
2. SETTING α SERIES SERVO PARAMETERS B-65150E/04
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(4) Setting parameters
Linear type
In addition to the conventional settings for a separate detector (bit 1 of
parameter No. 1815 (Series 15, 16, and 18), bit 3 of parameter No. 1807
(Series 15), and if needed, FSSB), note the following parameters:
[Flexible feed gear]
Parameter Nos. 2084 and 2085 (Series 16 and 18) or Nos. 1977 and
1978 (Series 15-B)
[Flexible feed gear N/M]
= Detection unit of the detector (µm)/least input increment of the
controller (µm)
[Number of position pulses]
Parameter No. 2024 (Series 16 and 18) or No. 1891 (Series 15-B)
Number of position pulses = the amount of movement per motor
revolution (mm)/detection unit of the detector (mm)
* If the number of position pulses exceeds 32767 as a result of the
above calculation, set bit 0 of parameter No. 2000 (Series 16 and 18)
or No. 1804 (Series 15-B) to 1, and reduce the following parameter
values by a factor of 10:
Number of position pulses: No. 2024 (Series 16 and 18),
No. 1891 (Series 15-B)
Number of velocity pulses: No. 2023 (Series 16 and 18),
No. 1876 (Series 15-B)
This completes parameter setting. Turn the power off then back on.
If an invalid parameter setting alarm is then issued, check the following
parameters:
* Number of position pulses: No. 2024 (Series 16 and 18) or
No. 1891 (Series 15-B) > 13100
If the above formula is satisfied, modify the parameter by referencing
supplementary 1 of Table 2.1.5.
(Example of parameter setting)
The Series 16 is used.
A linear scale with a minimum resolution of 0.1 µm is used.
The least input increment of the controller is 1 µm.
The amount of movement per motor revolution is 16 mm.
To enable a separate detector, set bit 1 of parameter No. 1815 to 1.
First, calculate the parameters for the flexible feed gear.
[Flexible feed gear] Parameter Nos. 2084 and 2085
[Flexible feed gear N/M]
= Detection unit of the detector (µm)/least input increment of the
controller (µm)
= 0.1 µm/1 µm = 1/10