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WH
Thanks for that. I didn't realise there was a voltage threshold for the microprocessor. Is this a programmable CV value?

I take your point about spur gears. I'm a member of the 3mm Society and one of our group has done some interesting work in this field. I have a motor bogie fitted with these and an N20 300 rpm motor. It needs one of the idlers changing for a larger size (12 tooth instead of 11 tooth) but otherwise it seems to work OK. Geoff has built some good chassis using the kits he has put together. Use crown and pinion instead of bevel gears though, bevel gears are really hard to get to mesh properly and are very sensitive to side play.
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AHJAY
No, the processors are active components and literally dead or "Off" unless adequate voltage is present.  The turn on voltage for the processor is an absolute physical spec of the microprocessor... without that minimum level it simply will not work and no CV can change that..

Yes, spur and bevel gears need to form part of an integrated gearbox unit to hold them in proper alignment - which is really why Mfrs like worms. Easy to build with no real accuracy needed!

regards, Ahjay.:-) :-)
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WH
Zen chips with keep alives have arrived. I won't have time for a few days to try them out but when I do I will post results
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Thegreenhowards
Well I’ve tried a few more tests following the advice above. I can still not make the DCC Concepts large 
stay alives work with DCC Concepts chips (I’m mainly using Zen 360) . However, I have found they work well with other manufacturers chips, so I must be doing something wrong. The problem may be that the loco starts from zero speed again as soon as it loses power (e.g. on an insulfrog), so the stay-alive can’t prevent a major stutter. Sometimes the loco stalls completely. These tests have been done with a Hornby J50 which runs perfectly on DC, but the perfect running on DC may be due to the (old fashioned) brass flywheel. Other locos exhibit the same problem of restarting the speed from zero, but I haven’t done such extensive tests with them.

Is there a cv I can change on the decoder to eliminate this problem?

andy
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AHJAY
Apart from DC running set to off (changing CV29 accordingly), there is no setting for stay alive.

There was a software change quite some time back that modified how they ran with stay alives. It will therefore depend on the software version.

Email j.gay@dccconcepts.com and discuss. If necessary we will swap a decoder for you.

kind regards, Ahjay
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Jaz Avalley JazAvalley

JMW wrote:
Old loco motor magnets tend to demagnetize. Some 10 years after I stopped modelling with Hornby Dublo, I was asked to make a re-magnetizer. If people are interested, I will explain further.

even though i do not need it, it sounds most interesting, and i for one would be keen for you to explain.

Jaz Avalley

Model Railway Discussion Group

https://www.facebook.com/groups/495282280644117/
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