Bill
Looks like you have both "innie" and "outie" wonks that would be an
indication that all movement is going on right there not spread out
along the rails/tracks. It looks like there is too much movement
concentrated there - perhaps measurable in an eighth of an inch, which
is too large for one joint gap of course.
First I assume you have the modules bolted together securely with lag
bolts so next problem is to let the rails float to a degree.
Ah and then there is the fact you are using the very robust AM track
which doesn't flex much and whose spikes grip the rails unlike Shinohara
for example, so all the elongation is transmitted along the rails to the
ends. However, the rails in the picture look solidly fastened to the
ties and modules -- are these the traveling modules with old solidly
seated (long since ballasted) rails?
So it may be in problem areas a couple sections of good old Shinohara
will be needed -- see next thought.
Second proposition would be to try to spread the expansion/contraction
back each way over several feet of track by making the next joint or two
for a couple feet away moveable.
In other words the expansion at the table joint first pushes that track
joint together and then pushes back against the next and so on.
Unfortunately when whatever condition is causing the expansion reverses,
you may have to fiddle with some of the gaps to "reset" them.
Third proposition would be to drop as many feeder wires as you need for
power continuity with these moveable/imperfect conductors and make sure
the feeders flex some.
Cheers,
Chris
[email protected]
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