Jakobsen SJ16, Руководство по эксплуатации

Страница: 5 / 13

The cross-feed selector L has three posi­
tions:
Left position: Continuous, rapid traverse.
Intermediate position: Intermittant cross­
feed at table reversals.
Right position: No cross-feed.
The increments for the intermittant cross­
feed are adjusted on the knob N; the stem
carries a scale.
The lever R: see the chapter ,,automatic
downfeed".
Air in the Hydraulic System
will disturb the functions.
The air is eliminated as follows:
Table dogs and cross-feed dogs are placed
in their extreme positions.
Run the table at a low speed; make the
table reciprocate a few times with full stroke
by manupulating the lever E.
Let the saddle go the full travel a few times
using the rapid cross movement.
Whenever the motions become jerky or
unstable, this de-airing operation should be
performed.
Manual Crossfeed Control
When the handwheel X is to be used:
Run the saddle towards the column with
the hydraulic rapid traverse and leave the
lever M in inward position and the lever
L
in left position; leave the pump running.
5
Automatic Downfeed
is engaged by turning lever S forward. The
downfeed-increments are adjusted on the
knob T; one division on the stem is equi­
valent to one division on the downfeed hand
wheel. The total stock removal is adjusted
on the slip W, while lever Sis in the neutral
position. When the slip W hits the pointer U,
the downfeed stops. When the pointer U is
turned backwards, the downfeed will con­
tinue until it is stopped by the operator.
The lever R:
Left position: Automatic downfeed at every
saddle reversal.
Right position: Automatic downfeed at
the table reversal in one end.
The position is for plunge-grinding only.
Adjustment of the Hydraulic System
The deceleration of the table-reversals can
be adjusted.
On page 23 is shown the valve unit. On top
of the housing is shown a plug 533 covering
the adjusting screw 532. When the screw
no. 532 is turned clockwise, the table will
be further decelerated at the reversals, and
the reversals will be smoother, but slower.
When this adjustment is made, the screw
should be turned only
¼
turn at a time.
Mounting the Wheel
Careful balancing of the wheel is essential
for the quality of the work.
A new wheel should be mounted on the