Arrangement Of Change Gears; Tables For Thread-Cutting; Transmission Ratio - Optimum Optiturn TU 2506 Operating Manual


Swing the quadrant to the left until the gearwheels have engaged again.

Re-adjust gear flank clearance by inserting a normal sheet of paper as an adjusting or dis-
tance aid between the gearwheels.

Immobilise the quadrant with the locking screw.

Attach the protective cover of the headstock and reconnect the machine to the power sup-
ply.

3.14.3 Arrangement of change gears

1. change gear (drive unit)
with 40 teeth, standard

3.14.4 Tables for thread-cutting

INFORMATION
The tables for thread-cutting is located on the machine.
The tables are built up in a way that you may later on assemble the required combination to cut
a thread without having to look up the details. Ligature as orientation for the caming of one
toothed wheel to the following one. The identifier "H" stands for bushing or a small toothed
wheel as an auxiliary distance. This smaller toothed wheel as an auxiliary distance must of
course not be camed in with any other toothed wheel.

3.14.5 Transmission ratio

The gear transmission ratio is the ratio of the driving toothed wheels to the driven toothed
wheels.
Example calculation for a thread of 0.75 mm on lathe TU2506:
Z Z
40x 2x
--------------------------- -
i = 3xVgx
Z Z
2x 3xL
Example calculation for a thread of 0.75 mm on lathe TU2807:
Z
40x 2x
--------------------------- -
i = 3xVgx
Z Z
2x 3xL
Example calculation for a infeed of 0.09 mm on lathe TU2506:
Version 1.0.1 2014-05-16
Z2
Z1
Z3
Z4
L
Img.3-19: arrangement of change gears
4
40x45x60
3x0 5  x
------------------------ -
= =
45x80x60
Z
4
40x50x60
3x0 5  x
------------------------ -
= =
50x80x60
Original operating instructions
OPTIMUM
M A S C H I N E N - G E R M A N Y
Lead screw 3 mm pitch

0 75

0 75
TU2506 | TU2506V | TU2807 | TU2807V GB
Page 119