At present, the on-line maintenance instrument can only carry out the on-line test and static characteristic analysis of the devices on the servo driver circuit board, whether it is completely repaired must go through the whole machine test and inspection, therefore, the best way to check whether the power supply of the equipment is supplied to the injection molding machine circuit board according to the requirements.

[2] look first and then measure.

Tools: multimeter and magnifying glass. When holding a circuit board that needs to be repaired by a servo driver https://www.plcdealer.com/panasonic-servo-drive-msda023a1a-expedited-shipping-original-new_p474.html, it is a good habit to visually test it, if necessary, use a magnifying glass. The main reasons are as follows:

A, whether there is a broken line;

B, whether the printed circuit board connection line on the server circuit board has broken, adhesion, etc.;

C, whether there is a disconnect phenomenon of discrete components such as resistance, electrolytic capacitance, inductor, diode, transistor https://www.plcdealer.com/mitsubishi-melsec-aj65vbts2-16t-transistor-module-cc-link-16-sink-spring-clamp_p652.html

D.Did anyone repaired the servo driver? What components have you moved? Whether there are false welding, leakage welding, insertion reverse and other operational errors;

E, After determining the absence of the above conditions, use a multimeter to measure the resistancevalue between the power supply and the ground of the server circuit board at first, if the resistance value is too small, only a few or more ohms, indicating that there are components on the server circuit board that have been broken through or partially broken down, we must take measures to find out the broken components. The specific method need servo drive maintenance circuit board power supply, with hands to touch the temperature of each device on the server circuit board, feel hot will be the key suspect object.

F.If the resistance value is normal, the purpose of measuring the resistance, diode, transistor, field effect transistor, dialing switch and other discrete components on the board with multimeter is to ensure that the measured components are normal first. The  maintenance reason  of our servo driver is the problem can be solved by multimeter should not be complicated.

[3] Easy first and then difficult.

Servo driver maintenance using circuit on-line maintenance instrument, electric soldering iron, marker. In order to improve the test effect, some technical processing should be done to the repaired board before the online function test of the server circuit board, in order to weaken the negative influence of all kinds of interference on the test process as much as possible.

The specific servo driver maintenance measures are as follows: the preparation before the test will short circuit the crystal oscillator, welding the next foot to open the circuit to the large electrolytic capacitance, the charge and discharge of the capacitance can bring interference also.

[4] external and then internal

Use tools: if the situation permits, best to find the same good board as the servo drive maintenance board as a reference,then use the two-rod VI curve scanning function to carry on the good and bad contrast test to the two boards, the starting contrast point can start from the port, and then from the table to the inside, especially the capacitance comparison test which Can make up for the multimeter online difficult to detect whether the leakage of the defect.