2086 – Oil Clamp / Unclamp Device Error (A 18.6)

           

           The oil Clamp / Unclamp device is a pressure switch which ensures the pressure delivering to the axis pixels is enough to hold the work piece. If this pressure is less than the desired value it may causes to severe accident. So, the Clamp / Unclamp pressure switch generates a signal when the pressure the less and results in alarm.

                                     

When this alarm occurred do the following

         1.First ensure the pressure setting of the pressure switch is correct ( if it is more than the desired, set it)

        

         2.The electric relay which operates the solenoid valve is not working. (Check the relay output, we can find the output in PMC signal status).

                                 Y6.0 – M33 Clamp

                                 Y6.1 – M34 Unclamp

          3.The solenoid which performs the Clamp / Unclamps operations is not working.

          4.The pressure switch itself is defective.(We can find the feedback if the pressure switches in PMC Signal Status)

                   For 4^th axis : X10.4 – M33 Clamp limit Switch (M33AFN)

                               X10.2 – M34 unclamp Push Button (M34SW)

                    For 5^th axis : X11.3 – M33 Clamp Limit Switch (M33BFN)

                              X11.1 – M34 unclamp Push Button (M34SW2)

M Codes for Clamp / Unclamp are – M 33 = Clamp

                                                         M 34 = Unclamp 

Note : Repeat the same if the alarm occurs in 5th axis.

Axis clamp Alarm

1.1015 4^thaxis clamped

2.1016 5^thaxis clamped

                This alarm occurs when the pressure to the axis is less, this cause in the movement of the axis while job is going and results in the damaging work piece. The clamp is nothing but a disc break uses to hold the axis tightly in the work position. The pressure detecting device is a pressure switch placed parallel to the hydraulic oil hose. For example the required pressure to give good breaking is 5 bar, we need to set the pressure switch setting to 5 bar. The possible causes to occurring alarm are

                

1.The hydraulic pump is delivering less pressure.

2.The electric relay which operates the solenoid valve is not working. (Check the relay output, we can find the output in PMC signal status)

           Y5.4 – M40 Clamp Relay, Y5.5 – M41 Unclamp Relay.

           Y31.2 – M50 Clamp Relay, Y313 - M51 Unclamp Relay.

3.The solenoid which releases the hydraulic pressure to the tank (Results freeing the hydraulic break) is defective.

4.The pressure switch itself is defective.(We can find the feedback if the pressure switches in PMC Signal Status)

        X6.5 – 4^thaxis M40 Clamp Finish, X6.7 – 4^th axis M41 Unclamp Finish.

        X36.2 – 5^thaxis M40 Clamp Finish, X36.3 – 5^th axis M41 Unclamp Finish.

After troubleshooting the problem for checking run the following program in MDI mode

For 4^th Axis

               M121 – Call pallet A

               M41 - 4^thaxis unclamp

               GO B50 – Angele of rotation in Degrees

               M40 – 4^thaxis clamp

               M30 – Program Rewind

For 5^th Axis

               M122 – Call pallet B

               M51 – 5S^thaxis unclamp

               GO B50 – Angele of rotation in Degrees

               M50 – 5^thaxis clamp

               M30 – Program Rewind