Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 606)

Cylindrical Grinding Fixed Cycles
Chapter 17
17-32
The G89 cycles contain special features that separate it from other
available cycles. These features include:
Three independent plunge steps occurring at three independent plunge
feedrates.
A micro-feed feature compensates for any wheel wear that occurs
during the plunge portion of the cycle.
A blend operation performed after the wheel has completed the plunge
operation with its own blend feedrate.
This cycle allows programming in both angled-wheel modes (G16.3 and
G16.4). You can also execute this cycle on non-angled wheel
cylindrical grinders. These non-angled wheel grinders execute the cycle
as if in G16.3 normal angled-wheel mode.
Important: The G89 Multi-step Plunge with Blend cycle is not available
on 9/240 grinder systems.
To cancel the G89 cycle use either a G80 or one of the other grinder fixed
cycles. The first G89 block that you program to enter the G89 mode must
at least contain a plunge depth (X) value.
The G89.1 cycle is identical to the G89 cycle but begins with a pre-dress
operation prior to the grind. For clarity this manual only discusses the
operation of the G89 cycle. Refer to page 17-10 for details on the P word
and pre-dress in the G89.1 cycle.
The format for the G89 cycle is as follows:
G89Z__X__R__I__Q__K__F__E__,F__,E__L__P__;
See Table 17.I for a summary of the G89 cycle parameters. See page
17-9 for a detailed description of these parameters. Figure 17.10
illustrates some of these parameters.
17.11
G89 or G89.1 Multi-Step
Plunge with Blend