivernumbertypeDrivenmachinespeedspeed(rpm)(hp)(kW)(rpm)38.AC motorHammer mill3102518.616039.AC motorAgitator75053.7332540.41.6-cylinder engineHeavy conveyor5004029.8250Steam turbineCentrifugal pump220042.Hydraulic driveRock crusher62510028014.977574.6225

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Answered: For Problems 38-42 (Table 7-28), design…

Precision Machining Technology (MindTap Course List)

2nd Edition

ISBN:9781285444543

Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Chapter8: Computer Numerical Control

Section8.1: Cnc Basics

Problem 3RQ: Briefly describe a ball screw and a linear guide.

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3. Figure 4 shows a simplified schematic of the drive system of joint 4 of the PUMA 560. The torsional stiffness of the couplings is 200 Nt-m/radian each, that of the shaft is 400 Nt-m/radian, and each of the reduction gear pairs has been measured to have output stiffness of 2000 Nt-m/radian with its input gears fixed. Both the first and second reductions have n=4. Assuming the structure and bearing are perfectly rigid, a) What is the effective stiffness of gear 1 if the electric motor's shaft is locked? b) What is the effective stiffness of gear 3 if the electric motor's shaft is locked? c) What is the stiffness of the joint (i.e., when the motor's shaft is locked)? In other words, find out the effective stiffness of the output gear 4. - Electric motor -#1 Coupling Connecting rod #2 Coupling -#1 Gear 42 Gear #3 Gear - #4 Gear Figure 4: Simplified version of the driven train of joint 4 of PUMA 560.
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