Although I can't find any pics of your points, and therefore have no idea which type of system you have used to construct your points. I would say that your problem sounds like a classic case of your check rails being too tight. I don't know what type of roll gauges you use, and whether these are correct for your track. Do you use code 100, or code 75 rail, and are the roll gauges the correct ones for the rail you use ?
Your roll gauges should have check rail slots if they are to be useful, and these slots are set at slightly different positions for different sizes and thicknesses of rail !
The fact that wagons and coach bogies go through your points without problems, but not you 0-6-0 or 6 wheel rigid part of a locos chassis (your Prairie) implies that it is likely to be the check rails next to the frog that are too tight, as you said the locos "Jam". This being the classis indication of check rails simply being possibly only 0.5mm too tight.
To move the check rails next to the frog out slightly, will unfortunately disprupt the position at which the blade rails bend to form the check rails. The position of these bends will have to be moved slightly towards the tiebar, to allow the check rail part to also be moved out slightly to create a wider gap.
I have built hundreds of points in all scales from Z to O gauge. Some of my latest "OO" scale handbuilt points will be seen in my thread "Basingstoke in "OO" 1958-67" in the category "Modelling real locations". Run through that thread to find the pictures of these points before I ballasted them, which may help you visually to pinpoint your problem. You can always leave a further Post there if you have further questions and I'll try and help !
Two steps forwards and one back
in Chard Junction and Hatch (trial and error)
A blog by Vistisen in RMweb Blogs
Posted
Vistean,
Although I can't find any pics of your points, and therefore have no idea which type of system you have used to construct your points. I would say that your problem sounds like a classic case of your check rails being too tight. I don't know what type of roll gauges you use, and whether these are correct for your track. Do you use code 100, or code 75 rail, and are the roll gauges the correct ones for the rail you use ?
Your roll gauges should have check rail slots if they are to be useful, and these slots are set at slightly different positions for different sizes and thicknesses of rail !
The fact that wagons and coach bogies go through your points without problems, but not you 0-6-0 or 6 wheel rigid part of a locos chassis (your Prairie) implies that it is likely to be the check rails next to the frog that are too tight, as you said the locos "Jam". This being the classis indication of check rails simply being possibly only 0.5mm too tight.
To move the check rails next to the frog out slightly, will unfortunately disprupt the position at which the blade rails bend to form the check rails. The position of these bends will have to be moved slightly towards the tiebar, to allow the check rail part to also be moved out slightly to create a wider gap.
I have built hundreds of points in all scales from Z to O gauge. Some of my latest "OO" scale handbuilt points will be seen in my thread "Basingstoke in "OO" 1958-67" in the category "Modelling real locations". Run through that thread to find the pictures of these points before I ballasted them, which may help you visually to pinpoint your problem. You can always leave a further Post there if you have further questions and I'll try and help !
The Duke 71000