Example - Non-equidistant bilateral SSFK

The diagram below shows a compensation value table with the properties:

Non-equidistant interpolation points (kw.ssfk.interval = 0)
Bilateral compensation table (kw.ssfk.bilateral = 1)
Position specifications in metric system (kw.ssfk.unit = 1)
Compensation value table with 140 entries (kw.ssfk.kw_nr_max = 140). The index of the position and setpoint entries goes from 0 to 139.

The following values were measured at the third gauged position (table[3]):

Programmed Position s_soll,i ith setpoint	pos measurement value s_ist,i ith actual value (pos direction)	neg measurement value s_ist,i ith actual value (neg direction)	computed pos compensation value Δs_i = s_ist,i – s_soll,i	Computed neg compensation value Δs_i = s_ist,i –s_soll,i
19866.7 µm	19856.5 µm	19874.7 µm	-102 x 0.1 µm	80 x 0.1 µm

Programing Example

Non-equidistant bilateral SSFK

kopf.achs_nr 2

kopf.log_achs_name Y AXIS

kw.ssfk.interval 0

kw.ssfk.kw_startpos -200000

kw.ssfk.kw_nr_max 140

kw.ssfk.unit 1

kw.ssfk.bilateral 1

kw.ssfk.table[0].setpoint -200000

kw.ssfk.table[1].setpoint -199306

kw.ssfk.table[2].setpoint -198667

kw.ssfk.table[3].setpoint -198001

...

kw.ssfk.table[138].setpoint 334488

kw.ssfk.table[139].setpoint 335591

kw.ssfk.table[0].pos 0

kw.ssfk.table[1].pos 24

kw.ssfk.table[2].pos -102

...

kw.ssfk.table[139].pos -55

kw.ssfk.table[0].neg 0

kw.ssfk.table[1].neg 67

kw.ssfk.table[2].neg 80

...

kw.ssfk.table[139].neg 114