Brother BAS-311E Service Manual page 44

Chapter 3. Assembly
@0
@2
@1
Parallel
@6
@8
w
#3
!5
36
@3
@5
@4
@6
Line
!6
q
BAS-311E.311EL.326E.326EL
9. Attach the Y-axis feed guide @ 0 to the left of the X-feed
bracket @1 , pressing the former against the latter.
10.Attach the Y-axis feed bracket @2 , the cross roller @3 , and
the right of the Y-axis feed guide @ 4 right of the to the X-
@9
feed bracket @1 .
Note: When attaching the Y-axis feed guide @4 to the
#2
right of the X-feed bracket @1 , lightly push it to the
left so that there is no looseness in the Y-axis feed
@8
guide @2 , and tighten the set screw @5 .
#0
#1
11.Tilt the machine head until it stops.
12.Pass the Y-driving shaft @ 6 through the Y-driving shaft
holder !6 .
Align the reference line on the Y-driving shaft @ 6 with the
end of the Y-driving shaft holder ! 6 .
!6
Then, tighten the bolt @ 7 .
Note: Be sure to make the X-feed shaft support @ 8 paral-
lel to the top of the bed to prevent timing belt (Y)
q from being damaged or cut.
13.Raise the machine head.
@7
14.Temporarily attach the presser arm @ 9 to the Y-feed
bracket @2 with the screw #0 .
15.Pass the X-feed shaft #1 through the X-feed shaft sup-
port @ 8 and the presser arm @ 9 , then secure it with the set
screw #2 .
16.Loosen the bolt !5 of the driving P motor bracket w.
When the power is turned off, adjust the driving P motor
bracket w with the adjust bolt !5 so that timing belt (Y)
q is not slack and the presser arm @ 9 moves smoothly
forwards and backwards. Then power on the machine
and adjust the tension of timing belt (Y) q with the ad-
just bolt #3 so that there is no looseness of the presser
@9
arm @9 .
17.After adjustment, tighten the bolt ! 5 of the driving P mo-
tor bracket w.