Brother RH-9820 Service Manual page 117

A
Assemble as shown in the
illustration.
0964B
C
Standard installation of motor unit (idler gear adjustment)
B
Place the pulse motor X assembly (10) against the idler
gear (4) so that the amount of play is 0.02 mm or less
within a range of 130° as shown in the illustration, and
then tighten the two set screws (9).
0965B
1) Place the feed base (c) onto the bed (b) so that
Y feed guide shaft (a) is positioned in the center
of the hole in the front of the bed (b).
2) Loosen the two set screws (7) of the idler gear
(6) in order to engage the X rack (e) and the
idler gear (6) while the X rack (d) and the idler
gear (4) are engaged in the standard position.
3) Set so that the screw stop (A) of the pulse
motor X assembly (10) and the two set screws
(9) of the feed gear (8) are in the positions
shown in the illustration.
4) While pushing the idler gear (4) and idler gear
(6) to engage them with the X racks (d) and (e)
at opposite sides, install the motor unit (f).
5) Tighten the two set screws (7) so that there is
no thrust play in the idler gear (6).
* If only removing the motor unit (f), steps 2 and
5 in the adjustment procedure for the idler gear
(6) can be omitted. (If carrying out any
disassembly or assembly which changes the
positions of the X racks or if re-adjusting the
backlash, carry out the full procedure.)
RH-9820
6. ASSEMBLY
0966B
0967B
0968B
108