Setup And Adjustments - Jet GH-1640 ZX Operating Instructions Manual

6.8 Z-axis rapid feed (option)
When Z-axis rapid feed is needed:
- Disengage the longitudinal travel handwheel (C, Fig 7).
- Disengage the auto feed
set lever (G, Fig 7) to the
- Engage the longitudinal feed.
set lever (E, Fig17) to the
(push left and down).
- Rotate the rapid feed switch (M, Fig 17) in the desired
direction
Warning:
Before operating the Z-axis rapid feed, the longitudinal travel
handwheel (C, Fig7) must be disengaged (pulled).

7. Setup and adjustments

Warning:
Setup and adjustment work may only be carried out
after the machine is protected against accidental
starting. Turn off the main switch and press the
emergency stop button!
7.1 Turning between centres
Mount the workpiece fitted with the drive dog between
centres. The driver is driven by the face plate (Fig 18).
Fig 17
position (push down).
position
7.2 Taper turning with tailstock
Turning up to a side angle of 5° can be achieved by off-
setting the tailstock.
To offset the tailstock, loosen the locking handle (A, Fig 19),
loosen the front adjusting screw (B) and take up the same
amount on the rear adjusting screw.
Tighten the adjusting screws and the locking nut to hold the
tailstock in position.
The workpiece must be held between centres and driven by
the face plate and drive dog.
After taper turning, the tailstock must be returned to its
original position.
Turn a test piece and adjust until the machine turns a
perfect cylinder.
7.3 Taper turning with top slide
By angling the top slide, tapers may be turned.
Loosen two nuts (B, Fig 15) and rotate the top slide
according to the graduated scale.
13
Fig 18
Fig 19