CM602all_EJM8AESM_Service Manual - 第373页

A F: Put the scale in the direction shown belo w (Scale origin should be on Rough origin PH side.) When inserting the scale, Remove the joint section. Remove the encoder along with the bracket. Fit a new encoder onto the…

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Turn off the power and the air.
Main Body
Remove the side covers.
Remove the scale holding plate.
Machine Part Replacement
2
1
Item
Remove the feeder cover.
Remarks
Allen key 3 mm
Screw M4 (Special) x 2
Phillips screwdriver #2
Flat head screw M3x5L
2 pcs.
3
4
1
2
AF
BR
AR
BF
1
2
EJM8A-E-SMA050111-A01-00
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A
F: Put the scale in the direction shown belo
w
(Scale origin should be on Rough origin PH side.)
When inserting the scale,
Remove the joint section. Remove the encoder along with the bracket. Fit a new encoder
onto the bracket. Install it on the head plate.
5
Remarks
Allen key 3 mm
Screw M4x16L 2 pcs.
Remove the scale from the scale holder. Put a new scale into the holder.
* Scale orientation (For each stage)
Align the scale with the end of the scale
holder. Fix the scale with the plate.
Phillips screwdriver #2
Flat head screw M3 x
5L
2 pcs.
Item
Machine Part Replacement Main Body
6
7
8
Scale
D-mark sticker
Origin mark
AF
BF
AR BR
Origin
Origin
Origin
Origin
Align the scale
with the end of
the holder
Align the scale
with the end of
the holder
Encoder (Head)
Joint
handle it with care.
scratch, break, screw, dirt
EJM8A-E-SMA050111-A01-00
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Adjust the gap.
The size and the quality of the incremental signal are
displayed. Check them at the entire stroke.
Item Remarks
Main Body
9
12
Machine Part Replacement
10
11
Head plate
Bracket
Encoder head
Scale holder
0.15
Connect the adjustment jig PWT18 to
the encoder. Check that the
incremental signal and the reference
mark signal satisfy
the range.
A、B　0.5　．　．　．　．　1　．　．　．　．
15
V
l0（R）
RI
[Reading]
The size and the quality of the
incremental signal are displayed.
Check them at the entire stroke.
X
Quality of incremental
signal
Size of incremental
signal
X
o
Quality of reference-
mark signal
1. Over the entire stroke of the
incremental signal:
size: 0.8 V or more
Quality: The bar should be in the frame.
2. Reference mark signal
Quality: The left and right ends of the bar
should be in the frames.
[Criteria]
Main bod
y
of PWT18
Size and quality of the reference mark
Adjust the bracket with the special shim
until the gap between the encoder head
and the scale is 0.15 mm
Head
Encoder head
Scale
Power 100V
PWT18
o
o
o
o
o
o
o
X
X
X
EJM8A-E-SMA050111-A01-00
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