Today's world is moving at a very fast pace. Some of the very common examples of fast moving objects are air-planes, high speed cars and many more. In our daily life we find many vehicles with fast movement and so it is very important to measure the speed of these vehicles.
In the current state many electric power saw machines operated from different companies with different specifications are available for use on shop floor. These machines are so precise that they can cut metal bars with a minimum time composed of different materials, but they have one and more disadvantage than those that are able to cut a single piece of bar at a time. For industries to achieve mass production, it is necessary to cut metal bars with high rate. Therefore, it is impossible to rely on conventional machines of a single saw frame and need improvement in the technology and design of such machines. With the help of this multi-path power saw machine the four metal bars can be cut simultaneously to get high speed cutting rate and achieve mass production for maximum profit in related companies. As this machine overcomes all the limitations and drawbacks of conventional coal saw machines, it is also useful for small scale industries because of its simple operation and operating conditions along with its compatibility, efficiency and affordable price. This project involves cutting wood, metal, pipe, angle, channel, flat plates, rods and other things. This project is very useful and easy to install by the user. 1.1 Scotch-yoke Mechanism The Scottish yoke is a mechanism for converting the linear movement of a slider into a rotating movement or vice versa. The piston or other alternate member is directly coupled to a sliding yoke with a groove engaging a pin in the rotatable part. The shape of the piston movement is a pure sine wave with time given a constant rotation speed.