At the moment we are revising Pneumatics.
You may find it useful to look at the BBC Bitesize revision site:
http://www.bbc.co.uk/schools/gcsebitesize/design/systemscontrol/pneumaticsrev1.shtml
As part of your personal revision you should practice drawing pneumatic symbols and designing circuits. In the NAB you will have to be able to draw pneumatic circuits from scratch to fit a specification. Try these challenges at home:
1. A pneumatic cylinder is used to open a bus door. Only the bus driver can close the door, but either passengers outside the bus, or the driver can open the door.
You will need - *A double acting cylinder *A 5/2 Pilot Pilot Valve *A Shuttle Valve *3 x 3/2 Push Button Spring Return Valve.
2. On a series of conveyor belts a cylinder is used to push boxes on to the next level of belt. When a box covers an air bleed, the cylinder should outstroke.
You will need a *Uni Directional FCR, *3/2 Low Pressure, Spring Return Valve, *Single Acting Cylinder.
3. A cylinder should outstroke when given a "high signal" from a microprocessor and instroke automatically after a time delay.
You will need *A double acting cylinder, *5/2/ Pilot Pilot valve *Reservoir *Uni Directional FCR *3/2 Solenoid Spring Return Valve
No comments:
Post a Comment