
Title 90A3 / 90A7 / 90B3 / 90B7
Learning Control Operator’s Manual
03 ’01.01.13 K.Maeda 3
rd
. updated. Draw No.
02 '03.01.06 K.Maeda 2
nd
. updated
A - 63639E - 070
01 ’00.09.20 K.Maeda Newly designed Sheet 049
Edit Date Design Description / 081
7.3 Ultra high precision velocity feedback function (Rotary axis)
7.3.1 Summary
In 90A7 or 90B7 series, Ultra high precision velocity feedback ( Abbreviation : separate semi-closed )
function can be realized by using the absolute rotary encoder RCN723F or RCN223F (2
23
resolution) made
by Heiden-Hain.
This function combined with Learning function enables the rotary axis to achieve the high precision, which
has a good achievement on the C axis direct driven by the motor with the encoder close attached to it
.
(Note) This function is NC option. Refer to “Appendix 1. Notes of order”.
(Note) The incremental encoder RON××× type can’t use for this function.
7.3.2 Cable connection method
7.3.3 Parameter setting
The following setting is the example for 90B7 series. In case of 90A7 series, refer into a parenthesis.
RCN723F or RCN223F are applied as 7,200,000 pulse / revolution because of 2
23
resolution.
• N1815#1=0 Semi-closed system
• N1820=4 CMR=2 ( Setting unit 0.0001 degree)
• N1821=900,000 (7,200,000) Reference counter
• N2000#0=1 0.1 micron
• N2019#2=1 Ultra high precision velocity feedback function
• N2023=6554 (819) PLUCO
• N2024=10000 (1250) PPLS
• N2084=72 SDMR1
• N2085=80 SDMR2
• N2138=-3 (0) AMR expansion
• N2229#0=1 for absolute encoder
7.3.4 Pole position detection function (Option)
After the encoder is connected with a motor, Pole position detection function has to be executed once in order
to make C phase signal from encoder. The result value is stored to N2139. If N2139 is reset to zero, Pole
position detection function has to be executed again. Refer to following document concerning how to operate
this function.
"FANUC Series 16i / 18i / 21i -MA /TA Pole Position Detection Function Specifications" A-77769E
CNC
i -series
AMP
SVM
JF
FSSB
Motor
RCN723F