Injection molding set top pin does not return what happened?

There is no problem with the oil circuit. Touch the top and stop the switchThere is no problem with the push switchYongtai's old equipment, the kind of relaysHelp you, boss!!!!!!

Check relay, oil circuit, reversing valve, stroke switch

See if the stroke switch is broken, or the pressure is too small.

1. first adjust the travel switch, so that the collision block and stroke switch down a little more distance;2. check the travel switch. Is it affected by the wear and tear of the internal mechanical parts for a long time?;3. check the relay to see if the contact is worn;