数控机床操作介绍

1、Intro to CNC Mill Operation: Basics to going from concept to parts Creating a DXF File in SolidWorks Open SolidWorks Create a new part document Open a new sketch Sketch the profile of your part If youre making a mold, only sketch the part profile For a part cutout (polypropylene) you need to also sk

2、etch offset lines for the tool path (offset for tool diameter) Creating a DXF File in SolidWorks Sketch for mold Sketch for cutout Note: dimensioning removed for clarity Red areas are where the mill will cut: Creating a DXF File in SolidWorks Once you are done sketching click “Exit Sketch” Click “Sa

3、ve As” and select Dxf as the file type, name the file and click “Save” A dialog box will open on the left, ignore the options, and click the green check mark Lastly, a window will pop up with a preview of the DXF sketch, click “Save” Congratulations, youve created a DXF Creating G-code from a DXF in

4、 CamBam First open your newly created DXF file in CamBam Multiple entities will need to be joined into one entity (i.e. lines and arcs) Select all bodies in the drawing Open the “Edit” menu and select “Join” In the window that opens enter a value for join tolerance, 1 or 0.1 works fine, and select “

5、OK” Creating G-code from a DXF in CamBam Creating G-code from a DXF in CamBam Next you want to create pockets for the mill to cut out Generally, you can create all of them at once, and CamBam does a good job at knowing where you want to cut For this example, assuming want everything is the same dept

6、h, select all bodies in the drawing Open the “Machining” menu, and select “Pocket” Creating G-code from a DXF in CamBam Creating G-code from a DXF in CamBam A new box will appear in the lower lefthand side First you need to adjust the Cutting Depth Parameters: enter values for “Depth Increment” and

7、“Target Depth,” the rest should be okay as is Next you will want to input “Cut Feedrate” and “Plunge ” values, followed by “Spindle Speed” and lastly “Tool Diameter” Everything else should be left alone until you are more experienced with the mill Lastly, open the “Machining” menu and click “Generat

8、e Toolpaths” Creating G-code from a DXF in CamBam Creating G-code from a DXF in CamBam You now want to take a look at the tool paths and inspect to make sure they are cutting where you want From the previous slide, you can see that CamBam has correctly identified the areas that should be cut Now, al

9、l you need to do is open the “Machining” menu and select “Produce gcode” Choose a file name and click “Save” You now have the G-code needed to run the mill Using the Mill and Running Your G-Code Using the Mill and Running Your G-Code Open the Mach3 software and turn on the mill To load your G-code,

10、click the “Load G-Code” button and open your file Note that the G-code automatically sets the mill to either inches or millimeters Press “Tab” on the keyboard to open the Jog interface and make sure the “Jog Mode” is set to “Cont.” Depending on your DXF, position the mill spindle in an appropriate p

11、osition for X=0 and Y=0, using the left/right and up/down arrows on the keyboard Click the “Zero X” and “Zero Y” buttons To zero Z, bring the mill very close to the work piece using the “Page Down” button on the keyboard, be careful not to plunge the tool into the work piece Once the tool is close,

12、switch the “Jog Mode” to “Step” and set the “Cycle Jog Step” to 0.001 inches or 0.01 millimeters Place a slip of paper between the tool and work piece, and step the mill closer to the work piece until the paper is held tight Click the “Zero Z” button The mill is now zeroed, DO NOT change these zeroe

13、s X and Y are especially important when doing multiple machining steps for SDM You may also want to create channels, or locate from the edge of the work piece so that if your zeroes get messed up, you can reset them with the edge finder Using the Mill and Running Your G-Code Once you are all set up, you can run your code with the “Cycle Start” button