HEIDENHAIN ND 281 B v.1 - Manual (Page 25)

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Parameter Settings/ Function
P40 COMP. Select encoder compensation
No compensation
COMP. OFF
Nonlinear: up to 64 compensation points for
linear encoders, up to 72 for angle encoders
(fixed spacing of 5 deg.)
NONL. COMP
Linear compensation COMP. ON 1)
P41 L.COMP. Linear error compensation 1) –
99 999.9 < P41 < + 99 999.9 [µm/m]
Default setting: 0
Example: Find input value for P41
Displayed measuring length ............. L
a
= 620.000 mm
Actual length (measured, e.g.
with the VM 101 comparator
system from HEIDENHAIN) .............. L
t
= 619.877 mm
Length difference .............................
∆
L = L
t
– L
a
= – 123 µm
Compensation factor k (= P41):
k =
∆
L / L
a
= – 123 µm / 0.62 m ........ k = – 198.4 [µm/m]
P43 REF Reference marks
One reference mark
SINGLE REF.
Distance-coded with 500 • SP
(SP: signal period)
500 SP
Distance-coded with 1000 • SP
(e.g. for HEIDENHAIN LS ...C)
1000 SP
Distance-coded with 2000 • SP 2000 SP
Distance-coded with 5000 • SP 5000 SP
Parameter Settings/ Function
P30 DIR Counting direction
Positive counting direction with
positive direction of traverse
DIRECT. POS
Negative counting direction with
positive direction of traverse
DIRECT. NEG
P31 S. PER. Signal period 1) of encoder
0.000 000 01 < P31 < 99 999.9999
Default setting: 10 µm
P33 COUNT Counting mode 1)
0-1-2-3-4-5-6-7-8-9 COUNT 0-1
0-2-4-6-8 COUNT 0-2
0-5 COUNT 0-5
P36 SP/R Signal periods per revolution 2)
1 < P36 < 999 999
Default setting: 36 000
P37 COUNT. Counting mode 2)
0-1-2-3-4-5-6-7-8-9 COUNT 0-1
0-2-4-6-8 COUNT 0-2
0-5 COUNT 0-5
P38 DP POS Decimal places 3)
1 / 2 / 3 / 4 / 5 / 6
(up to 8 for inch display)
List of Operating Parameters
1) Only in linear measurement mode.
2) Only in angular measurement mode.
3) Depends on signal period (P31) and measuring unit (P01)