How to solve the problem that the motor of the automatic dispensing machine does not reset

Release time：2022-12-08    Click：1010

The motor is characterized by compact size, low price and stable operation. Motors are widely used in industrial control industry, and automatic dispensers are no exception. The motor is used on the automatic dispenser, which can automatically restore the automatic dispenser to the set state after starting. If the motor does not recover after the automatic dispenser is turned on, it indicates that there is a problem with the automatic dispenser. How to deal with it?

How to solve the problem that the motor of the automatic dispensing machine does not reset?

1、 Problems with the emergency stop button of the automatic dispensing machine

Solution: Please check whether the emergency stop button of the automatic dispenser is pressed.

2、 Wiring problem of automatic dispensing machin

Solution: open the chassis, check whether the hardware connection of the automatic dispensing machine is correct, confirm whether the driver is powered on, and confirm whether the driver, emergency stop switch and jumper are set correctly; Please make sure that all flat wires and serial port wires are correctly connected.

Automatic dispensing machine

3、 Incorrect firmware or configuration file of automatic dispensing machine

Solution: The firmware of the automatic dispensing machine may not be upgraded successfully, or the configuration file may not be updated successfully. Re upgrade the firmware and configure the mechanical parameters; Automatic reset is not set.

The dispenser itself is a device to control the amount and time of dispensing glue. Therefore, before using the dispenser, the problems of needles and glue that affect the dispensing quality must be solved, so as to ensure the dispensing effect and product quality.

In the glue dispenser, the glue must be free of bubbles. A small gas will cause many pads to be free of glue, resulting in empty play and unqualified products. Therefore, the connection must be emptied every time the rubber tube is replaced midway. For the solidification of glue, the general manufacturer has given the temperature curve. In practice, higher temperature shall be used for curing as much as possible to make the glue have enough strength after curing.

The viscosity of glue directly affects the quality of dispensing. If the viscosity is large, the glue point will become smaller, even wiredrawing; If the viscosity is small, the glue point will become larger, which may dye the pad. During dispensing, select reasonable back pressure and dispensing speed for glue with different viscosity.

n addition to the influence of glue and the external environment, for the dispenser itself, the screw pump is usually used by enterprises to supply the dispensing needle, so a constant pressure is required to ensure that sufficient glue is supplied to the screw pump. If the pressure is too large, it is easy to cause glue overflow and too much glue; If the pressure is too small, intermittent dispensing and leakage will occur, resulting in defects. Therefore, the pressure should be selected according to the glue of different quality and the ambient temperature of the dispenser. High ambient temperature will make the viscosity of glue smaller and the fluidity better. At this time, it is necessary to reduce the back pressure to ensure the supply of glue, and vice versa.

n practice, we believe that the inner diameter of the tip should be 1/2 of the diameter of the glue dispensing point, so that the glue dispensing effect is Z is ideal. Therefore, during the glue dispensing process, the tip should be selected according to the size of the PCB pad, which can not only ensure the quality of the glue dispensing point, but also improve the production efficiency. Different dispensers use different needles, some of which have a certain degree of stop. At the beginning of each work, the distance between the needle and PCB should be calibrated, that is, the Z-axis height calibration, which is often ignored.

The size of dispensing amount shall be based on work experience. The diameter of the bonding point shall be half of the pad spacing, and the diameter of the bonding point after the patch shall be 1.5 times of the bonding point diameter. In this way, it can ensure that there is enough glue to bond the components and avoid too much glue from contaminating the pad. The amount of glue dispensing is determined by the rotation time of the screw pump. In practice, the rotation time of the pump should be selected according to room temperature, glue viscosity, etc.

In a word, fully understanding the characteristics of the automatic dispenser and the glue used, and adjusting it under the specific temperature environment of the enterprise can ensure that the dispensing products can obtain satisfactory results.