Festo Контроллер двигателя SFC-ST - Manual (Page 59)

4. Parametrizing blocks
4−5
Festo P.BE−SFC−DC−PB−S7−E N en 0604NH
4.1.3 Converting 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:
ć Feed constant, depending on the drive
ć Gear reduction
ć 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 [Ģm/rev] SLTE−...−LS7.5: 7500 [Ģm/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 Ģm are saved in the
SFC−DC and can be downloaded (PNU 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