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One you guys a ways back gave me an idea. I have shimmed the guard rails. I think I learned about doing that in an N trak group I was in 30 years ago. But shimming the bottom of the frog might keep the wheels from dropping down. The flange depth on all my cars are all the same, so if I got the shim the right height so that instead of dropping in the gap, the flange rides on the shim.Tried to put a piece of plastic in there. That didn't work well. How about raising the area with a bit of glue? I put a dab of canopy glue on the floor of the frog, and if I need to, I can file it down a wee bit. Initial tests are promising. I am trying this on both Peco Insulfrog and electrofrog. If it doesn't work, I can easily peel the canopy glue out.If it does work, I'll do this on all other Peco turnouts.Bill Kepner
Bill, I don't see how the wheel could go down the wrong path when it rides back up onto the point of the frog unless the wheel is too far over to begin with. If that's the case, the fix really is to shim the guard rails on the outside rails away from the frog (as has already been discussed in here).
For the record, I used to have this problem with Peco code 80 turnouts and shimming the guard rails was a sure-fire fix. After that, as long as the wheelsets were in guage, I never had these types of derailments anymore.
Well, maybe, maybe not. I've had narrow tread wheel sets drop into Peco frogs and just stick there, hard. So the derailment is either a stringline in front of that truck or an accordion behind, if you don't enforce a slow order. I'd swear that in a couple cases I've had the front wheel going through the frog jar and twist the truck enough to derail the back axle off the rails. The real solution would be to shim the frog itself. Or to be precise, the wing rails. That would reduce the space available for the wheel tread to fall into. (I'll grant that shimming the guard rails may help additionally, and certainly can't hurt.)For the record, were you using narrow tread wheelsets?
I've had issues with the narrow-width metal wheelsets on my Atlas code 55. The BLMA gons were a literal "car-wreck" on my layout– Those narrow wheelsets would derail at the drop of a hat. For them to work (well) they have to be exactly in gauge and many are not exact enough for derailment-free operation. The Atlas metal wheels (that aren't the best looking metal wheelset out there) work like a champ. The FVM wide-width metal wheelsets work great also. Nope, the "wide's" do not look as good as the "narrow's" but I have a difficult time telling them apart under normal viewing conditions. For a plastic wheelset, and I still have many, I prefer the Atlas "browns". The work great on my Atlas code 55 trackage. The MT plastic wheelsets can be a wee bit more problematic– they'll pick a switch once in a while.
It's tough filing down the ends of a pointed axle and getting it to still spin true in the truck frame cones. I applaud your courage!When I do this, I remove both wheels from the axle and either:a) chuck in a Dremel and run the tip against a file and then progressively fine grades of sandpaper down to 2000 gritorb) (better) do it in a mill or lathe, followed by the sandpaper.The mill produces more perfect results, but the Dremel will do fine. I do think that getting down to super-fine grits of sandpaper at the end makes a difference. The axle points are polished that way and they really roll smoothly.I find that I can get the point to end up true and dead in the middle more easily this way.I don't disagree with anything you have offered. I worked on over 100 axles and that was more time than I really wanted to spend. It started as an experiment with the Rapido axles on their Panorama Line passenger cars. It worked there so I did it again here. I would have rather just used a commercial axle, but the warp in the trucks deterred that idea. But these axles spin very well and it proved to me that you don't have to have a perfect point on them with special lubrications or other stuff to get good operation from them. I didn't mention that some of the wheels were off center and others would wobble real bad. I didn't use those.