Feed Mechanism (1) - Brother HE-800A Service Manual

3-4. Feed mechanism (1)

4185Q
4186Q
1. Install the two linear bushes (2) for the feed guide shaft B (1) to the bed.
2. Install the two ball bearing stoppers (3) with the two screws (4).
3. Place the linear bush (5) onto the feed arm support (6) and install it with the two retaining rings (7).
4. Pass the feed arm support (6) through the feed guide shaft A (8), and install it provisionally to the bed with the
two bolts (9).
5. Pass the feed guide shaft B (1) through the feed arm support (6) and align it with the reference lines A, and then
tighten the set screw (10).
6. Tighten the two bolts (9) so that the feed arm support (6) moves smoothly.
7. Install the two ball bearings (11) to the bed.
8. Place the timing belt (12) onto the pulley B assembly (13), and then insert the support shaft (14).
9. Install the pulley B assembly (13) to the support shaft (14) with the two set screws (15).
10.Install the motor mounting bracket (16) to the feed pulse motor (18) with the four bolts (17).
11.Install the pulley A assembly (19) so that there is a gap of 0.5 mm between it and the motor with the two set
screws (20).
12.Place the timing belt (12) onto the feed pulse motor (18), and then provisionally tighten it with the three screws
(21) and plain washers (22).
13.Push the motor mounting bracket (16) in the direction of the arrow with a force of 100 N, and then tighten the
three screws (21).
14.Gently tighten the bolt (23) and the nut (24).
* If there is no tension gauge available, apply a force of 5 N at the middle of the timing belt (12) span and adjust so
that the amount of deflection at this time is 3.5 mm.
15.Place the belt holder (25) onto the timing belt (12), and then install it to the feed arm (6) with the two bolts (26).
4189Q
HE-800A
3. ASSEMBLY
Align the pulley
support shaft (14)
with the worked
surface of the bed
4188Q
4187Q
4190Q
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