Reason for the jitter of hydraulic press slide in slow down

The normal operation of the hydraulic press is very smooth. Whether up or down are slow and steady. hydraulic press machine manufacturers  today for you to solve the hydraulic press slider in the slow down when the reason for the jitter:

Four, 1 columns too tight

Processing methods: must add oil.

2, the main cylinder of the hydraulic pressure machine main cylinder pressure is not stable or low support force treatment method: the main cylinder chamber is not stable. Can increase or reduce the pressure of the support valve, or the spring replacement.

3, hydraulic support valve pilot solenoid valve

Processing method: solenoid valve spool is flexible, with the gap is too large, there is a leakage phenomenon