vb.net barcode reader source code WORKING WITH DC MOTORS in Software

Draw Quick Response Code in Software WORKING WITH DC MOTORS

WORKING WITH DC MOTORS
Scanning QR Code ISO/IEC18004 In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
QR-Code Encoder In None
Using Barcode encoder for Software Control to generate, create QR Code ISO/IEC18004 image in Software applications.
DC motors can often be effectively operated at voltages above and below their specified rating. If the motor is rated for 12 V, and you run it at 6 V, the odds are the motor will still turn but at reduced speed and torque. Conversely, if the motor is run at 18 to 24 V, the motor will turn faster and will have increased torque. This does not mean that you should intentionally under- or overdrive the motors you use. Significantly overdriving a motor may cause it to wear out much faster than normal. However, it s usually fairly safe to run a 10-V motor at 12 V or a 6-V motor at 5 V. DC motors draw the most current when they are stalled. Stalling occurs if the motor is supplied current, but the shaft does not rotate. If there is no stall detection circuitry built into the motor driver, the battery, control electronics, and drive circuitry you use with the motor must be able to deliver the current at stall, or they (along with the motor) could burn out. DC motors vary greatly in efficiency. Many of the least expensive motors you may find are meant to be used in applications (such as automotive) where brute strength, rather than the conservation of electricity, is the most important factor. Since the typical mobile robot is powered by a battery, strive for the most efficient motors you can get. It s best to stay away from automotive starter, windshield wiper, power window, and power seat motors since these are notoriously inefficient. The rotational speed of a DC motor is usually too fast to be directly applied in a robot. Gear reduction of some type is necessary to slow down the speed of the motor shaft. Gearing down the output speed has the positive side effect of increasing torque.
QR Code Scanner In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
Print QR Code In C#.NET
Using Barcode creation for .NET framework Control to generate, create QR Code image in Visual Studio .NET applications.
20.3 Motor Control
QR Code ISO/IEC18004 Creation In Visual Studio .NET
Using Barcode maker for ASP.NET Control to generate, create QR Code 2d barcode image in ASP.NET applications.
Making Denso QR Bar Code In VS .NET
Using Barcode creator for Visual Studio .NET Control to generate, create Denso QR Bar Code image in Visual Studio .NET applications.
As noted earlier, it s fairly easy to change the rotational direction of a DC motor. Simply switch the power lead connections to the battery, and the motor turns in reverse. The small robots discussed in earlier chapters performed this feat by using a double-pole, doublethrow (DPDT) switch. Two such switches were used, one for each of the drive motors. The wiring diagram for these robot motors is duplicated in Fig. 20-4 for your convenience. The DPDT switches used here have a center-off position. When they are in the center position, the motors receive no power so the robot does not move. You can use the direction control switch for experimenting, but you ll soon want to graduate to more automatic control of your robot. There are a number of ways to accomplish the electronic or electrically assisted direction control of motors. All have their advantages and disadvantages.
Drawing QR Code In VB.NET
Using Barcode maker for .NET framework Control to generate, create QR Code 2d barcode image in VS .NET applications.
Printing Data Matrix ECC200 In None
Using Barcode drawer for Software Control to generate, create DataMatrix image in Software applications.
20.3.1 RELAY CONTROL
Encoding USS Code 39 In None
Using Barcode creation for Software Control to generate, create Code 3/9 image in Software applications.
Making Code128 In None
Using Barcode generation for Software Control to generate, create Code 128C image in Software applications.
Perhaps the most straightforward approach to the automatic control of DC motors is to use relays. It may seem rather daft to install something as old-fashioned and cumbersome as relays in a high-tech robot, but it is still a useful technique. You ll find that while relays may wear out in time (after a few hundred thousand switchings), they are fairly inexpensive and easy to use. You can accomplish basic on/off motor control with a single-pole relay. Rig up the relay
Generate USS-128 In None
Using Barcode maker for Software Control to generate, create GS1 128 image in Software applications.
Barcode Maker In None
Using Barcode drawer for Software Control to generate, create bar code image in Software applications.
20.3 MOTOR CONTROL
Create Intelligent Mail In None
Using Barcode encoder for Software Control to generate, create 4-State Customer Barcode image in Software applications.
Making UPC Code In None
Using Barcode drawer for Excel Control to generate, create UPC-A Supplement 5 image in Microsoft Excel applications.
S1* DPDT Switch
Paint UPC - 13 In .NET Framework
Using Barcode maker for Visual Studio .NET Control to generate, create EAN13 image in Visual Studio .NET applications.
Encoding Barcode In Visual Studio .NET
Using Barcode maker for Reporting Service Control to generate, create bar code image in Reporting Service applications.
(Bottom View)
UPC Code Printer In None
Using Barcode drawer for Font Control to generate, create UPC A image in Font applications.
UPC Code Reader In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
Left Motor
Painting Barcode In Java
Using Barcode encoder for Java Control to generate, create bar code image in Java applications.
Barcode Encoder In Visual Studio .NET
Using Barcode encoder for VS .NET Control to generate, create bar code image in VS .NET applications.
S2* DPDT Switch
(Bottom View)
Right Motor
*Center Off (On-Off-On) Momentary, Spring Return to Center
Forward Reverse Off
Switch Side View
FIGURE 20-4 The basic wiring diagram for controlling twin robot drive motors. Note that the switches are DPDT and the spring return is set to center-off.
so that current is broken when the relay is not activated. Turn on the relay, and the switch closes, thus completing the electrical circuit. The motor turns. How you activate the relay is something you ll want to consider carefully. You could control it with a push-button switch, but that s no better than the manual switch method just described. Relays can easily be driven by digital signals. Fig. 20-5 shows the complete driver circuit for a relay-controller motor. Logical 0 (LOW) turns the relay off; logical 1 (HIGH) turns it on (refer to the parts list in Table 20-1). The relay can be operated from any digital gate, including a computer or microprocessor port.
Copyright © OnBarcode.com . All rights reserved.