The further towards to top (the turnout throwbar) you set the fulcrum, the
smaller the movement; the more towards the motor, the more movement. You
adjust it to where it hold the points against the stock rails but without
deforming the turnout itself.
in article email@example.com, larry l. at
firstname.lastname@example.org wrote on 10/3/03 6:47 AM:
email@example.com (larry l.) wrote:
Changing the fulcrum does two things:
1) Changes the amount of throw (distance)
2) Changes the force of the throw.
They're inversely porportional - the further "up" you move the fulcrum,
the less distance the point end moves, but the more force it has. Move the
fulcrum "down", and the point end doesn't move as far, but exerts more
force. The wire _does_ mediate this to some extent as it flexes.
However, the amount of force (in most all applications) is sufficient for
the job, so basically you can move the fulcrum to fine-tune how far the
points move... particularly in smaller scales, where you don't want to
exert excessive force on the points. Set the movement to be just enough to
close the points firmly, and all should be well.
"What it all comes to is that the whole structure of space flight as it stands
now is creaking, obsolecent, over-elaborate, decaying. The field is static; no,
On Fri, 03 Oct 2003 15:42:05 GMT, firstname.lastname@example.org (Joe Ellis)
The fulcrum really comes in to play in the larger gauges where you
have to substitute a heavier wire to operate the switch blades. This
wire is not as flexible as the wire supplied with the Tortoise and the
fulcrum allows you to fine tune the range of movement so that the
motor doesn't strain too much at the extremities of its throw.
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