Fagor CNC 8055i, Installation Manual

Page: 223 / 732

Installation manual
CNC 8055
CNC 8055i
MA
CHINE PARA
METERS
6.
S
OFT
: V02.2
X
·223·
Ax
is parameters
3 Sercos axes and 1 Sercos spindle, the values of this parameter must be 1, 2, 3 and 4. Proceed
in the same way if it is a CAN connection.
EXTMULT (P57)
This parameter is to be used when utilizing a distance-coded feedback system. It indicates the ratio
between the mechanical period or the graduation pitch on the glass or steel tape and the electrical
period or period of the feedback signal supplied to the CNC.
Values to be assigned for Fagor encoders with distance-coded I0.
SMOTIME (P58)
Sometimes the axis does not respond as desired on particular movements. Movements with
handwheel or when the CNC internally transforms the programmed coordinates (C axis, RTCP, etc.).
In these cases, the axis response may be smoothed by applying a filter to speed variations. This
filter is set by parameter SMOTIME that indicates the duration of the filter in milliseconds, value given
by general parameter LOOPTIME (P72).
To obtain a better response, parameter SMOTIME of the axes interpolating with each other should
be set with the same value.
Example:
E.g. Fagor linear encoder "FOT" has a graduation pitch of 100 µm and a feedback signal period of 20 µm.
EXTMULT = 100 / 20 = 5
Linear encoders
I0CODI1
(P68)
I0CODI2
(P69)
EXTMULT
(P57)
S O P
SVOP GOP M OT
M O C
MOP C OT
C O C
COP FOP 1000 1001 1
S OX
SVOX GOX MOX COX FOT 1000 1001 5
MOY COY 1000 1001 10
LOP 2000 2001 1
LOX 2000 2001 10
FOX 1000 1001 25
Rotary encoder
I0CODI1
(P68)
I0CODI2
(P69)
EXTMULT
(P57)
HO SO 90000 pulses 1000 1001 5
HO SO 180000 pulses 1000 1001 10
HOP SOP 18000 pulses 1000 1001 1
EXTMULT (P57) =
Period of the graduation on the glass (mechanical period or pitch)
Period of the feedback signal (electrical period)
Possible values
Default value: 0
Possible values
Integers between 0 and 64 times the value assigned to general parameter LOOPTIME (P72).
If LOOPTIME = 0 (4 ms), the maximum value that could be assigned to SMOTIME will be 64 x 4 = 256 ms.
Default value: 0