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6. Setting Parameters
64
Festo P.BE-CMMP-CO-SW-EN 0708NH
The calculation of the
velocity_encoder_factor
uses the following equation:
Velocity_encoder_factor
=
numerator
=
gear_ratio x time_factor_v
divisor
feed_constant
The velocity_encoder_factor must not be greater than 2
24
.
Like the
position_factor
, the
velocity_encoder_factor
is also written into the motor
controller separated by numerator and denominator. It can therefore be necessary to
convert the fraction into whole numbers through suitable expansion.
EXAMPLE
First, the desired unit (column 1) and the desired decimal positions (DP)
must be determined along with the gear factor and, if applicable, the
feed constant of the application. This feed constant is then depicted in
the desired position units (column 2). Then the desired time unit is
converted into the time unit of the motor controller (column 3). Finally,
all values can be placed in the equation and the fraction calculated:
1.)
Desired unit at the drive-out (speed_units)
2.)
feed_constant: How many position_units are 1 revolution (R
OUT
)?
3.)
time_factor_v: Requested time unit per internal time unit
4.)
Gear factor (gear_ratio) R
IN
per R
OUT
5.)
Insert values into equation
1.
2.
3.
4. 5.
RESULT
Abbreviated
R/min
0 DP
R
/
min
1
R
OUT
=
1
R
OUT
1
min
1
=
4096
min
4096
1
1/1
min
U
4096min
U
min
1
4096min
1
1
4096
U
U
U
U
1
1
1
4096
1
1
num:4096
4096
div:1
1
R/min
2 DP
1/100
R
/
min
(
R
/
100 min
)
1
R
OUT
=
100
U
/
100
1
min
1
=
4096
min
4096
1
2/3
100min
U
4096min
U
min
1
4096min
1
300
8192
U
U
U
100
U
1
100
1
4096
3
2
num:2048
2048
div:75
75
°/s
1 DP
1/10
°
/
s
1
R
OUT
=
3600
°
/
10
1
s
1
=
1/1
10s
10
U
U
U
3600
245760
4096min
U
min
1
4096min
1
1
3600
1
4096
60
1
1
num:1024
div:15
Содержание CMMP Series
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