Chapter
Ⅱ
G Commands
59
Ⅰ
Programming
reference position return when the parameter is set to 1.
2.13.5 Level selection command G17
~
G19
Command function:
The level selection command is used to the arc interpolation and the
tool nose radius compensation selection level. Once the system has
selected the level, it can execute the arc interpolation and tool nose
radius compensation on the level.
Command format:
G17 selects XpYp level;
G18 selects ZpXp level;
G19 selects YpZp level;
Command explanation:
G17, G18, G19 are modal G commands.
Xp: X or its parallel axis
Yp: Y or its parallel axis
Zp: Z or its parallel axis
Note 1: Xp, Yp, Zp are determined by the axis addresses of G17, G18, G19 in the block; when the axis
addresses are omitted, the system defaults the omitted are the addresses of the basic axis; the
level keeps when the system does not command G17, G18, G19 blocks.
Note 2: The parameter sets each axis to have three basic axes (X, Y, Z) or the parallel axis.
Note 3: The level remains unchanged in the G17, G18, G19 not be specified.
Note 4: When the system is turned on, its initialization is defaulted to G18 state, i.e. ZX level;
Note 5: When the system repetitively specifies G17
~
G19 in the same block, and No.3403 Bit 6(AD2) is 0,
the last G17
~
G19 word is valid, the system alarms when the parameter is set to 1;
Note 6: The multi-compound cycle command
(
G70
~
G76
)
and the fixed cycle command
(
G90, G92, G94
)
are used to ZX basic axis level; when their functions are specified in other levels, the system
alarms;
Note 7: The motion command is not related to the level selection, besides the arc interpolation and tool
nose radius compensation command, when the system commands the axis beyond the levels, it
does not alarm and the axis can move; when the system selects the axis motion beyond the level
in the arc interpolation command, the system alarms. For example:
……;
G17;
G01 X100 Y50 Z20 F100; the system does not alarm, Z moves
……;
G02 X20 Z50 R100; the system alarms
……;
Example: the level selection: when X and A are parallel axis:
G17 X_ Y_
;
select XY level
G17 A_ Y_
;
select AY level
G18 X_ Z_
;
select ZX level
G17
;
select XY level
G17 A_ select AY level
G18 Y_ select ZX level, Y motion is not relative the level
2.13.6 Exact stop mode G61/cutting mode G64
G61 function: After programmed axis of the block must exactly stop at the end pont of the
block, the next block is executed.
G64 function: When the programmed axis of each block following G64 starts to develerate (it
has not reached the programmed end point), the system starts to execute
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