Fagor CNC 8060, Installation Manual

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Installation manual.
CNC 8060
CNC 8065
MACHINE PA
RAMETERS.
2.
Gen
e
ral machin
e parameters.
·67·
(R
EF
: 1709)
2.3.3 Configuration of a tandem system.
TANDEM
Table of tandem axes or spindles.
This parameter shows the table to define the tandem pairs of the system. A tandem axis
consists of two electric motors mechanically coupled to each other forming a single
transmission system (axis or spindle).
The following aspects may be pointed out in this configuration:
• A tandem axis helps provide the necessary torque to move a servo drive system when
a single motor is not capable of supplying enough torque to do it.
• Applying a pre-load torque between the main motor and the slave motor reduces the
backlash.
Requirements of the tandem systems
Each tandem pair (master and slave) must meet the following requirements:
• Each master tandem axis (spindle) admits one single slave tandem axis (spindle).
• A preload may be applied between the two motors.
• Each motor may have a different rated torque.
• The turning direction of each motor may be different from the other's.
• The torque distribution between both motors may be different from 1:1 ratio. For example,
on motors whose rated torque is different.
• Both axes and drives must be of the same type (same AXISTYPE and DRIVETYPE
parameters for both axes).
• The channel changing permission (parameter AXISEXCH) must be the same in both
axes.
• Both axes and drives must have the same software limits (same LIMIT+ and LIMIT-
parameters for both axes).
• When the axes are rotary, both axes must be of the same type (same AXISMODE and
SHORTESTWAY parameters for both axes).
• The fast and slow home search speeds (parameters REFFEED1 and REFFEED2) must
be the same for both axes.
TANDEM n
Configuration of each tandem pair.
This parameter shows the parameter table to define the tandem pairs of the system. Each
tandem pair has the following machine parameters to configure it.
Managing tandem spindles and axes requires a drive version V6.14 or newer.
i
Example of a tandem axis made up of two pinions and a rack.
TANDEM
MASTERAXIS Tandem pair. Master or main axis/spindle.
SLAVEAXIS Tandem pair. Slave axis/spindle.
TORQDIST Tandem pair. Torque distribution.
Master axis Slave axis
Pinion Pinion
Rack