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compression molding is used in making parts of complex shapes and varying sizes typically the mold consists of two
describe three different types of proximity sensors in some applications it may be required to sense only two-state
compare and contrast the principles of operation of a dc tachometer and an ac tachometer both permanent-magnet and
the read-write head in a disk drive of a digital computer should float at a constant but small height say a fraction of
what are the typical requirements for an industrial tactile sensor explain how a tactile sensor differs from a simple
the motion dexterity of a device is defined as the ratio the number of degrees of freedom in the devicethe motion
using the usual equation for a dc strain-gage bridge show that if the resistance elements r1 and r2 have the same
level sensors are used in a wide variety of applications including soft drink bottling food packaging monitoring of
the manufacturer of an ultrasonic gage states that the device has applications in measuring cold roll steel thickness
a consider the motion control system that is shown by the block diagram in figure p637i giving examples of typical
consider the two quadrature pulse signals say a and b from an incremental encoder using sketches of these signals show
explain why the speed resolution of a shaft encoder depends on the speed itself what are some of the other factors that
describe methods of improving the displacement resolution and the velocity resolution in an encoder an incremental
an incremental optical encoder that has n windows per track is connected to a shaft through a gear system with gear
consider the following three types of photoelectric object counters or object detectors or limit switches1 through
figure p71 shows a schematic diagram of a stepper motor what type of stepper is this describe the operation of this
in connection with the phase windings of a stepper motor explain the following termsa unifi lar or monofilar windingb
the torque of a stepping motor can be increased by increasing its diameter for a given coil density the number of turns
when a phase winding of a stepper motor is switched on ideally the current in the winding should instantly reach the
consider a stepper motor that has two poles per phase the pole windings in each phase may be connected either in
some industrial applications of stepper motors call for very high stepping rates under variable load variable motor
define and compare the following pairs of terms in the context of electromagnetic stepper motorsa pulses and stepsb
a relatively convenient method of electronic damping uses simultaneous multiphase energization where more than one
briefly discuss the operation of a microprocessor-controlled stepper motor how would it differ from the standard setup
piezoelectric stepper motors are actuators that convert vibrations in a piezoelectric element eg pzt generated by an ac