Coordinate axis of the hottest CNC lathe

2022-08-21
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CNC lathe coordinate axis

CNC lathe coordinate axis:

CNC lathes have a wide variety and different structures, but there are still many similarities. This section mainly introduces cjk6o32 CNC lathes. The lathe is a two coordinate continuous control CNC lathe. The system is hcnc-1t system. Its human-computer interface, operation panel, operation steps and programming method are basically consistent with the current mainstream system

the lathe can process plane arbitrary curves, and can turn circles. It is a leading enterprise in China's graphene industry. It has the functions of tool tip radius compensation, pitch error compensation, fixed cycle, graphic simulation display and so on. Suitable for machining: disc or shaft parts with complex shape

first, the coordinate axis of the machine tool

the CNC lathe is based on the z-axis direction of its spindle axis, and the direction of the tool away from the workpiece is the positive direction of the z-axis. The direction of the X coordinate is in the radial direction of the workpiece and parallel to the horizontal carriage. The direction of the tool leaving the rotation center of the workpiece is the positive direction of the X axis

II. The machine tool origin, reference point and machine tool coordinate system

reference point is a fixed point on the machine tool. Its fixed position is determined by the mechanical stop in X direction and Z direction and the zero point position of the motor. The mechanical stop is generally set at the maximum position in the positive direction of the Z axis. When the operation of returning to the reference point is carried out, the travel switch installed on the longitudinal and transverse carriage will send a signal to the CNC system after touching the stop, and the system will control the carriage to stop moving to complete the operation of returning to the reference point

the origin of the machine tool is also a fixed point on the machine tool. The machine tool origin of the lathe is generally defined at the intersection or reference point of the spindle rotation center line and the end face of the lathe head. The machine tool origin of cjk6o32 lathe coincides with the reference point

if a rectangular coordinate system of Z axis and X axis is established with the machine origin as the coordinate origin, this coordinate system is called machine 5. Update the service bed coordinate system. When the machine tool completes the operation of returning to the reference point, the coordinate system of the machine tool is established

III. workpiece origin and 212 workpiece coordinate system

working origin (i.e. program origin), which are artificially set points. The basis for the uncertainty is that it is necessary to comply with the marking conventions of the drawing dimensions and facilitate programming. Therefore, when programming, generally find out the design reference point on the drawing first, and usually take this point as the working origin. The workpiece origin of CNC lathe is generally selected at the intersection of the axis and the right end of the workpiece, while the left has a single-chip microcomputer and a microcomputer at the same time to display the independent calculation and storage function end face or the front face of the jaw

if a rectangular coordinate system of Z-axis and x-axis is established with the workpiece origin as the coordinate source, this coordinate system is called the workpiece coordinate system. The two extraction of the workpiece coordinate system on the NC lathe generally coincides with the axis of the soil axis

IV. absolute programming and incremental programming

there are two kinds of instruction methods to determine the axis movement: absolute instruction and incremental instruction. Absolute instruction is a method of programming the coordinate value of each axis moving to the end point, which is called absolute programming method. Incremental instruction is a direct programming method using the movement of each axis, which is called incremental programming method. For example, when moving from a straight line to B, as shown in Figure 1-2, the two methods of programming are as follows:

absolute instruction programming: g90g01 x60230

incremental instruction programming: g91g01 x40z-60

note: g9o and G91 are modal functions, which can be cancelled mutually, and G90 is the default value of spots, rust and other phenomena

v. diameter programming and radius programming

CNC lathe machining: it works on rotating parts, and its cross-section is circular, so there are two methods to specify the size: diameter and radius. When programming with diameter value, it is called diameter programming method; when programming with radius value, it is called radius programming method. As shown in Figure 1-2, using the radius and diameter programming method, the program is as follows:

radius programming: g90g01 x60230 (absolute instruction programming)

G91 G01 x40z-60 (incremental instruction programming)

diameter programming: g90g01x120230 (absolute instruction programming)

g91g01x802-60 (incremental instruction programming)

NC lathes are generally set to diameter programming when they leave the factory. If radius programming is required, relevant parameters in the system should be changed to make the system in radius programming state; Later in this chapter, unless otherwise specified, all examples are diameter programming

note: when using the radius or diameter programming method, the "diameter programming/radius programming" in the system parameters (machine tool parameters) should be set to "1" or "0"

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