
B-65270EN/05 2. SETTING αiS/αiF/βiS SERIES SERVO PARAMETERS
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(Example of parameter setting)
[System configuration]
• The Series 16i 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.
[Parameter setting]
• To enable a separate detector, set bit 1 of parameter No. 1815 to
1.
• Calculate the parameters for the flexible feed gear.
Because flexible feed gear (N/M) = 0.1 µm/1 µm = 1/10:
No. 2084 = 1 and No. 2085 = 10
• Calculate the number of position pulses.
Number of position pulses = 16 mm/0.0001mm = 160000
Because this result does not fall in the setting range (0 to 32767),
set A and B, respectively, with the "number of position pulses"
and "position pulses conversion coefficient" by assuming:
160,000 = 10,000 × 16 → A = 10,000 and B = 16
No.2024 = 10,000, No.2185 = 16
(b) Parameter setting for analog output type linear encoder +
FANUC high-resolution serial output circuit
(Parameter setting method)
In addition to the conventional separate detector settings (bit 1 of
parameter No. 1815 (Series15
i, 30i,16i,18i,21i,20i, 0i, and Power
Mate
i), bit 3 of parameter No. 1807 (Series 15i), and, if necessary,
FSSB setting), pay attention to the following parameter settings.
First check the type of the FANUC high-resolution output circuit to be
coupled to the linear encoder, and then determine the settings of the
following function bits.
[Function bit]
Circuit Specification
Interpolation
magnification
High-resolution serial output circuit A860-0333-T501 512
High-resolution serial output circuit H A860-0333-T701 2048
High-resolution serial output circuit C A860-0333-T801 2048