Festo MPS - Proximity Sensor (Picalfa, Lifting Cylinder)

6. Commissioning
92
© Festo Didactic 655633
6.4.4 Proximity sensor (PicAlfa, lifting cylinder)
The proximity sensors are used for end position sensing of the cylinder. The
proximity sensor is sensitive to a permanent magnet mounted on the piston of the
cylinder.
Prerequisite
– PicAlfa module is assembled, mechanical end stops are adjusted.
– Lifting cylinder is tubed up.
– Compressed air supply switched on.
– Proximity sensors are wired up.
– Power supply unit switched on.
Execution
1. Use the manual override of the solenoid valve to place the cylinder piston in the
position which you wish to interrogate.
2. Shift the sensor along the cylinder axis until it switches, switching status display
(LED) is on.
3. Shift the sensor a few millimeters further in the same direction until it switches
back (LED is off).
4. Place the switch half the way between the switch-on and the switch-off position.
5. Tighten the clamping screw of the sensor with a hexagon screwdriver A/F 1.3.
6. Start a test run to check if the sensor switches at the correct point
(advance/retract cylinder piston).
Documents
• Data sheets
Proximity sensor SME-8 (150857) in the directory English\4_Handling\Data
sheets on the CD-ROM supplied.
• Operating instructions
Proximity sensor (646518) in the directory English\4_Handling\Operating
instructions on the CD-ROM supplied.
• Assembly instructions
Handling station in the directory English\4_Handling\Assembly instructions on
the CD-ROM supplied.