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VEX Pneumatics Kit User Guide
Vex Number: VEX-CLASS-PNEU
RobotShop Number: RB-Inn-46
To perform their function, pneumatic cylinders impart a force by converting the potential
energy of compressed gas into kinetic energy. This is achieved by the compressed gas
being able to expand, without external energy input, which itself occurs due to the
pressure gradient established by the compressed gas being at a greater pressure than the
atmospheric pressure. This air expansion forces the piston to move in the desired
direction. The pneumatic cylinders have 2 states. The Single Acting cylinder uses air to
push in one of the states and a spring for return in the second state. The Double Acting
cylinder uses air in both states; push and return.
You can connect the 3 pin connector of the Solenoid Driver to any of the
ANALOG/DIGITAL Ports on the VEX Controller. The Black wire should be closest to
the outside edge of the VEX Controller. Likewise, the White wire should be closest to
the Keyed Slot even though there is no key tab on the Solenoid Driver Cable. You can
control the two states of the pneumatics by controlling the two states of a Digital Output.
By sending a High (1) or Low (0) to the defined Digital Output that you have the
Solenoid Driver connected to, you will be controlling the corresponding pneumatic
cylinder. To change the state of a Digital Output of the VEX Controller, you must have a
Programming Kit.
Specifications
System Pressure: 689 KN/m2 (100 psi)
Tank Volume: 150mL (9.152in)
Cylinder Bore: 10mm (0.394in)
Cylinder Stroke: 50mm (1.987in)
Cylinder max Force: 54N (12lbf)
Cylinder Strokes: 45 strokes from 100psi to 25psi
Single acting cylinder length: Compressed - 6.125in / Extended – 7.5in
Double acting cylinder length: Compressed – 6.125in / Extended – 8.25in
Valve Control: Connects to one VEX Controller I/O port
Reservoir Weight: 0.68lbs
Refill method: Tire pump fitting
Kit 1 is a complete pneumatics add-on for the VEX Robotics system. The cylinders are Single
Acting, meaning they use air pressure to extend the piston, and an internal spring to allow
the piston to retract.
Kit 1A
adds one Cylinder (Air Push, Spring Return) to Kit 1 or Kit 2. Cannot be used without
Kit 1 or Kit 2.
Kit 2
is a complete pneumatics add-on for the VEX Robotics system. The cylinders are
Double Acting, meaning they use air pressure to extend and retract the piston.
Kit 2A
adds one Cylinder (Bi-directional) to Kit 1 or Kit 2. Cannot be used without Kit1 or Kit2.
There are many ways to mount the Pneumatics Cylinders, a few examples are shown
below.