CN2476390Y - Numerical control device used in numerical control machine - Google Patents

Abstract

The utility model discloses a digital control device used in a digital machine tool, which is characterized in adopting CPU control chip with an industrial level; connected with 8 pieces of data cable of peripheral device drived by a driver of a piece of data bus; users in RAM area adopting a 628128 memory chip; adopting extended input joint of 74LS244 and expended output joint of 74LS273, meanwhile provided with a communication circuit and a large LCD screen. The utility model is vivid in graph trends, intuitionistic in interface, simple and convenient in operation, which realizes the communication with a common PC machine.

Description

Be applied in the numerical control device in the Digit Control Machine Tool

The utility model relates to the numerical control device that is applied in the Digit Control Machine Tool.

At present, be used for the economical CNC system of supporting medium and small lathe, 8031 single-chip microcomputers that adopt MCS-51 series usually are as central processing element CPU, expand 27C256,6264,8155, chips such as 8255 usually, and the display interface of system is the LED charactron.There is following shortcoming in this series products:

1, control rate is slow;

2, input, output interface are few, the inconvenience expansion;

3, user storage area is little;

4, no communication function;

5, demonstration information is few.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art, provide a kind of figure dynamic simulation, objective interface, simple to operation, and can realize the numerical control device in the Digit Control Machine Tool of being applied in the ordinary PC communication.

The purpose of this utility model is achieved through the following technical solutions:

Design feature of the present utility model is:

1., host CPU adopts technical grade DS80C320 chip;

2., adopt data/address bus control, 8 data lines that connect peripheral components are driven by a slice data bus driver 74LS245;

3., user RAM district adopts 628128 storage chips;

4., communicating circuit is set, described communicating circuit is the data receiving chip with MC3488, is that data send chip with MC3486;

5., adopt multi-disc 74LS244 and 74LS273 to be expansion input, output interface;

6., adopt SED1335 control chip and the supporting use of DMF50840 large-screen lc.

Compared with the prior art, the utlity model has following advantage:

1, the employing of technical grade host CPU in the utility model, its crystal oscillator speed can reach 40MHZ, and instruction execution speed is fast, and operational capability is strong, and good interference free performance is arranged.

2, system memory size of the present utility model is big, and access speed is fast.

3, the utility model can adapt to the functional requirement that the relevant data after CAD, the CAM processing is sent to digital control system.Can realize between system and system easily, the communication between system and the PC.

4, the utility model realizes that full Chinese, full screen show that motion graphics is followed the tracks of under the software of main frame is supported, intuitive display, and people---machine friendly interface, the point-and-shoot operation is promptly learned and promptly can.

Fig. 1 is the utility model system block diagram.

Fig. 2 is the utility model main circuit schematic diagram.

Fig. 3 is the utility model signal input circuit principle.

Fig. 4 is the utility model signal output apparatus schematic diagram.

Fig. 5 is the utility model keyboard interface circuit schematic diagram.

Fig. 6 is the utility model liquid crystal display drive circuit schematic diagram.

Fig. 7 is the utility model lathe input interface schematic diagram.

Fig. 8 is the utility model lathe output interface schematic diagram.

Fig. 9 is the utility model analog output interface circuit schematic diagram.

Figure 10 is the utility model communication interface circuit theory diagrams.

Figure 11 is the input interface circuit schematic diagram of the utility model screw thread grating signal.

By the following examples, in conjunction with the accompanying drawings the utility model is further described.

Embodiment:

Referring to Fig. 1, Fig. 2, the present embodiment host CPU adopts technical grade DS80C320 chip U1.27C512 is as program storage U3 for expansion a slice, in order to storage developer's support programs.At user RAM district expansion a slice 628128 storage chip U4, be used to store user's procedure and some important parameters of system.Adopt 3 GAL16V8 to select device U5, U7, U20 as the sheet of peripheral expansion chip.Adopt a slice DAC0832 as number---weighted-voltage D/A converter U33, be equipped with LM324 chip U34, realize 0---the output of 10V aanalogvoltage, thereby the stepless speed regulation of control lathe master motor.In addition, 8 data lines that connect peripheral components are driven by a slice 74LS245 data bus driver U27, to realize the control to data input, output, improve the anti-interference of transfer of data.

As Fig. 1, shown in Figure 6, adopt SED1335 control chip and the supporting use of DMF50840 large-screen lc LCD.When showing, CPU earlier will data presented delivers in the display memory 62256 and goes, and the data that read in 62256 by SED1335 liquid crystal display control chip are given LCD more then, thereby finish the demonstration of character or figure.

Fig. 2, shown in Figure 10 for another example, present embodiment adopt MC3486 chip U36 and MC3488 chip U35 to form data and receive and transtation mission circuit, with between realization system and the system or the communication between system and the PC.

As Fig. 3, shown in Figure 7, present embodiment adopts 3 74LS244 as buffer input signal device U17, U13 and U10, by GAL16V8 these 3 chips is carried out read operation.When input signal is effective, corresponding optocoupler 4N35 conducting, CPU control GAL16V8 chooses the 74LS244 chip, its state is read among the CPU again, thereby judges it is which kind of signal input.In addition, by a slice 74LS240 chip U32 as the remote control signal input interface.

As Fig. 3, shown in Figure 5, in the present embodiment, form the keyboard matrix interface by 74LS273 chip U29 and 74LS240 chip U28, realize dynamic scan to keyboard.Wherein, as the line scanning output line, the 74LS240 chip reads the row state of button with the 74LS273 chip, sends CPU again to after the ranks combination and handles.

As Fig. 4, shown in Figure 8, present embodiment adopts latch U25, U24, U12, U11 and the U26 of 5 74LS273 as output signal.When lathe is prepared a certain control action of output, at first by CPU through the 74LS245 bus driver, transmit control routine to 74LS273, under the control of GAL16V8, latch, arrive up to next new state.Output signal is delivered to servo drive system after 4N35 photoelectricity is isolated, control moving of workbench; Or oppositely amplify through 3 74LS14 chip U31, U30 and U38 and 3 MC1416 chip U19, U18 and U37, thereby the direct current auxiliary reclay in the control Machine Tool Electric Appliance, drive corresponding A.C. contactor by auxiliary reclay again, the completion logic output function.

Fig. 9 illustrates the analog output interface circuit circuit.8 position digital signals of being sent here by CPU are delivered to number after 74LS245 drives---weighted-voltage D/A converter DAC0832 converts 8 position digital signals to 0V---10V aanalogvoltage, thereby the stepless speed regulation of control lathe master motor.

As shown in figure 11, when the machined into screw thread, the zero pulse SMO of screw thread grating directly delivers to the P3.3 pin of CPU, and feeding pulse SMA delivers to the P3.4 pin of CPU after 74LS14 is reverse.

Claims (1)

1, be applied in numerical control device in the Digit Control Machine Tool, it is characterized in that:

1., host CPU adopts technical grade DS80C320 chip;

2., adopt data/address bus control, 8 data lines that connect peripheral components are driven by a slice data bus driver 74LS245;

3., user RAM district adopts 628128 storage chips;

4., communicating circuit is set, described communicating circuit is the data receiving chip with MC3488, is that data send chip with MC3486;

5., adopt multi-disc 74LS244 and 74LS273 to be expansion input, output interface;

6., adopt SED1335 control chip and the supporting use of DMF50840 large-screen lc.

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