Fagor CNC 8060, Installation Manual, Page: 557 / 698

Installation manual.
CNC 8060
CNC 8065
CON
F
IGUR
ING AN AXIS.
11.
Co
nfi
gure two axes as a ta
ndem axis.
·557·
(R
EF
: 1709)
11.2.3 Tandem axis configuration. Block diagram.
The block diagram of the tandem control system shows the master tandem axis with its slave
tandem axis. The block diagram for a gantry machine consists of two identical diagrams to
the one shown in the figure.
The block diagram has an area for the drive and another one for the CNC that comprises
the position loop and the control of the tandem.
Position and velocity loop.
The position loop is closed only with the position of the master axis of the tandem. The velocity
command of the tandem master axis is also sent to the tandem slave axis closing the velocity
loop.
The tandem control changes the velocity command of the master axis and that of the slave
axis according to the torque distribution and the selected preload.
The feed-forward and AC-forward values of the master axis are applied to the slave axis;
consequently, they must have the same gear ratios.