Connecting modules

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Re: Connecting modules

Postby MacG » Mon Feb 20, 2017 1:47 pm

An another variant are T-Nuts.
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Re: Connecting modules

Postby ConnRiver » Tue Feb 21, 2017 2:46 pm

Drilling the threads out of T-nuts, good idea. Thanks for posting that.
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Re: Connecting modules

Postby railtwister » Tue Mar 07, 2017 7:29 pm

The pattern maker pins are indeed a cool product, but the maker overseas wants nothing to do with the American market for fear of being hauled into court due to our product liability laws ( I know, it sounds silly, but that was the case as explained a few years ago when the posted video first came out). Perhaps one of our members in the U.K. Would be willing to arrange a purchase and then forward them to us here in the USA...

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Re: Connecting modules

Postby ConducTTor » Tue Mar 07, 2017 10:32 pm

Wow that's kind of lame (on our part). I know Kuhn never sold his models here for the same reason.
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Re: Connecting modules

Postby Richard-B » Wed Mar 08, 2017 8:54 pm

ConnRiver wrote:Drilling the threads out of T-nuts, good idea.
This is what I have been using; Cheap, available, reliable, and good-enough alignment.

On my TT-Track sections:
TT-Tracks_section_RB.jpg
T-nuts on TT-track on TT-nut...
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Re: Connecting modules

Postby ConnRiver » Thu Mar 09, 2017 6:59 pm

Richard-B wrote:
ConnRiver wrote:Drilling the threads out of T-nuts, good idea.
This is what I have been using; Cheap, available, reliable, and good-enough alignment.

On my TT-Track sections:
TT-Tracks_section_RB.jpg


Drilling out the T-Nuts and then using threaded bolts? Long smooth bolts with only a short length of thread might work? . . . IOW, what are you using for alignment pins?

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Re: Connecting modules

Postby TinGoat » Fri Mar 10, 2017 11:50 am

Hey Gang,

ConnRiver wrote:Drilling out the T-Nuts and then using threaded bolts? Long smooth bolts with only a short length of thread might work? . . . IOW, what are you using for alignment pins?

Brian C.
Cedar Rapids, Iowa / USA


Why not do both?

This will give you alignment AND make it easy to thread the nuts and bolts together...

T-Nuts are a great way to go.

From experience, it can be a PITA to get the bolts to start threading into nuts. Cross threading is a real hobgoblin.

If you use a longer bolt and file the threads off the first 3/4" of the end, then you can slip the bolt into the nut nice and straight and then start turning without having any crossed threads.

Use an even longer bolt and you can add a wingnut for easy finger tightening...

Having the Blind T-nuts on one end of the module and the "sighted" T-nuts on the other will work for N-Track style modules with a front and rear.

For Free-Mo style modules that can be turned end-for-end you have to put a Blind and Sighted T-nut at each Interface Plate as shown in the diagram.

Bolt2.gif
Bolt2.gif (13.29 KiB) Viewed 196 times
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Re: Connecting modules

Postby Richard-B » Fri Mar 10, 2017 12:17 pm

Ron

Thanks for the thorough job of documenting T-nut use...

Since I'm usually dealing with sections that only go together one way (i.e. NOT modular), I didn't install the T-nuts as an opposite facing pair; my current ones both go the same way.

I may go ahead and blunt some threads on the end of the bolts per your suggestion... for now I've just been careful about not cross-threading.

With this arrangement... most modules (up to about 24in wide) need no additional locator pins...
assuming the end panels are robust enough to hold the T-nuts in good alignment. If using 3mm (1/8 in) ply... it should be laminated to double-up the thickness at least where the T-nuts mount... and preferably for the entire end.
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Re: Connecting modules

Postby TinGoat » Fri Mar 10, 2017 12:38 pm

Hi Richard,

Thanks.

I would never use anything less than 1/2" thick for Interface Plates.

I've added this to my blog: http://humbervalleysimcoerailway.blogspot.ca/2017/03/modular-persuits.html
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Re: Connecting modules

Postby Bernd » Wed Jun 07, 2017 3:04 pm

I came across a post on FB today from Railroad Model Craftsman. Ron Klaiss is building a sort of modular layout. To join the sections together he uses "table pins" to align the modular sections. I found several suppliers. One source is Amazon. https://www.amazon.com/Hafele-America-Table-Pins-10/dp/B003FHOQ6O He uses 2 part epoxy to fasten the table pins in place. May be something to look into.

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