Fagor CNC 8060 - Page 103

Installation manual
CNC 8060
CNC 8065
MACHINE PARAMETERS.
2.
(REF: 1402)
·103·
Machine parameters for the axes and spindles.
FBMIXTIME
Time constant for combined (mixed) feedback.
Parameter valid for linear and rotary axes and spindles.
Parameter valid for a Sercos drive.
Possible values: From 0 to 3200.0 ms.
Default value: 0.
Associated variable: (V.)[ch].MPA.FBMIXTIME.xn
Parameter included in the SERCOSDATA table.
This parameter may be used to set the time constant to be used when combining feedbacks;
i.e. it sets the delay between the coordinates entered in the position loop of the rotary encoder
and that of the linear encoder. The CNC takes this parameter into account only when using
external or external+internal feedback.
If the parameter is set to a value other than ·0·, the combined feedback is enabled; if set to
·0·, only the external feedback is enabled. When changing this parameter, the parameter
validation will force resetting, initializing, the Sercos ring.
On machines that have a lot of backlash and use external feedback to obtain greater accuracy
may suffer some instability. This kind of machines, with internal feedback, run smoothly, but
they may loose accuracy; using external feedback on the other hand, the machine is more
accurate but it may run more abruptly. The combination of the two feedbacks achieves the
desired result of accuracy and smoothness.
The CNC uses the combined feedback to calculate the velocity command, but it uses the
external (direct) feedback to calculate the compensations, circularity test, etc.
CONFIGURING A MECHATROLINK DRIVE.
MLINKDATA
Data of the Mechatrolink drive.
Parameter valid for linear and rotary axes and spindles.
Parameter valid for a Mechatrolink drive.
This parameter shows the table to define the communication with the Mechatrolink drive.
DRIVEID
Drive address.
Parameter valid for linear and rotary axes and spindles.
Parameter valid for a Mechatrolink drive.
Possible values: From 1 to 14 (Mlink-I) / From 1 to 30 (Mlink-II).
Default value: 1.
Associated variable: (V.)[ch].MPA.DRIVEID.xn
Parameter included in the MLINKDATA table.
This parameter indicates the position (node) occupied by the drive in the Mechatrolink bus.
The drives must occupy consecutive positions starting at ·1·. Although the relationship
between the node number and the logic number of the axis or spindle is irrelevant, for clarity
sake we recommend to configure the nodes in the same order the axes and spindles are
defined at the CNC.
This parameter requires a drive version V6.13 or newer.
i
MLINKDATA
DRIVEID Drive select.
OPMODEP Main operating mode of the drive.
OPTION Activate the drive options.