
2. SETTING αiS/αiF/βiS SERIES SERVO PARAMETERS B-65270EN/05
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(d) RCN220, RCN223, RCN723, and RCN727 manufactured by Heidenhain
Minimum resolution
(Note 1)
Model Backup
HEIDENHAIN 2
20
pulse/rev
2
23
pulse/rev
2
27
pulse/rev
RCN220
RCN223, 723
RCN727
Not required
Not required
Not required
NOTE
1 The minimum resolution of a rotary encoder is the resolution of the
encoder itself.
For the FANUC systems, however:
One million pulses/rev for a minimum resolution of 2
20
pulses/rev
Eight million pulses/rev for a minimum resolution of 2
23
pulses/rev
Eight million pulses/rev for a minimum resolution of 2
27
pulses/rev
(4) Setting parameters
Set the following parameters according to the type of the detector
(described in the previous item).
(a) Parameter setting for a linear encoder of a serial output type
(Parameter setting method)
In addition to the conventional settings for a separate detector (bit 1 of
parameter No. 1815 (Series30
i,15i,16i,18i,21i,20i, 0i, and Power Mate
i), bit 3 of parameter No. 1807 (Series 15i), and if needed, FSSB),
note the following parameters:
[Flexible feed gear]
Parameter Nos. 1977 and 1978 (Series 15i) or Nos. 2084 and 2085
(Series 30
i, 16i and so on)
Flexible feed gear (N/M)
= minimum resolution of detector [µm] / controller detection unit
[µm]
[Number of position pulses]
Parameter No. 1891 (Series 15i) or No. 2024 (Series 30i, 16i and so
on)
Number of position pulses
= Amount of movement per motor revolution [mm] /
detection unit of the sensor [mm]
* If the result of the above calculation does not fall in the setting
range (0 to 32767) for the number of position pulses, use
“position feedback pulse conversion coefficient” to specify the
number of position pulses according to the following procedure.
Number of position pulses to be set = A × B
Select B so that A is within 32767. Then, set the following:
A: Position pulses parameter (32767 or less)
No.1891 (Series15
i), No.2024 (Series 30i, 16i and so on)
B: Position pulses conversion coefficient parameter
No.2628 (Series15
i), No.2185 (Series 30i, 16i and so on)