Understand how to select and check abrasive wheels before use. Understand how to handle and store abrasive wheels. Understand and interpret the marking system of abrasive wheels. Understand the characteristics of abrasives and their uses. 
Understand the legislative requirements and responsibilities of abrasive wheel operations. Carry out a risk assessment and implement control measures, including emergency procedures. Identify the health and safety requirements for abrasive wheel operation. The machining is carried out as high velocity (200 m/s) abrasive particles are issued from the nozzle onto a work piece traversing under the jet.At the end of this course, you will be able to: The machining enclosure is essential to contain the abrasive and machined particles in a safe and eco-friendly manner. The abrasive particles are then carried by the carrier gas to the machining chamber via an electromagnetic on-off valve. The mass flow rate of abrasive (15 gm/min) entering the chamber depends on the amplitude of vibration of the sieve and its frequency. The sieve is constantly vibrated by an electromagnetic shaker. The abrasive particles enter the chamber from a hopper through a metallic sieve. Then the carrier gas enters a closed chamber known as the mixing chamber. To remove any oil vapour or particulate contaminant the same is passed through a series of filters. The gas is then passed through an air dryer to remove any residual water vapour. The carrier gas is first passed through a pressure regulator to obtain the desired working pressure. 
Generally oxygen is not used as a carrier gas. Gases like CO2, N2 can also be used as carrier gas which may directly be issued from a gas cylinder. also fig shows the other major parts of the AJM system.
In AJM, air is compressed in an air compressor and compressed air at a pressure of around 5 bar is used as the carrier gas as shown in Fig.
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