Stainz 20212 Going slowly on the track - Voltage drop

Gavin Sowry

Garden Railroader and Raconteur
27 Oct 2009
6,785
2,184
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Hutt Valley, NZ
Why do I feel that you just haven't got enough grunt in your power supply?

And, in those photos, have you actually got the motor 'upside down'..... the worm and the gear don't look like they mesh.
 

Gavin Sowry

Garden Railroader and Raconteur
27 Oct 2009
6,785
2,184
67
Hutt Valley, NZ
You had me believing it too until I took a more careful look! If you follow the worm tooth around the motor rotor you'll see they do mesh!
Yep, got it now. An optical delusion. One of the troubles coming, as I do, from the 'other' side of the Equator, is that I can get things upside down.... like the sun (that's that yellow orb in the sky, in case you've forgotten) that shines from the south when in the Northern Hemisphere, which on more than one occasion had me heading west when I wanted to go east. Well, at least most of you drive on the correct side of the road, which is not the right side of the road.
 

wandgrudd

Registered
24 Oct 2009
390
51
....
Has it got a smoke unit, what happens if you run it with the smoke disconnected?
 
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3 minutes of fame

3d printing, electronics and trams
14 Dec 2020
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Lincolnshire
www.mgnr.uk
Might be worth reassembling the gearbox and motion but without the motor and check it runs freely. As P phils2um says, it could be quartering or it could simply be misalignment.

If it runs freely - and I mean the slightest push will get the wheels moving, try it with the motor. It may be that the motor needs tweaking slightly on the mounts so it runs without binding on the gears.

My approach is always to think what might have caused the issue in the first place. Has it been run on carpet, so its picked up fibres and gummed up the mechanism, has someone tried to push it along and damaged the gear train, has it been dropped, causing some damage to the gearbox or twisting the chassis? If you can work out what might have caused the problem, fixing it is usually easier.
 

Greg Elmassian

Registered
8 Mar 2014
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San Diego
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So I read the loco running is about an amp (is that on it's back?)
the motor alone is 0.13 amp, what is expected.

So if it draws almost 10 times more with the gears in mesh, it points to excessive friction somewhere.

Can you verify that the "almost an amp" is with the loco on it's back, drivetrain engaged? If you have not made this measurement, I ask that you do.

Greg
 

LGB333

Active Member
Any recommendations on a tutorial video on disassembly and testing a motor? Also any recommendation on where to source a new motor in the US?
Hi AKWeber84 - Most of us LGB Internet Dealers in the USA sell the LGB Buhler short shaft or long shaft motors for a similar price $59. You can email me if you need one: OldDominionRailways@gmail.com
McLean VA
Tom