
2. SETTING α SERIES SERVO PARAMETERS B-65150E/04
− 26 −
Rotary 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] = (Amount of table movement (degrees)
per detector revolution)/(detection unit
(degrees))/1,000,000
[Number of position pulses] Parameter No. 2024 (Series 16 and 18)
or No. 1891 (Series 15-B)
Number of position pulses = 12500 × motor-to-table deceleration
ratio or acceleration ratio
This completes setting. Turn power off then back on.
(Example of parameter setting)
The Series 16 is used.
The least input increment of the controller is 1/1000 degree.
The amount of movement per motor revolution is 180 degrees
(deceleration ratio: 1/2)
Table-to-separate-encoder deceleration ratio = 1/1
To enable the separate detector, set bit 1 of parameter No. 1815 to 1.
NOTE
* When multiplication by the deceleration ratio reduces
the number of position pulses, resulting in the
issuance of an invalid parameter setting alarm, modify
parameter setting as follows:
Set bit 4 of parameter No. 2000 to 1 (Series 16 and
18), or bit 4 of parameter No. 1804 to 1 (Series 15-B).
* When multiplication by the acceleration ratio
increases the number of position pulses (32767 or
more), resulting in the issuance of an invalid
parameter setting alarm, modify parameter settings as
follows:
Set bit 0 of parameter No. 2000 to 1 (Series 16 and
18), or bit 0 of parameter No. 1804 to 1 (Series 15-B).
Reduce the number of position pulses in parameter
No. 2024 (Series 16 and 18) or No. 1891 (Series 15-
B) by a factor of 10.
Reduce the number of velocity pulses in parameter
No. 2023 (Series 16 and 18) or No. 1876 (Series 15-
B) by a factor of 10.