Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 633)

Turning Operations
Chapter 18
18-17
Figure 18.14
Results of Parallel Thread Grinding Example 18.5
Z
X
0.7
0.9
1.5
0.8 2.2
1.0
N1
N2
N6
N4 N8
N5 N9
N3
N7
Grinding
Wheel
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If you program both E and F in the same block, the right-most parameter
takes effect for that block.
The programmed lead remains in effect until another thread lead value is
programmed, the control is reset, or an M02 or M30 end of program block
is executed.
For tapered threads, the thread lead (determined by the F or E word) is
applied along the axis that travels the greatest distance when grinding the
thread. See Figure 18.15.
Figure 18.15
Lead Designation for Tapered Thread
X
Z
Z
X
If Z < X then thread lead is along X
If Z
≥
X then thread lead is along Z
1/E or 1/F
1/E or 1/F
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