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Offline DamonKelly  
#1 Posted : 11 November 2006 14:35:01(UTC)
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DamonKelly

Australia   
Joined: 26/03/2006(UTC)
Posts: 1,421
Location: Brisbane, QLD
I have a spare Delta decoder (PN 670040 from 33184 -- 3 pole DCM). I just converted it to digital with a ESU LokSound mfx.

I want to use this decoder in an older SFCM loco -- is the Delta decoder specific for a particular motor type, or can I fit it to an older SFCM?

Thanks.
Cheers,
Damon
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Offline RayF  
#2 Posted : 11 November 2006 15:27:04(UTC)
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RayF

Gibraltar   
Joined: 14/03/2005(UTC)
Posts: 15,839
Location: Gibraltar, Europe
Delta decoders work with all AC motor types. There should be no difference in the way it works with either SFCM or DCM (or LFCM for that matter).

Try it and see. What have you got to lose?

Ray
Ray
Mostly Marklin.Selection of different eras and European railways
Small C track layout, control by MS2, 100+ trains but run 4-5 at a time.
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Offline DamonKelly  
#3 Posted : 12 November 2006 12:32:05(UTC)
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DamonKelly

Australia   
Joined: 26/03/2006(UTC)
Posts: 1,421
Location: Brisbane, QLD
Quote:
[size=1" face="Verdana" id="quote]quote:Originally posted by RayPayas
Try it and see. What have you got to lose?


Only the smoke inside the IC's on the decoder! wink

Do the Delta decoders work with permanent magnet motors with the 5 pole rotors?
I have all the bits to convert my old locos to 5 pole/permanent magnet, but not the decoders. I will "trickle-down" the older decoders (like the Delta under discussion) until I have fitted all my olders ones with new decoders.
Cheers,
Damon
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Offline RayF  
#4 Posted : 12 November 2006 14:26:59(UTC)
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RayF

Gibraltar   
Joined: 14/03/2005(UTC)
Posts: 15,839
Location: Gibraltar, Europe
I did see a diagram somewhere showing how to connect a delta decoder for a DC motor, but I can't remember where.

I would say, save your new motor bits until you buy your new decoders and use the old ac motors with the delta decoders...

Or...get some cheap lokpilots (~25€) for your new motors.

Ray
Ray
Mostly Marklin.Selection of different eras and European railways
Small C track layout, control by MS2, 100+ trains but run 4-5 at a time.
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Offline jorge_vilarrubi  
#5 Posted : 12 November 2006 16:18:48(UTC)
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jorge_vilarrubi


Joined: 15/12/2003(UTC)
Posts: 655
Location: Buenos Aires,
A Delta decoder is a Mot. decoder with only 15 addresses available.
Most Delta decoders are designed for AC motors.
However, some Delta Loks have a DC motor driven by a spececific Delta DC decoder, such as BR55 (part #205956).
AC Deltas are suitable for any AC motor (with the exception of very old Loks, such as 3015 Krokodil).
DC Deltas are more specific and not every decoder will fit every motor.
Basic rule should be: if you have unisntalled a Delta from an AC-motor Lok, you can install it on another AC-motor Lok.
For DC-motor Loks, just try and see how it works.
Regards,
Jorge Vilarrubí
Buenos Aires
ARGENTINA
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Offline H0  
#6 Posted : 13 November 2006 19:30:01(UTC)
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H0


Joined: 16/02/2004(UTC)
Posts: 15,267
Location: DE-NW
Quote:
[size=1" face="Verdana" id="quote]quote:Originally posted by jorge_vilarrubi
<br />A Delta decoder is a Mot. decoder with only 15 addresses available.

The chip can handle 80 addresses, but only few Delta decoders have 8 address switches, therefore it requires some tricky soldering to get beyond the 15 addresses (and I think a Delta decoder isn't worth it).

It can be used for DC motors with some extra transistors (but I think a Delta decoder isn't worth it).
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
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Offline Rowan  
#7 Posted : 13 November 2006 21:06:39(UTC)
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Rowan


Joined: 09/04/2006(UTC)
Posts: 1,278
Location: Brisbane, Queensland

Only the smoke inside the IC's on the decoder!

biggrin
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Offline Hemmerich  
#8 Posted : 13 November 2006 21:20:05(UTC)
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Hemmerich


Joined: 15/04/2003(UTC)
Posts: 2,734
Location: ,
Quote:
[size=1" face="Verdana" id="quote]quote:Originally posted by DamonKelly
Do the Delta decoders work with permanent magnet motors with the 5 pole rotors?


No! You'll have to modify the decoder.

There exist some webpages which describe this; as well the extension to 80 adresses and switchable function outputs.
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