C H A N GE PARA METERS
6 5
C ALIBRA TIO N 3
EN C O DER S C ALIN G 4
EN C O DER S C ALIN G 4
1 3)EN C O DER SIG N
EN C O DER S C ALIN G 4
1 0)Q U A DRA T URE EN A BLE
EN C O DER S C ALIN G 4
1 1)EN C O DER LINES
EN C O DER S C ALIN G 4
1 2)M O T/EN C SPD RA TIO
R
R
R
R
R
the user must prov
i
de some externa
l
cond
i
t
i
on
i
ng c
i
rcu
i
try. The output format may be pu
l
se on
l
y for s
i
ng
l
e
d
i
rect
i
on, pu
l
se w
i
th s
i
gn, or phase quadrature. See 6.1.1 0 C ALIBRA TIO N / EN C O DER S C ALIN G.
There
i
s an encoder fa
il
ure detect
i
on system that may be conf
i
gured to e
i
ther tr
i
p the dr
i
ve, or automat
i
ca
ll
y
s w
i
tch to A V F. See 8.1.1 M O T OR DRIV E AL ARMS / Speed feedback m
3
)
ENCODE
R
+ A
R
M VO
L
TS
. In th
i
s mode the A V F prov
i
des the ma
i
n dynam
i
c feedback, and the
encoder feedback
i
s used to tr
i
m the accuracy to an extreme
l
y h
i
gh
l
eve
l
.
Note. Lo w frequenc
i
es g
i
ve poor performance. The
l
o w er frequency
li
m
i
t of reasonab
l
e performance w
i
th
encoder + A V feedback
i
s a 1 0 0 %
i
nput frequency of 2 Khz ( e. g. 6 0
li
nes at 2 0 0 0 rpm s
i
ng
l
e pu
l
se tra
i
n or
3 0
li
nes at 2 0 0 0 rpm for a quadrature encoder). W
i
th more
li
nes the performance
i
mproves, w
i
th
l
ess the
dynam
i
c stab
ili
ty degrades, part
i
cu
l
ar
l
y at
l
o w speeds.
In th
i
s mode, w hen us
i
ng a non quadrature s
i
ng
l
e
li
ne encoder, the feedback s
i
gn
i
s automat
i
ca
ll
y prov
i
ded by
the A V F and T 1 6 d
i
g
i
ta
l
i
nput
i
s made free for other uses. (Un
l
ess zero speed
l
ock
i
s requ
i
red. See 6.1 0.9
ZERO IN TERLO C KS / SPINDLE ORIEN T A TE. In th
i
s case T 1 6
i
s st
ill
requ
i
red for the encoder d
i
rect
i
on).
The f
i
na
l
steady state 1 0 0 % speed feedback RPM
i
s determ
i
ned from 6)DESIRED M A X RPM. The dynam
i
c
sca
li
ng
i
s der
i
ved from 1 8)RA TED ARM V OLTS. These 2 fu
ll
sca
l
e sett
i
ngs must correspond w
i
th each other
for opt
i
mum performance.
A V F feedback usua
ll
y conta
i
ns r
i
pp
l
e, hence
i
t
i
s adv
i
sab
l
e to reduce the SPEED C O N TROL
l
oop ga
i
ns w
i
th
A V F feedback se
l
ected. See 6.7.4 SPEED C O N TROL / Speed proport
There
i
s an encoder fa
il
ure detect
i
on system that may be conf
i
gured to e
i
ther tr
i
p the dr
i
ve, or automat
i
ca
ll
y
s w
i
tch to A V F. See 8.1.1 M O T OR DRIV E AL ARMS / Speed feedback m
4
)
ENCODE
R
+ TACHO
. In th
i
s mode the tachogenerator prov
i
des the ma
i
n dynam
i
c feedback, and the
encoder tr
i
ms the accuracy to an extreme
l
y h
i
gh
l
eve
l
.
Note. Lo w frequenc
i
es g
i
ve poor performance. The
li
m
i
t of reasonab
l
e performance w
i
th encoder + tacho
feedback
i
s prov
i
ded w
i
th a fu
ll
speed
i
nput frequency of 2 Khz (6 0
li
nes at 2 0 0 0 rpm s
i
ng
l
e pu
l
se tra
i
n or 3 0
li
nes at 2 0 0 0 rpm for quadrature encoder). W
i
th more
li
nes the performance
i
mproves, w
i
th
l
ess the dynam
i
c
stab
ili
ty degrades, part
i
cu
l
ar
l
y at
l
o w speeds.
In th
i
s mode, w hen us
i
ng a non quadrature s
i
ng
l
e
li
ne encoder, the feedback s
i
gn
i
s automat
i
ca
ll
y
prov
i
ded by the tacho and T 1 6 d
i
g
i
ta
l
i
nput
i
s made free for other uses. (Un
l
ess zero speed
l
ock
i
s requ
i
red.
See 6.1 0.9 ZERO IN TERLO C KS / SPINDLE ORIEN T A TE In th
i
s case T 1 6
i
s st
ill
requ
i
red for d
i
rect
i
on.)
A n encoder and/or tacho fa
il
ure detect
i
on system may be conf
i
gured to e
i
ther tr
i
p the dr
i
ve, or automat
i
ca
ll
y
s w
i
tch to A V F. See 8.1.1 M O T OR DRIV E AL ARMS / Speed feedback m
The f
i
na
l
steady state 1 0 0 % speed feedback RPM
i
s determ
i
ned from 6)DESIRED M A X RPM. The dynam
i
c
sca
li
ng
i
s der
i
ved from 8)M A X T A C H O V OLTS. These 2 fu
ll
sca
l
e sett
i
ngs must correspond.
6.1.1 0 C ALIBRA TIO N / EN C O DER S C ALIN G
The EN C O DER S C ALIN G screen
i
s the entry po
i
nt
to a further sub-menu w h
i
ch performs the process
of sett
i
ng the encoder parameters.
Note. See 7.1.9 SPEED LO OP M O NIT OR / Encoder
RPM mon
tor PIN 1 3 2 w h
i
ch sho w s the encoder
RPM
i
rrespect
i
ve of w hether the encoder
i
s be
i
ng
used for feedback or not.
Note. W
i
th no encoder f
i
tted you may
i
gnore th
i
s
sub-menu.
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