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Working points indicator


Taigatrommel

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I've got a mild obsession about correct signalling, and this small detail is strictly a part of that. It's probably obvious, but these little objects indicate a point's position. I made a simple crank from rod and scrap etch, working out the throw distance from the tiebar's movement. I didn't get it quite right first time! The cosmetic details are Auhagen, and happily are ready painted- I do not have steady hands. They also have the lever for hand thrown points, but I'm not even going to try and make that move. I drilled a hole in the bottom of the indicator to take the rod, and in the baseboard a short length of tube holds the rod in place and allows it to turn freely.

 

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I would be interested to know how you calculated the crank and lever throw lengths - it irritates me that I do not have working point indicators on my line, which is otherwise correctly signalled, any information would be very helpful. I work in 0e, by the way.

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Working from the tiebar's length of movement as the distance of a 90 degree arc, so in this case 2mm.

 

Length=[angle x (pi/180)] x radius(ie crank lenth)

 

2=90 x 0.0175 x radius

 

2 = 1.575 x radius

 

2/1.575 = radius

 

1.27 = radius/crank length

 

Edit:  I go to the pub and realise that I grossly overcomplicated things, and to cap it all off that gives you an incorrect answer.  Triangles are a better way to work.  In this case, it's a right angled triangle, so the square root of half the square of the hypoteneuse gives you the crank length.

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Oh, very useful. I have a pack of the same Auhagen ones and was wondering how to make them operational.

 

Cheers chap!

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Indeed! I have the H0 ones, but the set-up looks very much the same. Will have a play.

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