The working principle and characteristics of the lathe CNC system


The CNC system of the lathe is composed of CNC unit, stepping servo drive unit and deceleration stepper motor. The CNC unit adopts MGS--51 single-chip microcomputer. The control program of the CNC unit is the core of realizing various functions. The specific processing length, moving direction and feed speed are determined. With the support of the central processing unit, the control program, according to the input processing program data, is calculated and processed to send out the required pulse signal, which is amplified by the driver and then driven. Stepper motor, the mechanical load is driven by the stepper motor to realize the automatic control of the machine tool.
1. Open LCD interface planning to meet the customization needs of machinery manufacturers
2. High-definition LCD display, the lathe system has a conversational tool calibration function, and the interface is more friendly
3. Resolution can be set to 7 digits, fully closed-loop control structure, higher control accuracy
4. Rich tool compensation function
5. With mechanical backlash compensation and screw pitch error compensation functions
6. Unique program handwheel test function, anti-collision machine, safer operation
7. With program simulation, single section, skip section and program restart function, the function is more powerful
8. In addition to supporting the standard G code, T code and S code programming of lathes, it also provides a variety of fixed cutting cycles, compound cycles and MACRO macro programming.
9. The program storage capacity is 512 K bytes, and the NC program group is up to 1000 groups
10. Provide RS232C standard interface, which can be connected to a personal computer (PC) to easily realize program transmission

working principle
The numerical control system of the machine tool is composed of numerical control unit, stepper drive unit and deceleration stepper motor. The numerical control unit adopts MGS--51 single-chip microcomputer. The control program of the numerical control unit is the core of realizing various functions. In the parts processing program, Given the specific processing length, moving direction, and feed speed, the control program, with the support of the central processing unit, according to the input processing program data, through calculation and processing, sends out the required pulse signal, and after the driver's power amplification, The stepper motor is driven, and the mechanical load is dragged by the stepper motor to realize the automatic control of the machine tool. When machining threads, a spindle pulse generator must be configured to transmit the spindle angular displacement change signal to the computer. The computer performs interpolation according to the set thread pitch and controls the tool holder to process various threads. The system can send or receive S.T.M signals according to user needs to automate machining.
Power-on debugging
Insert the power supply and motor plugs according to the wiring diagram, put the power amplifier switch in the off position, and turn on the system power switch. After the power is turned on, the numerical control unit should work normally. At this time, the operation of the axial flow fan should be checked, and it is strictly forbidden to work when the fan is stopped. Put the power amplifier switch in the ON position. Manually check if the drive is working properly. According to the program input steps, try to input the part processing program, check each function, and then it can be debugged online only after it is normal. Precautions in use If it is found that the rotation direction of the motor is opposite to the set direction during debugging, the direction can be changed through the direction switch. The system has high requirements on the parameters of the power device, so it is not allowed to replace it with other models at will. It is strictly forbidden to insert or pull out the chip while the power is on, or touch the chip with your hands. If welding must be performed during maintenance, all power sources of the system should be cut off first, and all connectors connected to the computer and the outside should be separated. In addition, if welding on the computer, the residual heat of the soldering iron should be used to prevent damage to the computer device. After the system is powered on, if it does not run for a long time, the power amplifier switch should be placed in the off position to avoid locking a phase for a long time, so as to reduce the loss of power devices and power loss. After the system power is cut off, it must wait for more than 30 seconds before turning it on again. It is not allowed to turn on and off the power continuously, otherwise the current working state of the computer will be abnormal, which will affect the use and may damage the components. Be sure to use the system in a relatively clean environment. If the site environment is relatively harsh (a lot of iron filings and dust), the user can add filter sponges at the air inlet and outlet of the system as appropriate. The backup battery numerical control unit is powered by the backup battery to supply power to the RAM chip of the part processing program memory in the computer after power off, so as to save the processing program of the user's parts. Replacing the battery should be done with the computer powered on to avoid losing part programs. When replacing the battery, pay attention to the polarities of "+" and "-", and do not reverse the connection. After plugging in, use a multimeter with a high internal resistance to measure the voltage of the battery socket on the computer. Normal voltage reference value: 4.5V~4.8V.

metal band sawing machine 
Item GT4240 rotary angle
band sawing machine
GT4240 rotary angle (gantry)
 band sawing machine
Max.sawing size(mm) 0 °400, 45° 310, 60° 210
saw blade size(mm) 1960X34X1.1 5160X34X1.1
Saw blade speed(m/min) 27X45X69
Saw wheel diameter(mm) 520
 speed of feed stepless 
Main motor power(kw) 4KW
Hydraulic pump motor power(kw) 0.75KW
Water pump motor(kw) 0.04KW 0.09KW
working clamping  Hydraulic clamping
Drive mode Worm and gear
Overall dimensions(mm) 2300X1400X1800 2300X1400X1800
Weight(KG) 1100KG 1300KG

The ring saw band is tensioned on two saw wheels, and the saw wheel drives the saw band to cut. There are two main types of band sawing machines: vertical and horizontal. The saw frame of the vertical band saw machine is set vertically, and the work piece moves during cutting to cut the curve contour of the sheet and the formed part. The saw band can also be replaced with a file chain or sanding belt for filing or sanding. The saw frame of the horizontal band saw machine is arranged horizontally or obliquely, and feeds in the vertical direction or the direction of swinging around a point. The saw band is generally twisted by 40° to keep the saw teeth perpendicular to the work piece. Horizontal type is divided into scissors type, double column, single column type band saw; according to the usage, it is divided into manual type (economical manual feeding and manual cutting of materials) and automatic type; according to the automation program using the controller, it can be divided into manual type ( Semi-automatic manual feeding) automatic type (automatic feeding and automatic cutting); according to the cutting angle requirements, it is divided into angle sawing machine (can saw the cutting angle of 90 degrees and 45 degrees) without angle, that is, 90 degrees vertical cutting.

Features of Double Column Horizontal Metal Band Sawing Machine Series Band Sawing Machine:

♣Double column structure, vertical lifting, high stability

♣Hydraulic control of cutting speed, stepless speed regulation

♣Work piece clamping hydraulic clamping, easy to operate

♣Customized three-way hydraulic tightening device

♣The product has the characteristics of compact structure, stable performance, simple operation, high production efficiency, strong safety, etc.

♣Saw blade break induction, automatic emergency shutdown


Post time: Aug-10-2022