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CHAPTER 4 SETTINGS AND PROCEDURE BEFORE OPERATION
4
4.5 Zero/gain Adjustment
4.5 Zero/gain Adjustment
Zero/gain adjustment is a process to adjust analog output voltage according to accumulated pulse amount.
Adjust the analog output voltage value according to the analog speed command input of the drive unit used.
Adjust analog output voltage using the check pins on the front of the QD73A1.
For the position of check pins, refer to the following.
Page 56, Section 4.3
(1) Zero adjustment
Adjust the analog output voltage of when accumulated pulse amount is "0". The voltage is adjusted to 0V as the
factory default. Zero adjustment may vary when the module is connected to a servomotor. In that case, perform
zero adjustment again. If the module is used with its zero adjustment being off, the connected servomotor rotates
a little when the power is turned on.
(2) Gain adjustment
Adjust the analog output voltage of when accumulated pulse amount is the maximum. In the factory default
setting, adjustment is made so that the analog output voltage becomes 10V when accumulated pulse amount is
the default value.
Adjust a gain value according to the rated speed command voltage of the drive unit used. The gain value can be
adjusted within the range of 5 to 10V.
When changing the accumulated pulse amount at the gain value output from the default value, set the
accumulated pulse amount by referring to the following reference values.
Accumulated
pulse setting
Accumulated pulse amount (unit: pulse)
Excessive
error
(unit: pulse)
Setting range
Default
value
Reference value for the setting
When the gain value
is 5V
When the gain value
is 10V
Initial setting The initial setting is same as the case where [Selection 4] is set.
[Selection 1] -3700 to 3700 3480
-2500 to -2000
2000 to 2500
-3700 to -3250
3250 to 3700
-3701 or less
3701 or more
[Selection 2] -7400 to 7400 6960
-5000 to -4000
4000 to 5000
-7400 to -6500
6500 to 7400
-7401 or less
7401 or more
[Selection 3] -11100 to 11100 10440
-7500 to -6000
6000 to 7500
-11100 to -9750
9750 to 11100
-11101 or less
11101 or more
[Selection 4] -14800 to 14800 13920
-10000 to -8000
8000 to 10000
-14800 to -13000
13000 to 14800
-14801 or less
14801 or more
[Selection 5] -37000 to 37000 34800
-25000 to -20000
20000 to 25000
-37000 to -32500
32500 to 37000
-37001 or less
37001 or more
[Selection 6] -74000 to 74000 69600
-50000 to -40000
40000 to 50000
-74000 to -65000
65000 to 74000
-74001 or less
74001 or more
[Selection 7] -111000 to 111000 104400
-75000 to -60000
60000 to 75000
-111000 to -97500
97500 to 111000
-111001 or less
111001 or more
[Selection 8] -148000 to 148000 139200
-100000 to -80000
80000 to 100000
-148000 to -130000
130000 to 148000
-148001 or less
148001 or more