2. CONTROLLED AXES
The names of two basic axes are always X and Z; the names of additional
axes can be optionally selected from A, B, C, U, V, W, and Y by using
Each axis name is determined according to parameter No. 1020. If the
parameter specifies 0 or anything other than the nine letters, the axis name
defaults to a number from 1 to 8.
With two–path control, the names of two basic axes for one tool post are
always X and Z; the names of additional axes can be optionally selected
from A, B, C, U, V, W, and Y by using parameter No. 1020. For one tool
post, the same axis name cannot be assigned to multiple axes, but the same
axis name can be used
with the other tool post.
When a default axis name (1 to 8) is used, the system cannot operate in
MEM or MDI mode.
If the parameter specifies an axis name more than once, only the first axis
to be assigned that axis name becomes operable.
1 When G code system A is used, the letters U, V, and W
cannot be used as an axis name (hence, the maximum of
six controlled axes), because these letters are used as
incremental commands for X, Y, and Z. To use the letters
U, V, and W as axis names, the G code system must be B
or C. Likewise, letter H is used as an incremental command
for C, thus incremental commands cannot be used if A or B
is used as an axis name.
2 With two–path control, when information (such as the
current position) about each axis is displayed on the CRT
screen, an axis name may be followed by a subscript to
indicate a tool post number (e.g.,X1 and X2). This is axis
name to help the user to easily understand which tool post
an axis belongs to. When writing a program, the user must
specify X, Y, Z, U, V, W, A, B, and C without attaching a
3 In G76 (multiple–thread cutting), the A address in a block
specifies the tool nose angle instead of a command for axis
If C or A is used as an axis name, C or A cannot be used as
an angle command for a straight line in chamfering or direct
drawing dimension programming. Therefore, C and A
should be used according to bit 4 (CCR) of parameter No.
NAMES OF AXES
D Default axis name
D Duplicate axis name