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8-2 NC Code Specifications
Feed rate (F)
The parameter range for F is as follows.
Parameter: feed rate
Function: Feed rate
Acceptable range: Range 1
Effective range: 30 through 7,500 mm/min (1.2 through 295.2
inch/min)
Note: The feed rate for the A axis is dependent on the specifi-
cations of the rotary axis unit installed. For more information,
refer to the documentation for the rotary axis unit.
Reference point (G28)
The reference point is (0, 0, 0) of the Machine Coordinate
System.
Interpretation of Omitted NC Codes
When the format for NC codes is abbreviated and one or more
NC codes are omitted, the machine performs interpretation
as described below. The method of interpretation is specific
to the machine. When you want to make a program generic,
needless omission should be avoided.
+ "NC Code Reference Manual"
Measurement unit (G20 and G21)
When these are omitted, the interpretation is always for mil-
limeter input (G21).
Tool-diameter offset (G41 and G42)
If the D word is omitted when an ATC unit is installed, the
offset number set in the VPanel [Magazine] dialog box is used.
When a tool is grasped by the automatic tool changer, the
tool-diameter offset number assigned to the stocker number
takes effect.
Tool-length offset (G43)
If the H word is omitted when an ATC unit is installed, the offset
number set in the VPanel [Magazine] dialog box is used. When
a tool is grasped by the automatic tool changer, the tool-length
offset number assigned to the stocker number takes effect.
Workpiece coordinate system (G54 through G59)
When these are omitted, the interpretation is always for work-
piece coordinate system 1 (G54).
Dimension (G90 and G91)
When these are omitted, the interpretation is always for ab-
solute specification (G90).
Feed rate (F)
When F is not stated, the feed rate is 120 mm/min.
Spindle speed (S)
When S is not stated, the speed set at VPanel's main window
is used.
110
Chapter 8 Specifications