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cmass
03-18-2011, 02:21 AM
Vexing pneumatics problem ...

Have 5 festo M7 2 way solenoid valves in a gang ... all are singles. All are hosed and wired in similar / same manner.

We are having trouble with one of the 5 valves:
- our code can change the status light from a side (extend) to b side (retract)
- the manual actuation can physically change the output of the valve from extend to retract
- when we change state with code through the solenoid breakout, the light changes but the spool does not seem to move
- we replaced the valve twice with no impact

I'm thinking solenoid breakout, wiring but I cannot explain the light changing state but no apparent or observed movement in the spool.

Mark McLeod
03-18-2011, 08:06 AM
If the coil is wired backwards, then the light will go on, but the coil won't work.

quinxorin
03-18-2011, 11:06 AM
If changing the direction does not work, try connecting the leads directly to a 12v battery (both directions) to make sure it works. There is a chance (very low) that the solenoid coil is fried.

The manual button is not a good indication of whether the solenoid works because, on most valves, it physically moves the solenoid, rather than with electricity.