78 CHAPTER 6: OPERATION
QUICK LOAD SERVO 80 S2
5.2.3. Position / torque
End of bar position
The end of bar position determines the moment when the bar feed
enters the loading cycle.
Usually, the end of bar position is adjusted as closely as possible
behind the clamping system of the lathe (approximately 5 mm or a
1/4" behind the chuck jaws or collet pads).This will provide
minimum bar stock remnant.
Regardless of the length of the bars, or parts, the end of bar position
is always the same. In very special cases, a different end of bar
setting needs to be selected.
The length of the remnant may vary:
· The minimum remnant length (Min) is obtained when the
feeding pusher is just behind the clamping device while the last
part is being machined.
· The maximum remnant length (Max) is obtained when there is
not enough material for machining an additional
part (Lp - 1 mm).
Maximum remnant length = Lp - 1mm + Min
Top-cut position
During the loading cycle, the bar is automatically loaded and
positioned into the spindle, outside the clamping device of the lathe
(chuck or actuator).
This positioning corresponds to a value (Z)programmed by the
operator, which is equal to the distance between the measuring cell
and the position of the material in the lathe clamping device.
With this system, the setting is the same for any bar length.
Auxiliary end of bar position (option)
Depending on the lathe and its interface, the auxiliary end of bar
may be used in several ways, for example, to control the opening
and the closing of an additional steady rest in the lathe. The setting
is identical to the End of bar signal.
Torque rate during high feed rate (%)
Depending on the diameter of the bar, the bar feed system will
automatically select an appropriate pushing torque and speed. The
operator may modify this selection if necessary. When the material
to be loaded has a high specific weight, the torque must be
significant. The contrary applies if the specific weight of the bars is
low.
Pusher torque rate during part feed out (%)
Same principle as above.
POSITION
END OF BAR SIGNAL:
[@@@@]MM
ESC ENTER
AUXILIARY END OF
BAR POSITION:
[@@@@]MM
ESC ENTER
TORQUE RATE DURING
HIGH FEED RATE
ACCORDING TO BAR
DIAMETER:
[@@]%
ESC ENTER
TOP-CUT POSITION
[@@@@]MM
ESC ENTER
PUSHER TORQUE RATE
DURING PART FEED OUT
AND ACCORDING TO
BAR STOCK DIAMETER:
[@@]%
ESC ENTER
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