Re: Modelling stub switches

Posted by Todd A Ferguson on Sep 04, 2015; 6:43pm
URL: http://c-sng-discussion-forum.254.s1.nabble.com/Modelling-stub-switches-tp2408p3379.html

Jeff,

You may want to take a look at the new Rapido switch motors as they are designed to rotate the switch stand flag.

Might be and easier way to go if you want the targets to turn....

Best,

Todd Ferguson

Harrisburg, NC

Sent from my Wacked and Cracked iPad III, OUCH!!!

On Sep 4, 2015, at 1:37 PM, Jeff Young [via C&Sn3 Discussion Forum] <[hidden email]> wrote:

Having discovered that the 0.025" piano wire supplied with Tortoises is in no way able to throw a non-hinged switch, I've had to put the switch on the back-burner while I await larger piano wire.

So I went on to the switch stand.  I'm using C&S Elliot stands that Rick Steele cast for me:



Getting the target to rotate in HOn3 scale is a tricky business.  First off, there must be almost no slop in the holes you drill in the switch stand.  0.026" holes for 0.025" rod work well, 0.028" holes not so well.  (You will have to file off any burrs/elongation from the end of the rod to get it through a 0.026" hole.)

The crank offset is also critical.  With a 1.6mm offset I wasn't getting much rotation of the target rod, while a 1.3mm offset gave me binding issues.  1.4mm gives me nearly 90° rotation of the target, so we'll have to call that good enough.







Cheers,
Jeff.

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