Plc Reconstruction Using Semi-automatic Multi-tool Lathe C7632-pic, Electrical Faults,
C7632 automatic hydraulic blade turning over possession of the machinery industry
, more a semi-automatic machine. It uses diode matrix and sequential control device Relay Logical control systems, hydraulic turret drive up and down for vertical and horizontal movement in both directions, with Hydraulic chuck. The process automation and production efficient, suitable for high-volume workpiece turning. However, as the machine tool system is used in discrete components, easy to fail, and the maintenance is too much trouble, affecting the machine performance of normal play.Our problem under the machine, using programmable logic controller of the control system to change, to overcome these shortcomings, so that the machine is reliable, easy maintenance, greatly improving the efficiency of machine tool and achieved good economic results .
1. PLC Selection (1) control of the object input and output points shall be machine input control buttons, selector switches work, Travel switch , Close to the switch. Output point is to control the motor contactors, control valves and hydraulic action of the electromagnetic light, etc..
Transformation taking into account the changes to save costs, should be kept to a minimum input and output points. In some cases, input can be a bit of dual-use. If a limit switch is only useful when the automatic cycle, while a button is only used to manually adjust the time, when the input is not enough, we can be sharing one of the two input signals PLC Input, use of PLC's transfer label instructions, does not make the two signal confusion. Similarly, in order to save the output points are nothing to do with control of output point, such as motor start, stop, still controlled by powerful electrical circuit.
(2) control of the object input and output types of the general mechanical processing equipment, using off control, use DC input, relay output type PLC. There are exchange-type and the TTL input level model, while the output is a thyristor-type and DC transistor type, can be adapted to different needs. There are also various special types of modules, such as A / D, D / A module, external adjustable timer / counter module, high-speed counter module.
2.PLC procedure preparation steps (1) the preparation of the table switch machines will be assigned to each input and output devices on the PLC input and output points, or assign addresses. C7532 lathe part of the switch to the table, for example, Annex.
(2) in accordance with the processing requirements, preparation, or switching action flow chart of the table next to C7632 lathe turret of a processing procedure for example, action flow chart shown in Figure 1.
(3) Block diagram of the development process can refer to the method of compiling a computer block diagram. C7632 lathe to process box, for example, in Figure 2.
(4) the preparation of ladder program under the block diagram, the switch statement and action table can be directly in the programmer who programs the keyboard keys. Programming can be carried out by stages, the first section of the preparation of auto-cycle process, manually adjust the procedures of, and initialization procedures of, and after the simulation run sub after the tandem up debugging. The use of transfer, label instructions, the procedure can be complicated to program segment decomposition successful, beneficial programming and debugging. With semi-automatic and manual lathe automatic cycle adjustment procedure, for example, if the switch 1127 to manual / self-selection switch, the following method can be programmed (see Figure 3):
Connected when the switch 1127, the program scans the implementation of the following order: 1,3, ..., 20,40, and then return to the beginning of the implementation of manually adjust the procedure; the contrary, the switch 1127 disconnects, the program scans the order of 2 21, ..., 40, and then return to the beginning of the implementation of auto-cycle process.
Paragraph of its automatic cycle work procedures can be adopted in the controller programming language designed specifically for sequence control preparation step feature.
Ladder was prepared, and run through the simulator simulation, the ladder through the printer to print text.
by: gaga