NIMS Computer Numerical Control (CNC) Machining Practice Exam

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What does G41 code allow for in CNC machining?

Tool radius compensation left

G41 code is used in CNC machining to enable tool radius compensation to the left of the programmed path. When this code is active, the CNC machine compensates for the radius of the cutting tool, effectively adjusting the machining path so that the tool can achieve the desired dimensions while accounting for its size. This is crucial when working with contours and curves, as it ensures that the tool maintains the correct offset from the programmed path, which is particularly important for achieving precision in the finished part.

Using G41 is common when the tool's physical diameter differs from what is accounted for in the programming, allowing for adjustments that lead to more accurate machining results. This feature enhances the versatility of CNC machines, as it allows for various tool sizes to be used without needing to rewrite the entire program or make meticulous manual measurements.

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Tool radius compensation right

Spindle speed adjustment

Tool path reversal

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