OPTIMUM
M A S C H I N E N - G E R M A N Y
Version 1.0.1 2014-05-16
Page 120
Original operating instructions
TU2506 | TU2506V | TU2807 | TU2807V
GB
Example calculation for a infeed of 0.07 mm on lathe TU2807:
The figure 3 in the above calculation is the pitch of the lead screw.
The figure 40 is the 1st drive unit, with 40 teeths on the main shaft of spindle ( shaft lathe
chuck).
Vg calls the feed gear.
- Feed gear (Vg) position "C" transmission ratio = 0.5
- Feed gear (Vg) position "A" transmission ratio = 1
- Feed gear (Vg) position "B" transmission ratio = 2
3.14.6 Example - assembly of gear wheels for thread 0.75mm 1.5mm 3mm
Ligatures from one figure to the follow-
ing one represent the caming of one
toothed wheel to the following one. The
identifier "H" stands for bushing or a
small toothed wheel as an auxiliary dis-
tance, see position 523 of spare parts
drawing.
With the shims, see position 518 and
519 of the spare parts drawing, the dis-
alignment of the gear wheels is
reached.
Img.3-20:
example of gear wheel combination
The designation
a b c
of the threading table is the meaning of the position of selector switch
on feed gear.
3.15
Feed engaging lever
ATTENTION!
Damage to mechanical parts. The automatic feed is not designed to move onto
mechanical stops or the mechanical end of the headstock.
The automatic longitudinal feed and the
feed for thread-cutting are activated and
deactivated using the feed engaging
lever. The feed is transmitted via the
lead screw nut.
Push the feed engaging lever down-
wards. The lead screw nut is
engaged and the automatic longitu-
dinal feed is activated.
Img.3-21:
apron TU2807
Pull the feed engaging lever up to stop the automatic longitudinal feed.
i
3xVgx
40x
Z
1x
Z
3
Z
2x
Z
4xL
----------------------------
3x0 5
x
40x
25
x
20
70
x
75
x
80
---------------------------
0
08
=
=
=
i
3xVgx
40x
Z
1x
Z
3
Z
2x
Z
4xL
----------------------------
3x0 5
x
40x
30
x
20
75
x
80
x
85
---------------------------
0
07
=
=
=
Selector lever
Lathe saddle
Engaging lever
