Okuma OSP-P200L Programming Manual page 233

10-5-3. Outline of Bar Copying Cycle
Rough turning cycle in the longitudinal direction (example A)
(1) The commands in block N0181 position the axes at the tool change point.
(2) With the commands in block N0182, S, T, and M commands for rough cut cycle are selected,
and then the axes are positioned at the LAP starting point.
When no S, T, or M commands are specified in this block, those selected in the preceding
block(s) are effective.
(3) The NAT80 command in block N0183 causes the control to search for the program assigned
the program name NAT80. A rough cut cycle in the bar turning mode is performed with this
program.
When NAT80 is designated in the block starting with G83, a high-speed bar turning cycle
(LAP4) is carried out.
The cutting conditions for the rough turning cycle are also specified in the same block.
D : Depth of cut
F : Feedrate
U : X component of stock removal in finish turning cycle
W : Z component of stock removal in finish turning cycle
If M85 is designated in this block, tool retraction to the AP starting point at the completion of
rough turning can be canceled. This eliminates unnecessary tool motion which is generated
when the same tool is used in the next machining process.
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When no F word is designated in this block, the feedrate commanded last is effective.
(4) The commands between G83 and G81 are taken as the commands to define the blank material
shape, and the commands between G81 and G80 are taken as the commands to define the
finish contour.
The first element coordinate (Za, Xa) and the second element coordinate (Zh, Xh) are
compared, and since Xa is smaller than Xh in this example, the first element coordinate is
changed to (Za, Xh). (Longitudinal cutting is carried out between the first and second shape
elements.)
Then, first the X-axis, then the Z-axis is positioned at a cutting feedrate at point A" which is
obtained by shifting the X-coordinate of the first element by depth of cut "D" in the negative
direction and then shifting the Z-coordinate by the LAP clearance amount (Lc) in the positive
direction.
Positioning is performed at the rapid feedrate when G00 is designated in the first block of the
finish contour definition blocks, and it is performed at a cutting feedrate when G01 is designated
in the first block of the finish contour definition blocks.
SECTION 8 LATHE AUTO-PROGRAMMING FUNCTION (LAP)
5238-E P-220