These possibilities have been tested, or useless
If the CNC bending machine, please check the machine parameters of the return voltage, and finally close to the voltage value, you can adjust it.
Loosen the guide rail and check the return circuit
Look at the oil tank is not dirty or oil is not enough to clean the oil tank filter, there may be poor oil absorption.
Look at the oil tank is not dirty or oil is not enough to clean the oil tank filter, there may be poor oil absorption.
Spend some money, from bending machine manufacturers please a teacher to do.
