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Offline marklinist5999  
#1 Posted : 21 April 2021 14:46:03(UTC)
marklinist5999

United States   
Joined: 10/02/2021(UTC)
Posts: 493
Location: Michigan, Troy
Hi, my former dealer installed one in my 3511 back in the late 90's or early 2000's. It runs well, slight low buzz at low speed, goes away with higher speeds. I don't run her that much. I read on here by webmasterCrying that a c90 decoder will fry a Faulhaber motor. Is this deocder one?
Thank's in advance.
Offline river6109  
#2 Posted : 21 April 2021 15:01:50(UTC)
river6109

Australia   
Joined: 22/01/2009(UTC)
Posts: 13,527
Location: On 1965 Märklin Boulevard just around from Roco Square
no it will not, may be a little grease to the worm gear
https://www.youtube.com/river6109
https://www.youtube.com/6109river
5 years in Destruction mode
50 years in Repairing mode
Offline H0  
#3 Posted : 21 April 2021 15:07:38(UTC)
H0


Joined: 16/02/2004(UTC)
Posts: 14,121
Location: DE-NW
Märklin offered the 60905 decoder for the Faulhaber motors.
I don't know if the 60902 can be harmful to Faulhaber motors, but there must be some drawbacks, otherwise Märklin would not have made the 60905.
"c90" stands for the 6090 decoder.
Regards
Tom
---
"In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS
UserPostedImage
thanks 1 user liked this useful post by H0
Offline marklinist5999  
#4 Posted : 21 April 2021 15:14:15(UTC)
marklinist5999

United States   
Joined: 10/02/2021(UTC)
Posts: 493
Location: Michigan, Troy
Ok, thanks Tom! Dave was very good with electronics. If the 60905 had been out yet, he'd have put one in it. He was a former TV-hi-fi repair specialist. He added hobbies when solid state eliminated much of his business. He used an Intellibox back then, etc.
Offline JohnjeanB  
#5 Posted : 21 April 2021 15:23:43(UTC)
JohnjeanB

France   
Joined: 04/02/2011(UTC)
Posts: 1,518
Location: Paris, France
Hi
"I read on here by webmasterCrying that a c90 decoder will fry a Faulhaber motor. Is this deocder one?
Thank's in advance."
I made a try long time ago on the 3611 I have. You will not fry it but the speed curve will be "disappointing" (no slow speed).
This is because the rotor coils have no iron core so a totally unusual inductance value. This is a Glockeankermotor. The best there is but needs an adapted drive decoder.
A mLD3 or mSD3 (with Sound- 60975 for steam sounds) will allow to enter the motor type (CV52 = 4 for Bell armature / Glockenanker)

Then you can run the auto calibration using CV7
You must have selected the proper motor type beforehand
You must install the loco on a large diameter loop (it will go full speed for a moment)
Then write 77 into CV7
The loco will start slowly and faster possibly start and stop
After a while the auto calibration is finished
Cheers
Jean
My layout videos
latest vid
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thanks 1 user liked this useful post by JohnjeanB
Offline marklinist5999  
#6 Posted : 21 April 2021 15:51:47(UTC)
marklinist5999

United States   
Joined: 10/02/2021(UTC)
Posts: 493
Location: Michigan, Troy
BigGrin
Originally Posted by: JohnjeanB Go to Quoted Post
Hi
"I read on here by webmasterCrying that a c90 decoder will fry a Faulhaber motor. Is this deocder one?
Thank's in advance."
I made a try long time ago on the 3611 I have. You will not fry it but the speed curve will be "disappointing" (no slow speed).
This is because the rotor coils have no iron core so a totally unusual inductance value. This is a Glockeankermotor. The best there is but needs an adapted drive decoder.
A mLD3 or mSD3 (with Sound- 60975 for steam sounds) will allow to enter the motor type (CV52 = 4 for Bell armature / Glockenanker)

Then you can run the auto calibration using CV7
You must have selected the proper motor type beforehand
You must install the loco on a large diameter loop (it will go full speed for a moment)
Then write 77 into CV7
The loco will start slowly and faster possibly start and stop
After a while the auto calibration is finished
Cheers
Jean
He must have added a diode or resistor or something then, because I have great slow speed. I'll have a look beneath the decoder.

