Adjusting The Tension Of The Timing Belt - Brother BAS-311E Service Manual

Chapter 4. Adjustments

12. Adjusting the tension of the timing belt

Note: Be sure to check the home position after adjusting the tension of the timing belt.
w
t
9.8N(1kgf)
3mm
80mm
q
e
r
t
64
e
r
y
u
q
u
BAS-311E.311EL.326E.326EL
Adjusting the tension of X-timing belt
1. Remove the X-feed bracket cover q.
2. Loosen the bolt e of X-pulley base B w, then adjust the
tension using the bolt r.
q
3. Move the X-feed bracket y to the left end and apply a
load of 9.8N (1 kgf) to the center of the X-timing belt B t.
Then adjust the X-timing belt B t with the adjust bolt u
to produce a deflection of 3 mm.
Adjusting the tension of Y-timing belt
1. Remove the belt cover q and the frame side cover w.
w
2. Loosen the bolt r, and move the Y-feed pulse motor
bracket e to adjust the tension of the Y-timing belt.
3. When the power of the machine is turned off, there
should be no slack in the Y-timing belt y and the work
clamp arm u should move back and forth easily.
Adjust the position of the Y-feed pulse motor bracket e
using the bolt t.
When the power is turned on, move the work clamp arm
u back and forth, and adjust the tension of the Y-timing
belt y using the bolt t so that there is no looseness in
the work clamp arm u.
311E