Arsenal FU 321M, Руководство по эксплуатации и техническому обслуживанию, Страница: 23 / 64

OPERATING AND MAINTENANCE MANUAL FU 321M 20
SPINDLE GEAR BOX CHANGER
It is a separate unit mounted on the left side of the body. It is shown in Fig.9.
FEED GEAR BOX
It is mounted on the knee left side. The feed gear box is driven by an electric
motor through a rubber spider.
KNEE
All mechanisms realizing the machine feed motions are fitted to the knee
/ Fig.14 /.
The safety clutch (shaft VIII - Fig.14) disengages the feed motion in case of
overloading. It is adjusted to transfer a torque of 140 Nm. In order to adjust the
safety clutch by the nut 1 / Fig.6 / first you have to remove the cover 30
/ Fig.3 / and then take the split pin 2 / Fig.6 / out.
The manual cross feed is switched off by cams 28 / Fig.3 / and microswitches
29 / Fig.3 / and the vertical - by cams 24 / Fig.3 / and microswitches 27
/ Fig.3 /.
When the vertical travel is not used, the knee should be tightened to the body with
the handles 26 / Fig.3 /.
SLIDE, SADDLE AND WORKING TABLE
The slide is moving along the knee. It can be locked to the knee by means of
handles 14 / Fig.3 /.
The saddle can swivel at 45 in both directions. It is locked by screws 2 and 25
/ Fig.3 /.
A semi-automatic device for longitudinal screw backlash compensation is built -
in the saddle. This backlash compensation is required only at climb milling and
is done by handle 16 / Fig.3 /.
The working table is clamped to the saddle by the screws 12 / Fig.3 /.