CM602all_EJM8AESM_Service Manual.pdf - 第639页
Machinery Part Replacement Remark 12-Nozzle Head Unit Item Adjust the tension of the short belt. Install the θ -unit. 8 See " θ -Unit Removal." Section 5-10-8 7 A djust the tension o f the two belts. This pulle…
Machinery Part Replacement
Remark
12-Nozzle Head Unit
Item
Re
p
lace the θ-motor.
Allen key 3 mm
M4 x 12L 2 pcs.
Mount the
p
late
(
B
)
on the θ-axis housin
g
.
6
5
The connector is on
this side.
Pressing the end of the
hollowset against the D-
shaped cut, fix the shaft and
the pulley (C) in place.
The D-shaped cut
should face the
hollowset.
ホロセット
：C組み付け
済
D-shaped cut
of the motor
shaft
Should NOT be
raised when
fixed.
Insert these
dowel pins into
the holes of the
plate (B).
Press D against the
timing belt and adjust
the tension.
Hollowset:
coupled with C
Hollowset:
coupled with C
1. Mount the plate (B) on the θ-axis housing (A).
Make the D-shaped cut of the motor shaft face the hollowset (coupled with the pulley C).
Insert the dowel pins (coupled with A) into the holes of B.
2. Fix the pulley (C) and the motor shaft with the hollowset (coupled with C).
Fix the hollowset onto the D-shaped cut of the motor shaft. Press down C to avoid letting C rise.
3. Centering of the motor
If the pulley (C) does not rotate smoothly, center the motor. (Ex. Loosen the bolts that fix the motor
onto the plate (B).)
4. Fit the tension adjuster C (D) onto the θ-axis housing (A) with (3) and (4).
Pressing D against the timing belt, fix it onto A with (3) and (4).
5. Fit the tension adjuster B (E) onto the θ-axis housing (A) with (3) and (4).
Pressing E against the timing belt, fix it onto A with (3) and (4).
6. Adjust the tension of the timing belts by controlling the tension adjusters (D, E, and F).
Great care must be taken for the surrounding of each pulley when adjusting the tension.
EJM8A-E-SMA051006-A01-00
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Machinery Part Replacement
Remark
12-Nozzle Head Unit
Item
Adjust the tension of the short belt.
Install the θ-unit.
8
See "θ-Unit Removal."
Section 5-10-8
7
A
djust the tension o
f
the two belts.
This pulley should be connected with
the θ-axis motor.
Tension gauge
How to adjust the tension of the short belt (two belts)
1. Loosen the tension-adjuster-holding bolt.
Loosen the bolt for the section to be adjusted. Do not loosen the two bolts at the same time.
2. With 18.5 +/- 1.5N-pressure applied to one belt with tension gauge, rotate the θ-axis motor five
turns manually, and tighten the tension-adjuster-holding bolt.
With 10-N tension applied to the belt, fix the tension adjuster.
However, to release the excessive tension applied, rotate the θ-axis motor approximately five turns.
3. Repeat the procedures for the other belt.
Dowel pin
EJM8A-E-SMA051006-A01-00
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Machinery Part Replacement
Remark
12-Nozzle Head Unit
Item
Nozzle θ ad
j
ustment
Jig
Mount the head.
See "12-Nozzle-Head-Unit
Replacement."
Section 5-10-1
9
10
Holding
setscrew x 2
Ji
g
1. Mount the nozzle holder (B) onto the holder (A).
2. Fit the nozzles (C) onto the nozzle holder (B).
3. Loosen the holder (A)-holding setscrews.
Loosen the two setscrews on each position of A so that the nozzle can be rotated.
4. Adjust the nozzles (Cs: 1 to 6 and 7 to 12) with the jig, and tighten the holding setscrews.
Adjust 1 to 6 first, and then adjust 7 to 12 with 1 to 6 kept adjusted.
Adjust the direction of Cs with the jig.
5. Once 1 to 6 and 7 to 12 have been adjusted, check the jig can be set correctly.
* If adjustment fails, the jig cannot be set.
EJM8A-E-SMA051006-A01-00
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