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Motor Control
• Increase the value by 5 starting with the default value for motors
with very small or no flywheels.
• Reduce the value by 5 starting with the default value for motors
with large flywheels.
Test again and repeat this procedure until you arrive at the desired
result.
11.1.2.3. Reference Voltage
In CV 53, you set the EMF reference voltage generated by the
motor at maximum revs. This parameter may have to be adapted
subject to the track voltage and the efficiency of the motor.
If the locomotive reaches maximum speed when the throttle is
set to about three-quarter and the top third of the throttle has
no influence on the speed, then you should reduce the value of
CV 53. Reduce the value by 5 – 8 and test the locomotive again.
Repeat this process until the locomotive just reaches its maximum
speed when the throttle is fully open.
Type of motor
Fleischmann® round motor
Märklin® SFCM small «Scheibenkollektormotor» with magnet 51961
Märklin® SFCM big «Scheibenkollektormotor» with magnet 51960
Märklin® DCM «Trommelkollektormotor»
Märklin® 5*-high-performance motor
Märklin® Locomotives with Maxon Motor
HAG® motors
Trix® Locomotives with Maxon Motor
Faulhaber® motors
Piko® Motor
40
Remarks
with magnet 51962
Remove the motor EMC capacitors from the main board! 3
Figure 18: Chart of BACK-EMF settings for widely used motors
11.1.2.4. Parameter "K slow"
Together with the LokSound V4.0 decoder an additional CV 52
has been introduced which seperately determines the gain control
considerably for the whole slow driving sector in speed step 1.
If you are not satisfied with the driving behaviour when the lo-
comotive drives slowly or starts, while everthing is fine with the
medium and high speed steps, you should increase the value of
CV 52 by ca. 5 - 10 than the value set in CV 54.
11.1.2.5 Adaptive Regulation Frequency
The decoder operates ex works with a mutable (adaptive) regula-
tion frequency to drive the motor as precisely as possible. However,
as a result some motors might show a nasty buzzing noise.
For such motors you are able to set the regulation frequency on a
constant value. Set bit 4 to "1" in CV 124.
CV 2
CV 52
4
32
4
30
4
30
4
30
3
32
3
16
4
15
16
4
32
3
20
CV 53
CV 54
CV 55
CV 56
120
80
50
255
50
40
175
200
50
40
175
200
50
40
175
200
120
60
95
255
140
48
20
255
100
40
175
200
140
48
20
255
140
80
50
255
80
30
30
255
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