Siemens SINUMERIK 840C - Manual (Page 843)

12 Functional Descriptions 06.93
12.9.2 Description of function
G98 F... Leading feedrate for a rotary axis in rev/min.
The path feedrate is calculated internally on the basis of the leading feedrate of the path axes
involved.
G98 is modal and belongs to the following G group:
Internal G group division with @36b:
Internal G
group
11
G functions
94 95 96 97 98
MD
M
MD
T
MD MD MD
G group division in all other cases (not for @36b):
Internal G
group
12
G functions
94 95 96 97 98
MD
M
MD
T
MD MD MD
T = Initial setting for turning
M = Initial setting for milling
MD = Initial setting can be set via MD
When the ”Thread cutting position-controlled spindle” function is selected, G98 is
automatically triggered when G36 is called. G98 can also be programmed on its own in a block
in the same way as G94, G95, G96, G97. If G98 is programmed together with several rotary
axes or with linear axes only, alarm 3006 ”Wrong block structure” is triggered.
12.9.2.2 Switching off the functions
The function G36 is deactivated by programming any other interpolation type (G00, G01, G02,
G33 ...) from the 1st G group.
When G36 is switched off, the previous G command from the 12th G group (G94, G95, G96,
G97, G98) becomes active.
The function G98 can also be switched off by programming any other command (G94, G95,
G96, G97 ...) from the 12th G group.
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SINUMERIK 840C (IA)