8 . T r i a l r u n ( F i g . 6 )
The machine is designed specially with plunger
automtic lubricating system, so it can run with nor-
mal speed. In ordervto increasing the using time of
machine, when the machine left outvof operation for
a quite long time is used again. Turn off the rubber
plug top of the machine head, oil it thoroughly, then
lift the presser foot and run at a low speed
with
1500 spm, observe the spurt through oil flow window,
as the lubrication si well, keep the running test at
the low speed about 20 mintues, increase the speed
gradually, after month
s running, according to the
conditions which operate, then increase up to proper
sewing speed.
’
-3-
6
A
C
