Fagor 8055 FL, Operating Manual

Page: 134 / 210

·134·
Operating manual
CNC 8055
CNC 8055i
3.
WORKING
WITH OPERATIONS OR
CYCLES
·TC· O
PTION
S
OFT
: V02.2
X
Threading c
ycle
3.8.5 Basic operation. Face threading
The machining steps in this cycle are as follows:
1. If the operation has been programmed with another tool, the CNC will change the tool and will
move to the change position if so required by the machine.
2. The spindle starts with the speed selected and in the direction stated. Depending on the spindle
turning direction, the thread will be clockwise or counterclockwise.
3. The tool approaches the theoretical corner in rapid, keeping the safety distance selected
according to axes X and Z.
4. The threading is done in successive passes until the total depth is reached. The depth of each
pass will depend on the selected model.

Depth depending on the pass number

,

2,

3,

4, etc.

Depth keeping the increment between passes

constant.
Each threading step is carried out as follows:

Rapid move to the corresponding programmed depth. This move will be made according to
the penetration angle (

) of the selected tool.

Threading of the programmed section, first along the defined profile up to the distance from
the end of the thread (

) and then exit threading up to the final coordinate. The feedrate F
cannot be varied with the feedrate override switch while threading; it will stay at 100%. At
the beginning of the machining operation on large lathes, when cutting long threads, the
spindle speed may be overridden in the first passes to prevent the part from bending.

Fast backwards to the approach point.
5. Once the operation or cycle has ended, the tool will return to the position it occupied when calling
the cycle; i.e. to the point where [START] was pressed.
When executing an entire part, combination of operations or cycles, the tool does not return to
that point after executing each cycle.
6. The CNC stops the spindle, but it keeps the machining conditions set; tool (T), feedrate of the
axes (F) and spindle speed (S).
Z
X
Xf, Zf
Xi, Zi
Z
X
Z
X
Xf, Zf
Xi, Zi
