The application of the PLC in the wire cut machine auxiliary equipment

The application of PLC in the wire cut machine auxiliary equipment newmaker welcome to e hall exhibition hall 3 PLC PLC programmable controller, PLC programming cable. 。 。 This paper introduces the application of PLC in wire cutting machine auxiliary equipment. 的边后卫, MC series host is high functional host, it has a timer interrupt at a high speed. Without touch, on the basis of the original equipment with PLC timer interrupt to sampling on the speed of a cut line machine servo, thus driven on wire cutting machine auxiliary machine servo positioning. Key words: timer interrupt; Step by step instructions; Scan sampling a 1, project profile. Industry is introduced with the improvement of the national health level standard, the demand of the industrial efficiency. Wire cutting machine is widely applied in medical infusion tube, industrial processing number tube, heat shrinkable tube, etc. 2. Customer demand equipment is suzhou vines of automation development. The device is by the special drawer servo controller and 1 the main components of the implementation of control. Original equipment effect is good, but will cut wire in the ground, workers need to straighten out, and the original equipment only 1 m, customers need to line 2 m long, how long the customer request the original servo go, the new workbench to synchronize equal distance away. 3. Solution plan A: use electronic CAM to solve, use the front of the servo signal to drive the new servo and the dynamic and the stop, using PLC to servo back to run the equipment before the location of the manual correction. This solution precision is extremely high, but the equipment modification is not allowed to move the original equipment control circuit, the original servo electronic gear is unknown, so helpless to give up. Plan B: install an encoder, in the original equipment based on PLC for the sampling of the encoder, to real-time change PLC output frequency of the servo. This plan need not move the original equipment control circuit, so choose this solution. To equipment configuration 2000 line 1 omron encoder, 750 w east can servo 1, FBs - 32 MCT. 4. The solution context FBs - 32 MCT host has 20 DC24V input ( 6 200 KHZ, 2 points 20 KHZ, 8 total 5 KHZ) At 12, output ( 6 200 KHZ, 2 points 20 KHZ) And bring a 232 communication port ( Can be expanded to a maximum of 5) 。 PLC has a built-in HSTA timer. Use the timer timer interrupt to sample complete auxiliary equipment servo synchronization operation. 1 second, the control system design. The device with the FBs - hardware configuration 32 MCT host has 20 DC24V input ( 6 200 KHZ, 2 points 20 KHZ, 8 total 5 KHZ) At 12, output ( 6 200 KHZ, 2 points 20 KHZ) And bring a 232 communication port ( Can be expanded to a maximum of 5) 。 Taitung yuan servo motor of 750 w, 1 2000 lines of omron encoder, cylinder number. 2. Control process design when the original equipment manipulator arrived, loosen manipulator before and after grasping the manipulator, the former manipulator to the top job, manipulator grip, before after manipulator grip, manipulator before and after the manipulator backwards at the same time a given distance. Figure 2 - 1 equipment normal boot process 3. 3 the software design. 1 on the technological process of PLC program design from the equipment, we can see the device belongs to the typical step process control. Step ladder diagram of PLC to provide instruction for the order of the mechanical action process control, step ladder diagram is a step by step point ( 步骤) Of the smallest unit. A step into the point of mechanical parts in a step, every step in the sequence is output, or the whole sequence control process, the whole machine is one step one point logic of series or parallel, the step by step by step implementation of the environment, make the person be clear at a glance, the workings of the mechanical on the design, operation and maintenance are convenient. The following figure 2 - 2 step by step instructions for process control, STP1 S0 is the initial step. Step when in this state, if Y0 connect the equipment into the process. Above is the process control programming ideas, through step by step instructions can reduce programming difficulty, improve the readability of the program. Figure 2 - 2 stepper control procedures section three 1, equipment debugging. Equipment at the beginning of the process improvement of debugging with encoder is 600, but the effect of debugging is the manipulator behind and in front of manipulator in the thread state of relaxation, sometimes appear when change into 2000 encoder will again after the PLC high-speed counter to four times the frequency, problem solving, the manipulator and the workbench manipulator with basic motionless. 4 and 1. Effect after improvement of the equipment control technology and control procedures are optimized, the operation of the equipment can completely satisfy the requirements of customers. 的边后卫, MC series simple PLC application in the project reflects its high reliability, strong anti-interference ability, the characteristics of the high cost performance, the speed of the high-speed timing interrupt follow results with the servo electronic CAM. 2. Application experience FBs - MC series PLC controller counting high-speed and high-speed CPU timing interrupt powerful processing capacity can completely close to the effect of servo electronic CAM.
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