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morsing		#1 Posted : 06 September 2014 17:35:45(UTC) Retweet
Joined: 16/08/2014(UTC) Posts: 586 Location: Aylesbury, Buckinghamshire		Hi, I'm finally up and running, almost can't believe it! 15 days to get hold of a connector box! Anyway, I have a derailing problem... I'm pulling Marklin carriages with a Roco loco, but between both the carriage and the loco and front carriage it frequently derails by the buffers getting on top of each other if there is a tiny straight stretch between curver. Say I come out of a curve and there is a 077 then a point, and this happens. Even the little straight bit on the curved R1 points cause this problem. Is there something that need adjusting? Thanks in advance.
		----- Modelling west Denmark era IV - possibly with some out-of-place elements! Marklin C-track + CS3+ 12m2 layout to be controlled by RocRail
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H0		#2 Posted : 06 September 2014 19:26:17(UTC) Retweet
Joined: 16/02/2004(UTC) Posts: 15,265 Location: DE-NW		Hi! Maybe you just have to get rid of the Märklin couplers and get some NEM compatible couplers. Märklin couplers are too high for scale models. See also: http://blog.mailez.de/eblog/?p=65
		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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morsing		#3 Posted : 06 September 2014 22:51:45(UTC) Retweet
Joined: 16/08/2014(UTC) Posts: 586 Location: Aylesbury, Buckinghamshire		Originally Posted by: H0 Hi! Maybe you just have to get rid of the Märklin couplers and get some NEM compatible couplers. Märklin couplers are too high for scale models. See also: http://blog.mailez.de/eblog/?p=65 Hi, Looking at that blog, my Roco loco already has Maerklin like couplers...
		----- Modelling west Denmark era IV - possibly with some out-of-place elements! Marklin C-track + CS3+ 12m2 layout to be controlled by RocRail
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H0		#4 Posted : 06 September 2014 23:10:10(UTC) Retweet
Joined: 16/02/2004(UTC) Posts: 15,265 Location: DE-NW		Originally Posted by: morsing Looking at that blog, my Roco loco already has Maerklin like couplers... A Märklin coupler on the Märklin coach next to the loco can still be a problem because it is too high - and the buffers on the Roco loco are lower than buffers on Märklin locos.
		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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mike c		#5 Posted : 07 September 2014 03:34:45(UTC) Retweet
Joined: 28/11/2007(UTC) Posts: 7,892 Location: Montreal, QC		It is possible that a Maerklin type 7203 coupling on a Roco coach or locomotive can contact the underside of the buffer in curves. You can avoid this by either using a hook only coupler on the locomotive or by replacing the Maerklin coupler with Roco's universal coupling. The reason for this is that the Roco Universal coupler is about 1mm longer than the Maerklin one, which allows it to avoid snagging the buffer. The other possibility is to use regular hook couplings for the locomotive and for the end of the coach next to the locomotive. Regards Mike C
1 user liked this useful post by mike c		Danlake
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H0		#6 Posted : 07 September 2014 07:36:42(UTC) Retweet
Joined: 16/02/2004(UTC) Posts: 15,265 Location: DE-NW		Originally Posted by: mike c The reason for this is that the Roco Universal coupler is about 1mm longer than the Maerklin one According to Reiner Lüssi's site, the difference is only 0.1 mm. IMHO length doesn't matter here, but Roco Universal coupler saves about 2 mm in height.
		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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Goofy		#7 Posted : 07 September 2014 08:29:53(UTC) Retweet
Joined: 12/08/2006(UTC) Posts: 9,017		It seems Roco universal coupler wins.
		H0 DCC = Digital Command Control
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H0		#8 Posted : 07 September 2014 09:37:59(UTC) Retweet
Joined: 16/02/2004(UTC) Posts: 15,265 Location: DE-NW		Originally Posted by: mike c The reason for this is that the Roco Universal coupler is about 1mm longer than the Maerklin one Roco also make height-adjustable Universal couplers which are really longer. They can be used when longer couplers are needed. They are not normally needed, but may help if the NEM pocket of loco and/or coach are not at the correct position.
