Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 610)

Cylindrical Grinding Fixed Cycles
Chapter 17
17-36
E -- medium plunge feedrate
The feedrate entered here is for the medium plunge phase programmed
with I. E must be within the range of legal F words defined for your
system. The Single Digit F Word feature can not be used to assign E word
values. If no value is entered, then the feedrate used for the previous
plunge is also used as the medium plunge feedrate.
This parameter is “cycle modal,” meaning that it needs to be programmed
only once while in the G89 mode. This parameter is reset to zero every
time the G89 mode is canceled. This feedrate can be programmed in IPM,
IPR, or V/D feed modes.
,F -- fine and micro feedrate
The feedrate entered here is for the fine plunge phase programmed with Q
and for any micro feed amount appended on to the fine plunge depth. The
,F word must be within the range of legal F words defined for your system.
The Single Digit F Word feature can not be used to assign ,F word values.
If no value is entered, then the feedrate used during the medium plunge is
also used as the fine and micro feedrates.
This parameter is “cycle modal,” meaning that it needs to be programmed
only once while in the G89 mode. This parameter is reset to zero every
time the G89 mode is canceled. This feedrate can be programmed in IPM,
IPR, or V/D feed modes. When programmed the comma must immediatly
precede the F word (no space).
,E -- blend feedrate
The feedrate entered here is for the blend phase programmed with the K
word. The ,E word must be within the range of legal F words defined for
your system. The Single Digit F Word feature can not be used to assign ,E
word values. If no value is entered, then the feedrate used during the fine
and micro plunge is also used as the blend feedrate.
This parameter is “cycle modal,” meaning that it needs to be programmed
only once while in the G89 mode. This parameter is reset to zero every
time the G89 mode is canceled. This feedrate can be programmed in IPM,
IPR, or V/D feed modes. When programmed the comma must
immediately precede the E word (no space).
L -- spark-out
If a number of spark-out revolutions (L) is programmed in the block, the
axes dwell at the plunge and shoulder depth. L is specified as either the
number of revolutions of the part spindle (feed per rev mode G95), or
number of seconds (feed per minute mode G94 and V/D mode G93). The
L word must be a whole number. You can not program L in fractions of a
revolution or fractions of a second.