CNC Lathe | G97 Code | Cancellation of Constant Surface Speed (Quick Guide)

In this article, we describe how to use G97 code for cancellation of constant surface speed in CNC lathe machines with all details and examples

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G97 Code Introduction

G97 is the cancellation of constant cutting speed and storing of final speed set point of G96 i.e. after programming G97 code, the speed at which the spindle was running (when working under constant surface speed) is retained as the constant spindle speed.

This is quick guide for G97 code. You will be able to write CNC Program after read this post but if you want more information or all details, please have a look:
“CNC Lathe | G96 Code | Constant Surface Speed”

G97 Code Example

N5 G96 S250 ;
N10 G01 X26.Z5.F0.21 ;
N15 Z-25. ;
N20 X30. ;
N25 G00 Z5. ;
N30 G97 ;

N5 = Constant cutting speed 250 m/min.
N30 = G97 cancels G96. Spindle speed correspondence to X30 (2650 rpm) is retained. No other information is programmed in this block.


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