Jakobsen SJ24, Руководство по эксплуатации

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SJ 24
CHAPTER 3
PREPARATION FOR OPERATION
Dressing the \·Theel.
The grindinr, wheel is carefully fitted on the wheel hub
and mounted on the wheel spindle, whereafter it is dressed
until it is round. Eventuallv the· sides are dressed until
they are runnine.
11
The wheel is dressed bv means of a diamond mounted in a
holder and placed on the table or niarnetic chuck_. The position
of the diamond on the table with respect to the r,rinding
wheel is important for proper dressing. The diamond should
be located slirhtly to the left of the wheel centerline
(about 12 mm - ; in). This is a safety precaution to pre-
vent the diamond from digr,ing into the wheel.
The diamond is passed across the wheel by r.oeans of the Hy­
draulic Rapid Cross Movement (see page 8).
Choose the direction of cross saddle with crossfeed rever­
sing lever
(36)
and turn the crossfeed control lever
(25)
slightly to the right until the required feed is obtained.
FOR GOOD DRESSING IT IS ESSENTIAL THAT THE DIAMOND IS SHARP
SO ABRASIVE GRAINS HILL BE COMPLETELY FRACTURED AND PROJECT
FROI1 �JHEEL BOl�D.
Instructions for the use of the IIvclraulic Over-the-Wheel
Dresser accessory are given on page 17.
Balancin0 the Hheel.
Balancing of the ,,,heel hub and r,rindinr wheel is done by
means of the balancin2 arbor and the balancing stand. Re­
lease all 3 balancing weights. Find the heaviest spot and
place one of the weights here. By placing and rnovinr the
other weiehts symmetrically in proportion to the first
placed wei
r,
ht the unit is balanced as carefully as possible.
To d1
.,
ess and balance the wheel proceed in the following
ma:nner:
1) Fit the wheel to the Hheel hub
and mount the unit on the Hheel
spindle. Uote that the nut, which
fastens the hub to the spindle
has left hand thread. Note the
safety nut.
2) Dress the wheel.
3) Remove the wheel asset:lbbr from
wheel sDindle and balance the
wheel a; descriped above.
4) P-emount assembly on the wheel
spindle and redress wheel before
putting into operation.