Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 620)

Turning Operations
Chapter 18
18-4
Figure 18.2
Results of Example 18.1
X
25 35
Grinding/Dressing feed
Rapid feed
Z
20
24
28
Grinding
wheel
12061-I
G20 Taper O.D. and I.D. Grinding/Dressing
A G20 block that includes an I word generates a grinding/dressing pass
that produces a taper. The format to grind/dress a taper is:
G20X__Z__I__;
Where : Is :
X__ the grinding/dressing depth for the X-axis at the end point of the grinding move
into the part or the dressing move into the wheel. In incremental mode specify
the amount of infeed, in absolute mode specify the coordinate position at the
desired grinding/dressing depth. X can be programmed as either a diameter or
radius value.
Z__ the length of grind along the Z-axis. In incremental mode specify the amount of
feed across the part, in absolute mode specify the coordinate position of the end
point of the grinding stroke.
I__ the amount of change in the grinding/dressing depth for the X-axis. I is always
an incremental radius value. Figure 18.4 shows the relationship between the
sign of the I value and the way that the cycle is performed. The control adds the
value of I to the X depth to determine the start point of the grinding pass.