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An end milling operation is carried out along a straight line path that is 325 mm long. The cut is in a direction parallel to the x-axis on an NC machining center. Cutting speed = 30 m/min and chip load = 0.06 mm. The end milling cutter has two teeth and its diameter = 16.0 mm. The x-axis uses a DC servomotor connected directly to a leadscrew whose pitch = 6.0 mm. The feedback sensing device is an optical encoder that emits 400 pulses per revolution. Determine
(a) feed rate and time to complete the cut, and
(b) rotational speed of the motor and the pulse rate of the encoder at the feed rate indicated.
air enters the compressor of a cold air-standard brayton cycle at 100 kpa 300 k with a mass flow rate of 6 kgs. the
With this transfer function, if the loop is closed through a unity feedback, determine the phase margin. You should use direct computation rather than a graphical approach.
An important fluid property is the kinematic viscosity which determines the viscous, or frictional, forces acting in a flow. The kinematic viscosity of air multiplied by 10^6 is given at 350, 450, 500, 550, and 650 K as 20.92,32.39, 38.79, 45.57, and..
a three-blade helicopter blade rotates at 200 rpm. if each blade is 12 ft long and 1.5 ft wide estimate the torque
Determine the force in member CG of the loaded truss, repeated here from Prob. 4/27. The four external reactions at A, B, E, and F are equal in magnitude and are directed perpendicular to the local suppporting surfaces.
a well-insulated turbine operating at steady state has two stages in series. steam enters the first stage at 800
The tank cover is airtight, and the pressure above the water surface is 2 atm gage. The system is at sea level. Determine the max height to which the water stream could rise.
Backlash is a nonlinearity, which is often displayed by robots having gear trans missions. Indicate why it is difficult to compensate for backlash by using sensing and feedback control. What are the preferred ways to eliminate backlash in robots?
a fruit juice containing 30 solids of molecular weight 100 g was placed in a tray length 100 cm height 90 cm width 8
the heaters inside a winter cabin suddenly fail. heat is lost to the outdoors the rate of 150 kjh and the electric
the given figure depicts an indirectly fired gas turbine engine. in the gas turbine engine air is compressed to a high
consider a piston-cylinder assembly containing 0.12 kg of nitrogen at 300 k and 1 atm state 1. the nitrogen is heated
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