Programming
8.2 Positional data
8-139
SINUMERIK 802D sl Operation and Programming Nibbling (BP-N), 06/2006 Edition
6FC5 398-3CP10-0BA0
8.2.3 Dimensions in metric units and inches: G71, G70, G710, G700
Functionality
If workpiece dimensions that deviate from the base system settings of the control system
are present (inch or mm), the dimensions can be entered directly in the program. The re-
quired conversion into the base system is performed by the control system.
Programming
G70 ; Inch dimensional notation
G71 ; Metric dimensional notation
G700 ; Inch dimensional notation, also for feed F
G710 ; Metric dimensional notation, also for feed F
Programming example
N10 G70 X10 Y30 ; Inch dimensional notation
N20 X40 Y50 ; G70 remains active
...
N80 G71 X19 Y17.3 ; Metric dimensional notation from here...
Information
Depending on the default setting you have chosen, the control system interprets all geo-
metric values as either metric or inch dimensions. Tool offsets and settable work offsets in-
cluding their displays are also to be understood as geometrical values; this also applies to
the feed F in mm/min or inch/min.
The default setting can be set in machine data. All examples provided in this Manual as-
sume the metric default setting.
G70 or G71 evaluates all geometric parameters that directly refer to the workpiece, either
as inches or metric units, for example:
S Positional data X, Y, Y, ... for G0,G1,G2,G3,G33, CIP, CT
S Interpolation parameters I, J (also thread pitch)
S Circle radius CR
S Programmable work offset (TRANS, ATRANS)
S Polar radius RP
All remaining geometrical specifications that are no direct workpiece specifications, such as
feedrates, tool offsets, settable work offsets, are not influenced by G70/G71.
G700/G710, however, influences additionally the feedrate F (inch/min, inch/rev. or mm/min,
mm/rev.).
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