Programmable SyncPos motion controller
MG.10.J8.02 – VLT is a registered Danfoss trade mark
192
Example 2: Conveyor belt
The input should be possible in 1/10 mm resolution.
The drive is connected to the conveyor belt with a
gearing of 25:11; this means that the motor makes
25 revolutions and the drive pulley 11.
Gear factor = 25/11
Incremental encoder directly on the master drive;
encoder resolution = 4096
The drive pulley has 20 teeth/revolution, 2 teeth
correspond to 10 mm; thus, 1 revolution = 100 mm
conveyor belt feed.
Thus, the scaling factor is 1000
Set the following parameters in order to work with 1/
10 degree division
SYNCFACTM
= 2048
SYNCFACTS
= 55
Example 3: Calculation of the scaling factor for a
friction drive
Assume that the output is equipped with a friction
wheel (radius 60 mm); we want to work with a
resolution of 1/10 mm:
One revolution on the output is thus calculated as
follows:
Scaling factor = 2
Π
r * 10 = 2
Π
* 60 * 10 = 3969,91
Scaling factor = 3970
Since an error will occur in any case due to the
rounding, a marker adjustment must be performed
after each full revolution.
Parameter Reference
50
SYNCFACTS
The synchronization is described with a ratio of qc
(Master : Slave); SYNCFACTS determines the syn-
chronization factor for the slave.
SYNCFACTM (49) and SYNCFACTS (50) make the
compensation of different drive factors possible or
the adaptation of the slave speed in relation to the
master speed set.
In conjunction with CAM synchronization the
parameters SYNCFACTM and SYNCFACTS are used
to transform qc into MU units. This allows the user to
work with meaningful units in the CAM-Editor. See
example 2 below.
See prerequisites of the formula and example
under SYNCFACTM (49).
Content
Synchronization factor slave (M:S)
or in CAM mode conversion qc in MU units
Parameter Group
Axis parameter Synchronization AXS
CAM-Editor: index card Synchron.
Unit
q c
Value range
1 … 2 * MLONG/max. master velocity
★
1
where by
max. master velocity unit is in QC/PROFTIME(29)
Example
See SYNCFACTM (49)
