Measuring System Adaptation For Axes And Spindles (As From Sw 4) - Siemens SINUMERIK 840C Installation Instructions Manual

09.95
5.2.4 Measuring system adaptation for axes and spindles
(as from SW 4)
Explanation This function is used to automatically calculate the position control resolution and
measuring system resolution (optimization of the closed position control loop).
You will find the function under the softkey path Machine data/NC MD/Axis (or
Spindle) measuring system data. After you have entered the parameters (see
table below), move to the NC machine data Pulses var. incremental weighting
(Axis: NC MD 3640/Spindle NC MD: 4550) or Traversing path var. incremental
weighting (Axis: NC MD 3680/Spindle: NC MD 4560) and trigger calculation by
pressing the toggle key.
Notes If the data do not correspond, a number sign "#" is displayed next to the machine
data "Pulses var. incremental weighting" and "Traversing path var. incremental
weighting". As soon as the values have been calculated a tick "n" is displayed.
Machine data f: Pulse multiplication EXE/611D/HMS (Axis: NC MD
11160/Spindle: NC-MD 4580) should be matched in such a way that the condition
measuring system resolution < position control resolution is given.
Parameter table This table lists the parameters for the measuring system adaptation.
Parameter
Position control
resolution
Pulse multiplication
EXE/611D/HMS
Grating constant
Spindle pitch
Measuring system reso-
lution
Pulses per revolution
Gear factor
Number of revolutions
on load site
Number of revolutions
on motor side
Pulses variable
incremental weighting
Traversing path variable
incremental weighting
Note Machine data 39000–39120 and 24210–24220 are used for internal calculations
only.
Measuring system resolution (axis) : m +
Formulas used
for calculation
Measuring system resolution (spindle) : m +
Ratio :
Gearbox factor : r + r1
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SINUMERIK 840C (IA)

5.2.4 Measuring system adaptation for axes and spindles (as from SW 4)

Symbol NC-MD
axis/spindle
b 18000.0–3/5240.0–3 Internal computational resolution of control
f 11160/4580
g 39120/–
l 39120/–
m –
p 39080/24220
r –
r1 39000/24200
r2 39040/24210
u 3640/4550
v 3680/4560
Measuring system resolution
Position control resolution
r2
5 Machine Data Dialog (MDD – as from SW 3)
Meaning
Multiplier input
Distance between marks on a linear scale
Leadscrew pitch
Maximum resolution of measuring system-
The value is used as the basis
Number of encoder pulses per revolution
Speed ratio between number of revolutions
on load side (r1) and number of revolutions
on motor side (r2)
Actual speed of axis or spindle
Actual speed of motor for axis or spindle
Position control resolution weighting
Measuring system resolution weighting
r x l
4 x p x f
r x g
or m +
4 x p x f
r x 360 degr.
4 x p x f
å m + v u
b
5–15