07Lecture-lathe

07Lecture-lathe - raw stock is assumed to be rough. A...

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ENGR3300U – Integrated Manufacturing Systems Lecture 07 CNC Lathe Programming Part I Today’s lecture: Overview of CNC Lathe Programming – Not in book 1
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1.0 Introduction G-code programming for the lathe is similar to the mill, but there are differences. Sample G-codes and M-codes for the lathe are given in handout. For milling, we use X, Y and Z-axis. For the lathe, we only use the X and Z-axis. 2
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Illustration of X-axis and Y-axis 2. Unlike milling where we use G90 and G91 to switch between incremental programming and absolute programming, in lathe we use U, W. Absolute X Y Z Incrementa l U - W 3. Diameter programming In CNC lathe, we think in terms of “diameter” when specifying coordinates in the X-axis. Point #1 = 0.2” above part Point #2 = right on the part Point #3 = 0.05” above the part N10 G00 X2.4 Z0 N20 X2.0 N30 U0.1 Example 3
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4. Where is Z0? In practice operator usually setup z0 to be 0.10” from the end since the end face of the
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Unformatted text preview: raw stock is assumed to be rough. A facing operation is usually required to clean up the edge. 5. Cutting of the part After the work is done, you will have to cut of the part. This is done with a parting tool. Assume parting tool is 0.157 wide. Suppose you want to have a finished part 4.5 long, then you will need to clamp your part to allow for cut off. 6. Constant surface speed control G96 For the lathe, it is common to use G96 to so that the chuck automatically adjust the spindle speed to maintain a constant surface speed of the tool relative for the part. Specifying a value with G50 limits how fast the spindle can go. 4 7. Tracing Program Lecture-07-partO001.pdf Making front chamfer with turning tool Making back chamfer with parting tool 5 6...
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This note was uploaded on 04/16/2011 for the course ENGR 3330 taught by Professor Turro during the Spring '11 term at UOIT.

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07Lecture-lathe - raw stock is assumed to be rough. A...

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