Single Shot Timing
Single shot timing is defined as a logic process whereby a timer is started by the action of a push button (or similar) causing an actuator such as a cylinder to outstroke (or return) after a delay period. In pneumatics we have to consider what that start action might be, whether we need to be able to interrupt the process with a manual stop, what occurs in the event of loss of compressed air such as the need for a reset button, and so on.
The Timer and Counter Company have produced 3 downloads which between them illustrate 6 different pneumatic circuits. These are intended as guides, your own requirements may be a little different. You can see examples of the typcial components that you will need to make your pneumatic single shot timer circuit work.
In the 54 series single shot circuit we show a basic design using one 54 series timer providing timed automatic stop with a single push/pull control valve. This same drawing includes a repeat cycle time circuit using two timers.
In the single shot timer guide we show 4 typical circuits using mini timers with various manual stop and reset options.
In the detented stop button circuit we show a more complex, but typical operation.
All the push button valves and fittings are available from The Timer and Counter Company as well as the selected timer.
General
The circuits show the timer function and in general are based on either the 3/2 valve mini timer or the 5/2 54 series clock face timer. The mini timer is available in 4 time ranges up to 300 seconds, whilst the clock faced timer comes in 6 time ranges up to 100 hours delay.
Parts List
Our pneumatic circuits show valve numbers and codes for timers, counters, flow regulators etc. A valve table is shown as a seperate download. In this we identify the different possibilities for each valve code. We include push button operated spring return valves with colour alternatives, main pilot / spring return valves with G1/8 or G1/4 ports and so on. Our detail extends to protective covers, exhaust silencers and pneumatic fittings. The circuit parts lists do not include the cylinder, tubing or enclosure, all of which we would be pleased to quote for on request.
