normally used to control the A. tooling selection. B. coolant pump and other motors. C. software delays. D. spindle speed. 23.b. The type of motor that’s used with an older indexer controller is the A. brushless motor. B. three-phase stepper motor. C. stepper motor. D. DC servo motor
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23.a. The S functions of an industrial controller are normally used to control the
A. tooling selection.
B. coolant pump and other motors.
C. software delays.
D. spindle speed.
23.b. The type of motor that’s used with an older indexer controller is the
A. brushless motor.
B. three-phase stepper motor.
C. stepper motor.
D. DC servo motor.
Step by step
Solved in 2 steps
- 1. In CNC machine tools, the motors used to control feed rate are: A. Servo motors B. Induction motors C. Stepper motors D. Hydraulic motors 2. The purpose of a feedback device in a CNC machine tool is to provide information of: A. Speed B. Displacement C. Force D. Both speed and displacement 3. Federate on a machining center can be specified in: A. Only feed per revolution B. Either feed per minute or feed per revolution C. Only feed per minute D. Feed per tooth per revolution 4. The correct syntax of an NC block for inclined line milling operation is: A. N-G01 X-F B. N-G01 Z-F C. N-G01 X-Y F D. N-G01 M XY F 5. When the contour or continuous path system is used, A. Tool movement from one point to the next does not have to follow a specific path. 8. Tool travel is controlled along one axis at a time. C. Machine and tool movements are precisely controlled at all times and in all planes. D. None of the above. 6. Which of the following NC blocks is correct? A. N10 G01 M03 X90 Y-15 R22 B.…Problem') A single-phase full-wave AC/AC voltage controller has input rms voltage Vs - 220 V,50 Hz, load R 100 2, and the firing angle a= 60° for the thyristors T1 and T2. Determine the output rms voltage VO and current IO, and the DPF.Please solve last time rejected. For ac voltage controller type with an input of 230 V, 50 Hz is connected to a resistive load of 20 ohms. The circuit is operating with the switch ON for 30 cycles and OFF for30 cycles Determine1)r.m.s output current and2) input power factor.
- 22.a. One common type of electronic circuit component that is used to control the voltage and current to aDC motor is theA. silicon-controlled rectifier.B. resistor.C. capacitor.D. diode.22.b. Which one of the following types of motors can be powered with either AC or DC electricity?A. Servo motorB. Pancake motorC. Universal motorD. Shunt-wound motorExplain the basic structure and working principle of the induction motor controller.A voltage regulator is added to a synchronous generator for automatic field control. The voltage regulator is shown in figure 1. The generator is operating at 60 Hz, and the generator field resistance is Rf = 4Q. Voltage constant k. = 0.022 for the machine. a. The generator is originally loaded with a terminal voltage magnitude of V, = 275 V. In the controller, V = 280 V and Vo = 150 v. The controller has a constant gain of kỵ = 2.5. Find the field voltage V;, the field current I, and Ef. b. The load is changed, and after the field controller has adjusted the field voltage, the terminal voltage magnitude V; has dropped to 265 V. The controller inputs and gain remain the same. Determine the new value of Ef. Vro ey Ve ky Generator Figure 1. Voltage Regulator.
- 21. A PM field servo motor may be equipped with a resolver that is used to A. prevent the brushes from sparking. B. create a voltage that increases with velocity. C. excite the armature windings. D. feed back position information.List some advantages of solid-state control.The system given in following figure, is an example for Gear Assembly for reducing shaft speed Position cog Output shaft DC Motor Potentiometer Feedback path PReference Output Signal Reference Input Signal Electrical Input to DC Motor Error detector ampifier O a. Process Control system b. Numerical control system c. Servomechanism d. Direct Digital Control System
- 1.a. In a DC servo motor system, the tachometer feeds back a voltage that’s proportional to motor speed.Where does this voltage go to?A. The interpolator cardB. The CPU in the main controllerC. The driverD. The axis logic card1.b. A type of feedback device that uses a rotor and senses the position of the motor by means of sine andcosine waveforms is called a/anA. tachometer.B. encoder.C. resolver.D. alternator.14.a. An encoder is a device that is used toA. excite the motor's interpoles.B. feed pack position information.C. reduce brush sparking.D. commutate the field windings.14.b. The letters CEMF are used to describeA. centrifugal forces within a motor.B. the portion of the supplied current that is converted to heat.C. countervoltages and currents created within a motor.D. critical winding currents that should not be exceeded.The input current to a 220v, compound motor at no load is 6 A. The shunt field circuit resistance is 220 ohms; the armature resistance is 0.10 ohm and the series field resistance is 0.80 ohm. What is the SPL? A. 1153.31 W B. 1066.22 W C. 1232.54 W D. 1073.25 W