Offline marklinist5999  
#7 Posted : 21 April 2021 17:54:42(UTC)
marklinist5999

United States   
Joined: 10/02/2021(UTC)
Posts: 493
Location: Michigan, Troy
Originally Posted by: marklinist5999 Go to Quoted Post
BigGrin
Originally Posted by: JohnjeanB Go to Quoted Post
Hi
"I read on here by webmasterCrying that a c90 decoder will fry a Faulhaber motor. Is this deocder one?
Thank's in advance."
I made a try long time ago on the 3611 I have. You will not fry it but the speed curve will be "disappointing" (no slow speed).
This is because the rotor coils have no iron core so a totally unusual inductance value. This is a Glockeankermotor. The best there is but needs an adapted drive decoder.
A mLD3 or mSD3 (with Sound- 60975 for steam sounds) will allow to enter the motor type (CV52 = 4 for Bell armature / Glockenanker)

Then you can run the auto calibration using CV7
You must have selected the proper motor type beforehand
You must install the loco on a large diameter loop (it will go full speed for a moment)
Then write 77 into CV7
The loco will start slowly and faster possibly start and stop
After a while the auto calibration is finished
Cheers
Jean
He must have added a diode or resistor or something then, because I have great slow speed. I'll have a look beneath the decoder.

It creeps smoothly on speed step 1 on the CS3, towing 4 cars. There is a small board not original with only a single black/yellow/orange resistor under the decoder. Not sure if it's only for the led's.

Offline Webmaster  
#8 Posted : 21 April 2021 18:41:38(UTC)
Webmaster


Joined: 25/07/2001(UTC)
Posts: 11,084
A standard old 6090 will eventually fry the Faulhaber motor, due to its low frequency pulse rate on the motor drive that makes the motor coil basket rattle & vibrate more than healthy.
The 60902 is not a 6090. It is newer... Smile

There was eg 3711 Wuerttenberg C (and 37112 "Olympia") that was announced as 6090, but it had a special board with rectifiers and no EMF feedback for load control.

One of the first decoders that could have a higher frequency motor output was the LokPilot/Loksound decoder that could be set to 20KHz (or something like that) frequency for the motor feed.

The mfx decoders from M do have a high frequency motor output, as well as many other also have. The mSD versions are easily programmable too, as JohnJeanB says.
Juhan - "Webmaster", at your service...
He who asks a question is a fool for five minutes. He who does not ask a question remains a fool forever. [Old Chinese Proverb]
thanks 2 users liked this useful post by Webmaster
Offline marklinist5999  
#9 Posted : 21 April 2021 21:01:33(UTC)
marklinist5999

United States   
Joined: 10/02/2021(UTC)
Posts: 493
Location: Michigan, Troy
BigGrin
Originally Posted by: Webmaster Go to Quoted Post
A standard old 6090 will eventually fry the Faulhaber motor, due to its low frequency pulse rate on the motor drive that makes the motor coil basket rattle & vibrate more than healthy.
The 60902 is not a 6090. It is newer... Smile

There was eg 3711 Wuerttenberg C (and 37112 "Olympia") that was announced as 6090, but it had a special board with rectifiers and no EMF feedback for load control.

One of the first decoders that could have a higher frequency motor output was the LokPilot/Loksound decoder that could be set to 20KHz (or something like that) frequency for the motor feed.

The mfx decoders from M do have a high frequency motor output, as well as many other also have. The mSD versions are easily programmable too, as JohnJeanB says.

Thank you Johan! I wish my old dealer hadn't reired and closed. He was also knowledgable. I have a 37537 br 120 from 2004, with an 8 pin plug in decoder. No part number, no dip switches. It runs excellent, but the only sound function, a far distant low volume horn or whistle, and volume is not adjustable with a control unit. I'm curious if there is a plug in newer decoder with more sounds that can plug in without gutting the led board it plugs into. that part is 225 205. The speaker is a large round frame mounted 508 607.

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