Fagor CNC 8060, Installation Manual

Page: 241 / 698

Installation manual.
CNC 8060
CNC 8065
MACHINE PA
RAMETERS.
2.
Mac
h
ine parameters for
the
axes. Work sets.
·241·
(R
EF
: 1709)
2.6.26 Delay estimate at the drive.
AXDELAY
Parameter value at the drive.
Parameter valid for linear and rotary axes and spindles.
Parameter valid for analog drive, Sercos and simulated.
Possible values: Standard / From 0 to 127 cycles.
Default value: Standard.
Associated variable: (V.)[ch].MPA.AXDELAY[set].xn
Parameter AXDELAY is an estimate of the drive's delay when applying the velocity command
sent by the CNC. The CNC uses this parameter to compensate for the delay difference
between the axes of a channel so the command reaches all the axes at the same time and
the movement of the axes starts and ends at the same time. Depending on the delay set,
the CNC calculates how far in advance it must send the velocity command to the drive.
The CNC also takes this delay into account when calculating the anticipation time
(ADVINPOS mark), in thread repair and when calculating the braking distance for the probe.
2.6.27 Correction of bus and drive delay.
TRANSDELAY
Correction of the delay inserted by the bus and the drive.
Parameter valid for linear and rotary axes.
Parameter valid for analog drives, velocity-Sercos drives and simulated drives.
Possible values: From 0 to 4*LOOPTIME µs.
Default value: 0.
Associated variable: (V.)[ch].MPA.TRANSDELAY[set].xn
The TRANSDELAY parameter enables the bus and drive delay to be compensated.
• Analog axes (feedback through Can). About 2.5 sampling periods.
• Velocity Sercos axes. About 1.2 sampling periods.
• Position-Sercos axes Not used.
This parameter affects the adjustment of the ACFWFACTOR and ACFGAIN and may be
used to obtain better results in speed variations with less following error (axis lag).
Peculiarities of the laser model.
On laster machines with gap control, the TRANSDELAY parameter of the axis associated
with the sensor must have a value of 0 (zero) in order for the machine response to be the
same with and without gap control. The compensation for the delays is implemented through
the ACFWFACTOR parameter, which will have a higher value than if the TRANSDELAY
parameter is applied (approximately the sum of TRANSDELAY and ACFWFACTOR in an
analog or Sercos speed adjustment). In an adjustment without the TRANSDELAY
parameter, the following error peaks in accelerations and stops will be greater than with an
adjustment using this parameter.
AXDELAY Meaning.
Standard. F o r F a g o r d r i v e s , t h a t d o n o t r e q u i r e a n y d e l a y
compensation.
0. The CNC does not apply delay compensation at the drive.
1 to 127. Delay cycles at the drive. The CNC automatically
compensates for the delay differences between the axes of
the channel.