Jakobsen SJ24, Руководство по эксплуатации

Страница: 9 / 24

SJ 24
6
THE LONGITUDINAL MOVEMENT
Hydraulic table travel
Set the table trip dogs (22) to give the reouired traverse length.
Ensure that the table reversing lever
(23)
is between the dogs.
Now turn the table speed control lever (24) clockwise and the
table will start traversing between the dogs. The table speed
control lever has four positions,namely:
red mark: stop position
yellow -: minimum table speed
green -: maximum table speed
blue
-: Manual table feed and for operation of
hydraulic wheel dresser.
Note: When starting-up the machine in the morning, table speed
control lever should be opened only slightly to give a
slow rate of travel until the oil has circulated thoroughly. If
the machine i\s cold, maximum table speed may not be obtained
until the hydraulic oil has reached operating temperature.
NOTE:
The longitudinal table cylinder is cleared of air by moving the
trip dogs out in their extreme position and let the table bottom
5-6 times at each end at a very low speed. Whenever the motions
become jerky or unstable this de-airing operation should be per­
formed.
ADJUSTMENT OF THE TABLE OVF.RTRAVEL
The overtravel is the distance the table travels at the end of
its stroke AFTER the dogs has tripped the table reversing lever.
Table overtravel will be greater at high table speeds and when
the machine is cold. The overtravel can be adjusted (reduced)
by means of the adjusting screws No. 27 (Longitudinal movement)
and No. 29 (Cross movement). Loosen the lock nut (28) and turn
the adjusting screw (27) slightly anticlockwise, using a screw
driver, until the required overtravel is obtained. Then loosen
lock nut (30� and adjust the cross movement adjusting screw (29)
so that the cross saddle has travelled its full feed before the
table trip dog, after having reversed th� table movement, passes
the table reversing lever again.