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How mach3 reads MBP diagram and converts it into G code

BMP and JPEG bitmap files are loaded bai. This option of MACH3 allows users to generate G-code programs by loading photos. The program will cut different depths according to the different gray levels of the photos, and finally get a workpiece similar to the photo.

First click the Load Image File button to select the image file to be loaded. After the file is loaded, a dialog box will pop up to prompt you to specify the processing area of the image file on the workpiece. According to the G20 of the G-code program to be run In /21 mode, you can choose either imperial or metric units. The dialog box is shown in Figure 8.5. If you select the Keep perspective check box, the Y-axis size will be automatically calculated when the X-axis size is given, so that the original aspect ratio of the original photo can be maintained. If the loaded image is in color, it will be converted before loading For monochrome.

The next step is to select the image copy method, that is, define the tool path when raster processing the image. Raster X/Y

It cuts along the X axis. Every time it reaches the end of the X axis, it moves an increment in the Y axis and then cuts along the X direction. The grating Y/X is just the opposite. The spiral is from the periphery of the image. Draw a circle to the middle. Each raster line is composed of

A series of straight lines, the height of the straight line in the Z axis direction depends on the gray scale of the part of the image

Write G code file

Finally, click the conversion button to load the data into Mach3Mill. A dialog box will pop up to prompt the user to input

Enter the file name of the saved G code file, you should enter the complete file name including the extension, or directly overwrite

For existing files, the file extension is usually TAP.

You can use it for processing. It is reminded that many pirated MACH3 on the market do not have the option of Load Image File in the drop-down menu after installation.

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cnc router

How to operate after loading G code in mach3

When reset does not flash, press cycle start (shortcut key Alt+R) to start

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cnc controller

Use of G code in Mach3

Q:Enter the command G54 x0 z0 in Mach3. The operation is not to zero the current positions of x and z, but to move the x and z axes to the (0, 0) position. What if I want to set the workpiece coordinate system in mach3? How to use the drilling command G73 XYZRLQ in macn3

R:The value of G54 should be preset and stored in mach. G54 means to make the current coordinate system the relative value of the preset coordinate system. You input G54 X0Z0, it is actually a two-step operation, G54, then G01 X0Z0

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cnc controller

Adjust the direction of each axis of mach3

In the setting, the origin limit is set. Find the beginning of the setting origin H and hit √ or × to change the direction back to the mechanical origin

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cnc controller

How does mach3 automatically tap

If you realize mach3 automatic tapping, you need to install the limit switch and write the VB script, then the tool can return to the mechanical origin. VB script is similar to Z-axis tool setting

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cnc controller

Calculate the a-axis pulse of the engraving machine

Mach3, USBCNC system setting: the number of pulses required for 1 degree
(Number of pulses per motor revolution × fine fraction of driver × reduction ratio) ÷ circumference
For example, two-phase motor, subdivision number 16, reduction ratio 5:1
(200×16×5) ÷360=16000÷360=44.44444444

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cnc controller

Does mach3 have RTCP function

Mach3 does not have the five-axis linkage of RTCP. In fact, it only links the bai3 axis. The mach3 system only performs three-axis interpolation. The specific rotation calculations are implemented in the post-processing of the programming software. The actual rotation is to rotate a bit to the left of the rotation axis and then perform XYZ. Three-axis interpolation. Rotate the axis coordinates a little bit and interpolate again. The result is that the G code is quite large, and the curved surface is not a continuous movement into a stepped movement.

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cnc controller

Set the coordinate value of the Z axis of the MACH3

Same as other axes, it should be calculated and set according to the transmission ratio and subdivision number. Upward is positive and downward is negative.

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modify the rotating coordinates of MACH3 A axis to linear coordinates

This can’t

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cnc router

How to adjust the return direction of each axis of mach3

In the setting, the origin limit is set. Find the beginning of the setting origin H and hit √ or × to change the direction back to the mechanical origin

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cnc controller

Machine zero point, machine reference point, and machine origin

Machine zero (machine origin): The design origin of the machine coordinate system (du-intrinsic coordinate system on the machine), and its position on the mechanical hardware is determined by the manufacturer. It is the origin of the machine tool coordinate system and a fixed point on the machine tool. It is not only the reference point for establishing the workpiece coordinate system on the machine tool, but also the reference point for machine tool debugging and processing.

With the different types of CNC machine tools, the machine origin is different. Usually the machine origin of the lathe is set at the intersection of the chuck end face and the spindle center line, while the machine origin of the milling machine is set in the positive direction of the three axes of the machine X, Y, and Z. Sports extreme position.

Machine reference point: The machine tool zero point is not known when the numerical control device is powered on. In order to correctly establish the machine tool coordinate system when the machine tool is working, a machine tool reference point (measurement starting point) is usually set within the movement range of each coordinate axis. , Usually go back to the reference point automatically or manually to establish the machine coordinate system and activate the parameters.
In CNC machine tools, there is also a clear understanding of the definition of the machining coordinate system and the meaning of tool setting.

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cnc router

origin of the workpiece and mechanical origin

The machine origin is the origin of the machine coordinate system, which is set when the machine manufacturer produces the machine;
The working origin is set by the operator when machining parts, and it is also the origin used in programming