
5.AUTOMATIC OPERATION B-63943EN-1/02
- 584 -
5.8 EXACT STOP/EXACT STOP MODE/TAPPING
MODE/CUTTING MODE
Overview
NC commands can be used to control a feedrate in continuous cutting
feed blocks as described below.
- Exact stop (G09)
The tool is decelerated in a block specifying G09, and an in-position
check (*1) is performed. When the feed motor falls in-position, the
tool is moved by the next block. This function may be used to produce
a sharp edge at the corner of a workpiece.
- Exact Stop Mode (G61)
When G61 is commanded, deceleration of cutting feed command at
the end point and in-position check is performed per block thereafter.
This G61 is valid until G62 (automatic corner override), G63 (tapping
mode), or G64 (cutting mode), is commanded.
- Tapping Mode (G63)
When G63 is commanded, feed rate override is ignored (always
regarded as 100%), and feed hold also becomes invalid. Cutting feed
does not decelerate at the end of block to transfer to the next block.
This G63 is valid until G61 (exact stop mode), G62 (automatic corner
override), or G64 (cutting mode) is commanded.
- Cutting Mode (G64)
When G64 is commanded, deceleration at the end point of each
block thereafter is not performed and cutting goes on to the next block.
This command is valid until G61 (exact stop mode), G62 (automatic
corner override), or G63 (tapping mode) is commanded. However, in
G64 mode, feed rate is decelerated to zero and in-position check is
performed in the following case;
1) Positioning mode (G00, G60)
2) Block with exact stop check (G09)
3) Next block is a block without movement command
*1 The term in-position indicates that the servo motor reaches in a
range of positions specified by a parameter. See Section
“In-position check” and “In-position check independently of
feed/rapid traverse” for details.
(Example) Tool paths from block (1) to block (2)
0
In-position check
Tool path in the exact stop mode
Tool path in the cutting mode or tapping
mode
<1>
<2>