		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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RayF		#9 Posted : 07 September 2014 10:00:36(UTC) Retweet
Joined: 14/03/2005(UTC) Posts: 15,839 Location: Gibraltar, Europe		Morsing, This has happened to me too with a Roco loco. The Roco locos don't always handle Marklin couplers well. As Tom has said, the buffers are mounted lower than on Marklin locos. I had a few Roco standard couplers available from Roco wagons which I had fitted with Marklin close couplers. I fitted the first wagon or coach next to the Roco engine with one of the Roco couplers and this stopped the derailing.
		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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morsing		#10 Posted : 07 September 2014 11:17:51(UTC) Retweet
Joined: 16/08/2014(UTC) Posts: 586 Location: Aylesbury, Buckinghamshire		Hi, The buffers are exactly the same height as far as I can tell. I found the "problem" anyway. The buffers on the Maerklin coaches have two positions, short and long. I pushed the buffers on the coach hooking onto the loco to the short position and that fixed it! I've even reversed through points and S-curves at fairly high speed without problems. Photo below shows what happens when they're on the long setting:
		----- Modelling west Denmark era IV - possibly with some out-of-place elements! Marklin C-track + CS3+ 12m2 layout to be controlled by RocRail
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3 users liked this useful post by morsing		TrainIride, MikeR, petestra
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RayF		#11 Posted : 07 September 2014 18:16:26(UTC) Retweet
Joined: 14/03/2005(UTC) Posts: 15,839 Location: Gibraltar, Europe		Glad you found the problem! I'd forgotten about the two buffer positions. This did happen to me once with some new coaches and it took me a couple of days to figure out.
		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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TrainIride		#12 Posted : 07 September 2014 18:28:48(UTC) Retweet
Joined: 23/10/2010(UTC) Posts: 1,912 Location: FRANCE		Originally Posted by: RayF Glad you found the problem! I'd forgotten about the two buffer positions. This did happen to me once with some new coaches and it took me a couple of days to figure out. I had the same behavior with some SNCF corail coaches ... I did not know it was common to Märklin recent models. Thank you for the information Best Regards Joël
		Marklin HO - M track & C track - Analog mode - https://www.marklin-users.net/TrainIride - my channel : https://www.youtube.com/user/2mes2mains
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Goofy		#13 Posted : 07 September 2014 18:36:40(UTC) Retweet
Joined: 12/08/2006(UTC) Posts: 9,017		Originally Posted by: morsing I've even reversed through points and S-curves at fairly high speed without problems. Photo below shows what happens when they're on the long setting: What track curves(radii) do you use as S-curves?
		H0 DCC = Digital Command Control
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morsing		#14 Posted : 07 September 2014 20:24:07(UTC) Retweet
Joined: 16/08/2014(UTC) Posts: 586 Location: Aylesbury, Buckinghamshire		Originally Posted by: Goofy Originally Posted by: morsing I've even reversed through points and S-curves at fairly high speed without problems. Photo below shows what happens when they're on the long setting: What track curves(radii) do you use as S-curves? It's just an R2 with an R1 curved point then going into a normal point with a 24224.
		----- Modelling west Denmark era IV - possibly with some out-of-place elements! Marklin C-track + CS3+ 12m2 layout to be controlled by RocRail
		WWW
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Drongo		#15 Posted : 08 September 2014 05:19:34(UTC) Retweet
Joined: 03/06/2008(UTC) Posts: 1,224 Location: Sydney, NSW		Originally Posted by: morsing Hi, The buffers are exactly the same height as far as I can tell. I found the "problem" anyway. The buffers on the Maerklin coaches have two positions, short and long. I pushed the buffers on the coach hooking onto the loco to the short position and that fixed it! I've even reversed through points and S-curves at fairly high speed without problems. Photo below shows what happens when they're on the long setting: Do all Marklin coaches have the 2 position buffers, or is something special?
		Take it easy . . . . or any other way you can get it !!!!
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H0		#16 Posted : 08 September 2014 08:09:26(UTC) Retweet
Joined: 16/02/2004(UTC) Posts: 15,265 Location: DE-NW		Originally Posted by: youngagain Do all Marklin coaches have the 2 position buffers, or is something special? AFAIK all 27 cm and 1:100 coaches with close couplers have them. I think the "new longer length" (28.2 cm) coaches don't have them.
		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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