
B-65270EN/05 4.SERVO FUNCTION DETAILS
- 279 -
[Small motors] (pole-to-pole span: 30mm)
FFG(No.2084/No.2085)
Signal pitch
PLC0
(2000#0)
Number of velocity pulses /
Number of position pulses,
Conversion coefficient
(No.2023 / No.2024, 2185)
AMR conversion
coefficient 1 or 2
(No.2112, 2138)
1-µm detection
0.1-µm
detection
20 0 5000 / 16000, 0 1500, 9 5 / 128 50 / 128
40 0 2500 / 8000, 0 750, 9 5 / 64 50 / 64
2 1 5000 / 8000, 2 15000, 9 1 / 256 10 / 256
4 1 2500 / 8000, 0 7500, 9 1 / 128 10 / 128
40.513167 0 2468 / 7899, 0 1481, 8 301 / 3804 3010 / 3804
* The parameter Nos. for the Series 15i are omitted. See the
previous page.
Table 4.14.1 (e) Parameter setting when an absolute type linear encoder is used
[Medium-size and large motors] (pole-to-pole span: 60mm)
FFG(No.2084/No.2085)
Resolution
PLC0
(2000#0)
Number of velocity pulses /
Number of position pulses,
Conversion coefficient
(No.2023 / No.2024, 2185)
AMR conversion
coefficient 1 or 2
(No.2112, 2138)
1-µm detection
0.1-µm
detection
0.1 0 1953 / 6250, 0 9375, 6 1/10 1/1
0.05 0 3906 / 12500, 0 9375, 7 1/20 1/2
[Small motors] (pole-to-pole span: 30mm)
FFG(No.2084/No.2085)
Resolution
PLC0
(2000#0)
Number of velocity pulses /
Number of position pulses,
Conversion coefficient
(No.2023 / No.2024, 2185)
AMR conversion
coefficient 1 or 2
(No.2112, 2138)
1-µm detection
0.1-µm
detection
0.1 0 1953 / 6250, 0 9375, 5 1/10 1/1
0.05 0 3906 / 12500, 0 9375, 6 1/20 1/2
* The parameter Nos. for the Series 15i are omitted. See the
previous page.
(Cautions)
If the encoder signal pitch is larger than 200 µm, various coefficients
used in the servo software may overflow to raise an alarm on invalid
parameters, because the setting for the number of velocity pulses
becomes very small.
In this case, change the corresponding parameter by referencing
Subsection 2.1.8, "Measures for Alarms on Illegal Servo Parameter
Settings."
Parameter setting procedure (3)
When a linear motor is used, the linear encoder must be installed so
that the Z phase of the linear encoder matches the origin of the
activating phase. Otherwise, the specified motor characteristics cannot
be obtained. (For details of installation positions, refer to "FANUC
LINEAR MOTOR Lis series DESCRIPTIONS (B-65382EN)".)
Procedure (3) describes the method of adjusting the activating phase
origin (AMR offset adjustment) when it is difficult to install a linear
encoder at a specified position with a specified precision.