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Old 09-02-2018, 12:28 PM   #1
WilsonB
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Default Hornby H poor running

Hi

I have fitted a DCC concepts Zen nano decoder to my new H class. It runs reasonably well on a rolling road (although not as well as before I fitted the chip) but barely runs at all on my track. Other locos work well, so I don't think it is the track.

Any thoughts as to what I might have done to mess this up?

Wilson
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Old 09-02-2018, 12:31 PM   #2
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Did you fully run in the loco before fitting the chip?
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Old 09-02-2018, 12:43 PM   #3
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also could you try another decoder perhaps
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Old 09-02-2018, 12:54 PM   #4
Shroomy
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Quote:
Originally Posted by WilsonB View Post
Hi

I have fitted a DCC concepts Zen nano decoder to my new H class. It runs reasonably well on a rolling road (although not as well as before I fitted the chip) but barely runs at all on my track. Other locos work well, so I don't think it is the track.

Any thoughts as to what I might have done to mess this up?

Wilson
First thing strip of body then dig out all the gunk around the worm gear they have been packing it solid with white grease
When you've down that give it a proper lubrication shouldn't be anything wrong with the zen
Also check the plate that covers the worm gear and slacken the screws of just a bit

If it is still slowing down then speeding up the choice is yours either return to whom you've got it from or get Hornby to send you a new motor
A little vid might help you
https://youtu.be/drj4BmpH65k
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Old 09-02-2018, 01:17 PM   #5
Steve M
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More likely to be dirty as in slightly tarnished, wheels and pickups. Clean those properly first and run it in properly - 30 mins in each direction - on DC.
If it’s still a poor runner return it without stripping it down as this may cause a problem with the warranty.
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Old 09-02-2018, 02:31 PM   #6
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@Wilson......the Zen decoder has a comprehensive set of CVs that can be adjusted for best running of any particular loco........for example, CV2, Start Volts, is set low as default but you may well benefit by increasing this CV to cure your loco's sluggish performance......details here..... https://www.dccconcepts.com/manual/b...-zen-decoders/ .......HB
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Old 10-02-2018, 07:40 AM   #7
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Thank you all.

I ran it in well on DC and set the CVs on the rolling road so they should be OK. The track and wheels have been cleaned but no harm doing that again.

I think I will take another look inside in case I have trapped something then try running the chassis on its own, with the decoder and if necessary with the blanking piece. If that doesn't work I guess I will return it to Hornby.

Once again thanks for the advice.

Wilson
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Old 10-02-2018, 08:20 AM   #8
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My H runs beautifully on my DC layout.
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Old 10-02-2018, 10:45 AM   #9
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Try a different decoder. - I had a DCC fitted Bachmann loco that kangarooed along the layout, changed the decoder and it runs fine. If it ran okay on dc then sending it back is not going to achieve anything. When you say it ran ok on dc was that on track or just on the rolling road ? Locos that run ok on dead straights may not necessarily be ok on curves / unstraight track if the pick ups are not aligned correctly - that's the first thing I check if a new loco is problematic.

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Old 10-02-2018, 03:24 PM   #10
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I think it is a decoder issue.
Unfortunately I can't try it on my layout because it is purely DCC, but the chassis runs nicely on the rolling road on analogue DC. On DCC the motor often appears to stall on startup, but once running it seems to be fine.
So I will reset the decoder to its defaults and start again. But any furthe rhelpful advice on this particular problem and decoder would be most welcome
Incidentally there is a suppression capacitor fitted to the motor. Could this be the issue? From all my reading opinion seems to eb divided on whether to remove them for DCC or not!

Wilson
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