Manual

4. Parametrizing blocks
4−5
Festo P.BE−SFC−DC−PB−S7−EN en 0604NH
4.1.3 Conver ting the measuring units
In the SFC−DC all parameters are always saved in increment
specifications (inc, inc/s, inc/s
2
). Conversion is carried out via
the parameters:
 Feed constant, depending on the drive
 Gear reduction
 Encoder resolution = physical measuring steps per motor
revolution. With the SFC−DC: pulse quadruplication by
digital interpolation.
Parameters
SLTE−10 SLTE−16
feed Feed constant
1)
SLTE−...−BS5.0: 5000 [m/rev] SLTE−...−LS7.5: 7500 [m/rev]
gear Gear ratio
2)
SLTE−...−G04 (57:13)
enc Encoder resolution
3)
512 x 4 = 2048 [incr/rev] 1000 x 4 = 4000 [incr/rev]
1) D
epending on drive, here type SLTE−...
2)
Specification in 2 natural numbers for counter or denominator of the fraction
3)
With the SFC−DC: pulse quadruplication by digital interpolation
Tab.4/1: Basis parameter for the measuring system
The values for specifying the positions in m are saved in the
SFC−DC and can be downloaded (PN U 1004, subindex 0 and 1).
Special conversion factors for the SFC−DC
Length unit SLTE−10 SLTE−16
Increments > millimetres Increments / 1795.938 Increments / 2338.461
Millimetre > increments Millimetres * 1795.938 Millimetres * 2338.461
Increments > inch Increments / 45616.836 Increments / 59396.923
Inch > increments Inch * 45616.836 Inch * 59396.923
Tab.4/2: Conversion factors for SLTE measuring system