If the solenoid still does not operate correctly, disconnect the solenoid from the machine and connect it to a known electrical source. Always measure the voltage with the solenoid connected. Always measure the voltage from the back of the connector. Note: Use a voltage detector or a multimeter with needle-tipped probes to measure the voltage. Make sure the solenoid receives the correct voltage. Inspect the solenoid cables to make sure they are not damaged. If there is not a clicking sound when the solenoid is commanded, make sure the solenoid valve is connected correctly and that the electrical supply is correct. You can also feel the clicking if you place your finger on the solenoid.

The coil area of the solenoid is the black plastic area on most solenoids. Listen for a clicking or buzzing noise from the coil area of the solenoid.If the state does not change, troubleshoot and fix the problem before you continue. Make sure the state of the ouput changes when it is commanded. Go to the I/O tab on the diagnostics screen on the control.You can write a simple program in MDI mode to command the electrical output to the solenoid. Turn on the machine and use the control to activate the solenoid.Remove the exaust muflers from the solenoid and test the solenoid again. A clogged exaust muffler can prevent the solenoid to operate correctly.Note: Do not use the machine before the air supply to the machine is correct. To move the solenoid out of the intermediate state, close the air valve and power off the machine. If you command the solenoid to open or close without the correct air pressure, the solenoid can go into an intermediate state that may not correct itself when the machine has correct air pressure.Side Mount (SMTC) - VF/VM/UMC/EC - Carousel and Pocket - Troubleshooting Guide.Tool Release Piston - Troubleshooting Guide.

Refer to the following troubleshooting guides for more information: Turrets on ST model lathes, TRPs, and Side-Mount Tool Changer Pockets have specific troubleshooting steps.Do not expect the solenoid to operate correctly if the outlets are not connected to the system. Many solenoids will not shift correctly without correct air pressure and back pressure. Make sure the shut off valve is completely open. Make sure the machine receives the correct air pressure and flow.

Mac pneumatic solenoid valves