Wireless stepper motor control using zigbee

Wireless stepper motor control using zigbee Savan darji (110283111016)Chirag rathod (110283111013) mohit Shingadia (110283111014)

introductionOur project is about stepper motor controlling using zigbee i.e. wireless stepper motor controlling. Of course there are many wireless approaches like Bluetooth, Wi-Fi etc. Also they have high data rate. But in application like sensing some parameter, motor controlling not that much data rate is required. Disadvantage of above technologies is they consume more power results into shorter battery life. But zigbee consumes less power so using this battery life can be increased. Though the data rate of zigbee is less, but it can be used in such applications.

usefulnessThere are wide range of applications of stepper motor in industries. Our project is about stepper motor control, which is located at remote end. So we can control the mechanical movement of any application of stepper motor like position control of an antenna, robotic arm movement remotely. Also in some places of the plants temperature is high or dangerous chemicals are present. So in those cases it might dangerous for worker to work in such environment. So it is convenient to control mechanical movement remotely with the help of stepper motor. Also our project is about wireless controlling, so wire networks are not required. It can work wirelessly up to 30 m (indoor) and up to 90 m (line of sight).

Block diagram

Micro controller(atml89c51)The AT89C51 is a low-power, high-performance CMOS 8-bit microcomputer with 4K bytes of Flash Programmable and Erasable Read Only Memory (PEROM). The device is manufactured using Atmels high density nonvolatile memory technology and is compatible with the industry standard MCS-51 instruction set and pin out. The on-chip Flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory programmer.

Zigbee and zigbee-proThe XBee and XBee-PRO RF Modules were engineered to meet IEEE 802.15.4 standards and support the unique needs of low-cost, low-power wireless sensor networks. The modules require minimal power and provide reliable delivery of data between devices. The modules operate within the ISM 2.4 GHz frequency band and are pin-for-pin compatible with each other.

Bipolar Windings & Wire Colors INNER CONNECTIONS AND ROTATION DIRECTION BIPOLAR (PARALLEL)

INNER CONNECTIONS AND ROTATIONDIRECTION BIPOLAR (PARALLEL)

USB Board (Receptacle)

It is a socket for zigbee, which can be connected to the USB port of laptop via USB data cable of that board. There is also driver software available to support this hardware with laptop, which can be downloaded from internet. Main function of this board is to convert serial data into USB compatible data and vice versa. This is done through the FTDI IC mounted on USB board. In addition to this it also converts 5 V into 3.3 V, which is necessary for zigbee. Pin spacing of zigbee does not match with the hole spacing of PCB. So we must use either USB or serial board to mount zigbee, which has socket for zigbee.

XCTUX-CTU is a software which is useful for zigbee modules. This software is useful for configuration of zigbee devices as well as sending or receiving data through zigbee devices. We have to configure zigbee modules once before we use it into our application. Configuration includes PAN id, destination address device type e.g. router, coordinator, end device etc. In console / terminal window whatever we write, it sends that data in ASCII standard to USB port, where zigbee module is connected. Zigbee module will transmit it to other zigbee device. Here, some screenshot of X-CTU is illustrated.

XCTU SOFTWARE

Remote end sends acknowledgment according to time that motor takes for that rotation. Now when operator sends any command for motor rotation and if motor would have not rotated because of any reason like power supply problem, lose connections then also remote end will send the positive acknowledgment by calculating time for that rotation. This is like disadvantage of our project. By interfacing tachometer to sense the rotation of motor and monitoring it by controller this problem can be solved.We enter the password in X-CTU terminal screen. Password is visible in the X-CTU screen. To get rid of it interface this software with other software which has security feature so that it does not show the password. So anyone who sees the screen of laptop cannot see the password and it will be protected. FUTURE EXPANSION

CONCLUSIONWe can control the degree of rotation of stepper motor in either direction i.e. clockwise or anticlockwise as remotely. Stepper motor is used in wide area of application. Zigbee module can be used for wireless ad-hoc approach. We can implement wireless handshaking commands for fulfillment of our project through efficient use of microcontroller 8051 with zigbee module. With the help of these assembled components we tried to implement such project which can fulfill our objective. We get success to achieve it. During implementation of this project, we learn many things about zigbee and its utilization in practical world. As per our objective we tried to develop such system which have layman approach with wireless authorized access and after a very long learning process we achieved our goal with the help of so many experienced persons guidance. We hope our efforts become helpful for others.

REFERENCESwww.youtube.comwww.ti.comwww.digi.comwww.nmbtc.comwww.topwin6.com