Engineering, 18.11.2019 23:31 papabosue
Problem 7: a 3-phase stepping motor is to be used to drive a linear axis for a robot. the motor output shaft will be connected to a screw thread with a screw pitch of 1 mm. we want to be able to have a spatial control of at least 0.05 mm. a) how many poles should the motor have? (5 points) b) how many pulses are needed from the controller every second to move the linear axis at a rate of 90 mm/sec? (5 points)
Answers: 2
Engineering, 04.07.2019 18:10
Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1
Answers: 1
Engineering, 04.07.2019 18:20
Have a greater impact on maintenance productivity than any other support group. (clo5) a)-the top management b)-inventory and purchasing c)-sub-contracting d)-cmms
Answers: 2
Engineering, 04.07.2019 18:20
Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?
Answers: 3
Engineering, 06.07.2019 02:30
Define thermoplastic polymers and thermosetting polymers in terms of their structures, and (ii) describe briefly a process suitable for the production of products from each type of polymer.
Answers: 3
Problem 7: a 3-phase stepping motor is to be used to drive a linear axis for a robot. the motor out...
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