Garden Railway Forum

Trevor Thompson wrote: Sat Nov 09, 2024 9:51 am Philip

If you want the stl files for the Birmingham coaches - just ask. ......

What resin are you currently using?

Trevor

The F & B Birminghams are, I think, slightly different to the FR ones, not least because the wheels are up inside the body, under the seats, but I haven't looked in great detail. I'll keep it in mind though, thanks.

For some time I've been using the Sunlu ABS-like Water Washable in grey, but it seems to have become unobtainable recently. I used my last bit of it last night and I have a bottle of the Anycubic version being delivered today. Never used before so will have to see what happens. I did have some Elegoo water washable but that was rubbish and I wouldn't touch it again for all the resin in China!

Philip

Yes the coaches you are interested in are more akin to the Ashbury 4 wheel coaches on the Festiniog, but of course they are slightly different.

However the Ashbury drawings might be a good starting point - and I have drawn those. Sketchup drawings available if required.

The coal insert is now in place and I think it does what I was looking for:
Trevor

Your coal looks great now it's finished.

I have the F & B coach drawings in the book, so I'll be able to compare when I get that far.

Trevor Thompson wrote: Sun Nov 10, 2024 9:41 pm Philip

Yes the coaches you are interested in are more akin to the Ashbury 4 wheel coaches on the Festiniog, but of course they are slightly different.

Actually, I'm an idiot and got my Birmingham and Ashbury mixed up. The F & B ones ARE Ashbury, not Birmingham. Sorry.

It is a long time since I finished this model - but I still haven't been able to get it to run properly. It ran for a few laps at Peter's railway a couple of weeks ago pulling the new ballast wagons - but then it stopped - ceased solid.

The issues are to do with the resin printed chassis - and the way I assembled it.

Namely:

• Connecting rods bending
  connecting rods binding
  chassis warping

I have "gone off" resin printing somewhat!

So I have been applying my new found skills with fusion 360 to re-design the chassis, wheels, connecting rods, and motor mount. In particular I want to be able to replace the motor if required, and adjust its position accurately. Testing the assembly will be easier if I can separate the chassis form the footplate for testing. So to that end I am about to filament print these re-designed components:
I have made the motor mount in 2 parts screwed together, and the whole arrangement then screwed to the chassis via a slot each side so that it can be slid along to engage the gears properly.

I will let you know how I get on!

Trevor