Braking a Binnie - Part 1
Yes, I did get my spelling right and mean braking not breaking.
The Binnie Engineering Hudson Tipper wagon is a staple of 16mm narrow gauge model railways. Understandably Fen End Pit has quite a few and one of them was converted many years ago to have brake standard to give a little variation. I'd often thought about converting a couple more to give one braked wagon per train of skips but never got around to it.
I decided that this might be a good challenge for my new 3D printer so I drew up the components which I'd need in Onshape. I 'modeled' 3 components, the skip extension, the brake wheel support and the hand wheel itself.
Finally, more for my own amusement and experience than for any real purpose I tried the assembly functions and put the virtual pieces together.
The resulting models were then downloaded from Onshape as .STL files which are them imported into Cura, the slicing software for my 3D printer. I positioned the parts on the bed of the printer, rotating the parts to give the best orientation for printing, in this case lying the brake support down rather than trying to print it vertically. I've chosen to print this with the finest settings and as you can see from the time estimate on the screenshot it ain't quick.
The output from the printer was pretty good given the relative cheapness of the printer. Unfortunately being black they were very difficult to get a decent photograph of. You can see the 'Raft' which the printer put underneath the parts in the printing process and the support structure added by the slicer to support the top of the brake end extension.
I've modified the Binnie chassis to remove some parts from one end to clear the new brake platform. This took just a few minutes with a piecing saw and scalpel.
The new brake platform, support and wheel fit on quite nicely. I'll need a little bit of filler to smooth down the joint but I'm rather pleased with result.
I'll post some more once it is assembled and painted.
David
- 5
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