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MAINTENANCE MANUAL > Test Items > Test Function > LINEAR ENCODER
Model
SWJ-320S
Issued 2012.07.19 Revised
5.1.10 LINEAR ENCODER
Outline
Checking the tension of linear encoder scale, and performing the reading test of encoder.
Content
For the linear encoder testing, repeating 3 times the processes of the table below.
The operation at occurring of error is switchable by ON/OFF setting of parameter [ERROR].
ON:
After error, the testing is terminated following capping, and the error is displayed.
OFF:
A buzzer is rang at the position where the error occurs, and the operation is continued. After the
testing is terminated, the error content is displayed.
Test operation
1 Single-way
Checking for the encoder
moving opera-
counting cycle from the
tion:
print home position up to
The carriage
the set range.
moves from the
right position to
the left position
Checking for the differ-
with a high
ence between the motor
speed.
encoder value and linear
encoder value.
2 Return-way
Checking for the encoder
moving opera-
counting cycle from the
tion:
print home position up to
The carriage
the set range.
moves from the
left position to
the right posi-
Checking that there is no
tion with a high
difference on the value of
speed.
linear encoder between
before and after the
movement when being
back to the same position
after high speed moving.
*
The encoder counting cycle cannot be checked in the adjustable-speed range.
The operation width of carriage is specified as the following since the linear encoder having the set width is checked.
(Operation width of carriage)=(Set operation width)+(Adjustable-speed distance)
Therefore, the operation with of carriage is larger than the set operation width.
LCD display after Test completion
Display 1: The motor encoder value and linear encoder value,
which are after the return-way movement completion.
Motor encoder value (mm)
M =3000.0 E =2998.0
DIF:-2.0 mm
The difference between the motor encoder value and liner encoder value
© 2013 MIMAKI ENGINEERING CO.,LTD.
Test items
Purposes
Within the scanning range,
checking for the difference
of scale tension depending
on the position, and check-
ing for the presence of
damage or marks.
Checking for insufficient
or excessive tension of the
linear encoder scale.
Within the scanning range,
checking of the difference
of scale tension depending
on the position, and check-
ing of the presence of
damage or marks.
Checking for the presence
of skipping of scale due to
high speed moving.
Checking for the
reproducibility of encoder
counting.
Linear encoder value (mm)
0.06%
F/W ver
1.0
Remark
LCD display during operation
[M/E DIF]: Displaying 0.
[POS DIF]: Displaying the difference between the
linear encoder value before the first
time move start, and the value of linear
encoder being back to the same position
after the single-way move operation is
performed.
[M/E DIF]: Displaying the difference between the
motor encoder value and the linear
encoder value, in 0.01% unit, after the
completion of the single-way move-
ment.
[POS DIF]:During the first return-way moving
operation, displaying the linear encoder
count value being at the completion of
the single-way movement.
During the second return-way moving
operation, displaying the difference
between the value of the linear encoder
that is before the start of the first move-
ment, and the value of linear encoder
that is at the same position after the
completion of reciprocating movement.
Display 2: The minimum and maximum value of
encoder counting cycle
ENC CYCLE [0.1us]
MIN:265
Rev.
1.0
1
2
3
4
5
6
7
8
MAX:335
5.1.10
R.1.0
P.1
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