PLC turns the application in transforming in lathe numerical control

The operation of 1 lathe asks lathe machines hodometer face, whorl to wait commonly. Asking its movement is general is X, Z is entered to speed, labour, retreat quickly. In machining a process, can undertake automatic, hand is moved, the changeover such as the circle outside the car and car whorl; And can undertake weak condition is operated. 2.

2The unit process of cargo bandling of the problem lathe that system of PLC numerical control needs to solve is more complex, and the sequence control that PLC applies to a movement only commonly. Want to use PLC at dominating lathe action, must solve 3 problems: Graph 　 of graph of principle of system of 1 numerical control 1) the harmony of the signal that how generates drive servo orgnaization and X, Z to the movement; 2) how to change feed system rate; 3) the change that how car whorl contacts transmission and whorl lead inside implementation. Reach PLC its to control module and corresponding executive component combination, these problems can be solved. 2.

The numerical control of bed of be open to traffic of control principle general of system of 3 numerical control is changed transform work even if change tool carrier, X, Z amount to to accuse to control to feed. The basis transforms a characteristic, servo component uses a pace to enter electric machinery, execute open loop to control a system to be able to satisfy a requirement. Z is taken to pulse equivalent 0.

01mm, x is taken to pulse equivalent 0.

005mm. Choose transistor output PLC. Drive pace arises by process designing into signal of electric machinery pulse, through program generation different frequency pulse implements speed change. X, Z can use operation or program automation through inputting a hand to the movement. The pulse signal of car whorl arises by generator of main shaft pulse, input end through receiving PLC with door circuit, frequency conversion of classics PLC program gets what needing the pulse of lead. Tool carrier dislocation, lathe tool is entered, retreat can be moved by the hand or control from traverse foreword. Graph 1 amount to accuses systematic principle to pursue. [Input of 3 PLC of 1] 　 　 , output (I/O) the lathe operation that check the number designs certainly is: Start always stops, Z, X is entered to speed, labour, retreat quickly; Tool carrier, invert; The hand is moved, changeover of whorl of automatic, weak condition, car. Accordingly, the input needs at 14 o'clock. The basis pursues 1 output needs at 9 o'clock. I/O join graph is shown 2 times like the graph (with 3 water chestnut F1S-30MT) for exemple. 　 of graph of join of graph 2 I/O 4 driver (echelon pursues) design 　 4.

Hand of design of structure of 1 total order is moved, the choice of program of whorl of automatic, weak condition, car is used jump turn the instruction comes true. Graph 3 it is block diagram of total order structure. If add up to X12 (X13, X14, X15 disconnects) , its often are shut disconnect, executive hand uses a program; If X12 disconnects, x13 is complete go up, the program jumps over hand traverse foreword, index reachs P0 point, execute automatic order. Graph 　 of block diagram of 3 total orders 4.

Foreword of traverse of hand of design of graph of echelon of foreword of 2 hands traverse, voluntary program needs to be designed according to specific spare parts, here is entered to speed, labour with Z only, the motion that withdraws quickly is exemple try to explain. If the graph is shown 4 times,its echelon pursues. Graph 4 Z is to graph of echelon of hand traverse foreword below state of order of executive hand traverse, press X0, y1 puts through, had made starting preparation. Press X2, auxiliary relay M0 puts through. Time through T63 combination of the contact that reach Y2, the pulse signal that generates frequency to be 103/2i (I is timing time, the basis needs set, the unit is Ms) , drive Z to speed. Should press when X3 (M0 disconnects) , m1 puts through, the pulse that M1 and timer T32 combination make Y2 produces frequency to be 103/2j (J>i) , by Y2 output, implementation labour is entered. Press when X4, m0, Y3 puts through at the same time, electric machinery inverts quickly, implementation is retreated quickly. Length of be confined to, other program echelon pursues slightly. [Lathe of numerical control of 5 last words is in 2] 　 　 the application in our country mechanical manufacturing industry is developing quickly, but price of machine tool of high accuracy numerical control is high, and there are a large number of figures in actual production the spare parts with general requirement of not quite complex, precision, this needs the treatment of numerical control lathe with common precision. In the meantime, our country has beds of a large number of practicable general be open to traffic, undertaking counting accusing to change transforming to these lathe is to use little investment to increase production the efficiency, efficient way that improves beneficial result. Lathe numerical control is changed previously transform those who use is be valid of Z80, 8031 chip the core part that controls a system, its price is more expensive and the system is more complex. Regard the numerical control of lathe as the system with PLC, have cost low, system is simple, adjust convenient wait for an advantage, be sure to be able to get applied extensively. CNC Milling CNC Machining