Talk about the control system of automatic winding machine difficult analysis

Automatic winding machine power system, mainly for industrial control computer and motion control card power supply, in order to protect the automatic winding machine because of sudden power failure on the system and software, the part and the rest of the electrical part of the equipment does not share a group of power supply lines, but independent distribution of power supply, and for the industrial computer equipped with 500W voltage control power supply. In the case of sudden power failure to ensure the continuous operation of the industrial computer for more than half an hour. The servo driver and the equipment heating system share a power supply system, and the power supply of the system is 1.5 times of the designed power of the equipment.

The servo drive control signal, the system state output signal through the optical coupling isolation output; The input of encoder, i.e. grating ruler feedback signal, limit signal and main control operation switch signal are sent to the control card through the optical coupling isolation chip on the control card. The electrical isolation between industrial computer and other components of equipment is realized. Thus to ensure the maximum industrial control computer and motion control card reliable and stable operation.

The other is to safely ground the equipment housing.

The electrical connection of the control system of automatic winding machine includes two parts, one is the connection between the motion control card and the industrial computer, the other is the connection between the servo system and the motion control card.

The connection between industrial computer and industrial computer is mainly to insert the gold finger of the motion control card into the PCI slot in the industrial computer case and fix it with screws. What needs to be suggested in this part is to wipe the gold finger with alcohol before inserting the control card.

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The control card is connected with the servo driver, grating ruler, encoder, limit signal, control switch signal and status output signal through the special adapter board provided by Gogol Company. The connection between the control card and the adapter board is two special shielding cables for anti-plugging.

The other terminals correspond to different functional input ports, where the core of electrical connection is mainly provided around the servo driver, grating ruler and switching signal and the electrical schematic connection of the control card.

The coded connection between the servo driver and the servo winding machine is a special cable, but the electrical connection of the servo driver is given instructions.

After introducing the general automatic winding machine and winding process, the technical difficulties to be solved by the winding machine control system are put forward. The first difficulty is to solve the problem of synchronous start and stop of the fixed seat and tail seat motor when clamping core rod rotation. In addition to ensuring the coaxiality of the winding machine structure, that is, no obvious relative speed is allowed between the two in the synchronous rotation process. If the relative motion is generated, it will lead to the destruction of the core rod in serious cases and directly lead to the winding failure. If it is light, the pitch of the helix is not up to standard, that is, the pitch is out of tolerance!

The second difficulty is the speed matching problem of the ball screw to the fixed seat motor in the horizontal direction, which requires the linear motion accuracy of the horizontal workbench, the speed matching problem when corresponding to different winding modes, and the stability of the corresponding speed, that is, how to reduce the influence of speed disturbance on the winding pitch. Because of the mismatch of speed and the inaccuracy of motion precision, the winding coil can not meet the process error requirements. For the motion accuracy, we have to mention the mechanical fit error of ball screw itself, the forward error in the process of motion, the return clearance and other adverse factors. Therefore, it is necessary to focus on the positive compensation technology of the lead screw and the horizontal motion table. There is also the absolute zero location technology. The compensation base is provided for error compensation.

Difficulty 3: Constant tension in the winding process, because the instability of the tension will directly affect the consistency of the winding product. As a result, the product cannot be used. On the one hand, the design of the winding machine needs to ensure that there is no large disturbance in the process of wiring, that is, the smooth process of wiring is guaranteed by clever mechanical design. Secondly, the tension sensor is used to monitor the real-time tension data, and the closed-loop constant tension control system is built to achieve constant tension wiring.

Fourth, due to the relatively high hardness of the tungsten strip, large deformation occurs instantly at the contact point of the winding core rod, which is easy to lead to the fracture of the tungsten strip, resulting in unnecessary material waste. Therefore, the system is required to have the heating function to heat the tungsten strip. And the heating temperature needs to remain constant, which requires the construction of a constant temperature control system.