OPTIMUM
M A S C H I N E N - G E R M A N Y
Operation
Version 1.0.1 dated 2015-05-27
Page 46
Original operating instructions
TU3008 | TU3008V
GB
the cone surface (fix the bedslide). Now the top slide is twisted in a way that the gauge does not
indicate any travel of the pointer over the whole length of the cone (offset over the handwheel
of the top slide).
Then you may start reaming the lathe as described under point 2. The workpiece might be a
flange for lathe chucks or a face plate.
Img.4-18:
Cone setting with stop measure
4. By offsetting the tailstock as the cone length is larger than the adjustable stroke of the top
slide.
The workpiece is clamped between two points, therefore center holes are required on the face.
They are to be drilled before removing the lathe chuck. The slaving of the workpiece is per-
formed by a pulling pin and a lathe carrier.
The calculated value "Vr" is the offset measure of the tailstock. The offset is monitored with the
gauge (also the return travel).
For this type of cone machining the lowest speed is used !
Annotation:
In order to check the position of the tailstock axis to the rotation axis, a shaft with two centering-
sis clamped between the points. The stand with the gauge is put on the bedslide. The gauge is
aligned 90° to the rotation axis and horizontally brought into contact with the shaft. The gauge
will pass along the shaft with the bedslide. There must not be any travel of the pointer along the
whole length of the shaft. If a deviation is being shown, the tailstock is to be corrected.
Gauge
Advance of depth of cut
Measur
ing- an
d infeed
directio
Feed d
irection
Calculation
or
The tailstock offset must not exceed the value
"Vrmax"
as the workpiece
tumbles!
Example:
Kv = 1 : 40 ; Lw = 150 mm ; L = 100 mm
Vr
Lw
2
Kv
----------------
=
Vr
D
d
–
2
L
-------------
Lw
=
Vr
max
Lw
50
--------
=