NSR 4 wheel coach.

Have a look, see what you think ?



Light support


Medium support


Heavy Support

 

And raft



Now the Roof has printed fantastic.... But the chassis has failed and just left the supports so that's another strip after 3 prints. Hopefully the fep is OK as thats it now till pay day.

Here was the supports




I'll let you have a look and then I'll go away and think about what you suggest and try to implement it.

 

Here are some pictures of the bottom side of the coach. The seat bottoms have blistered…??

and no idea why the corners have covered over as you can see the edge on the good side where the chassis panel shouldn’t in it.

 

The chassis fail was a small setback.. believe I miss understood one of the suggestions re its orientation. It’s now been redrawn.
And ready to reprint.

On the same print run was the roof and I’m pleased to say it worked very well and fits just as nicely.


From one end.

From the other.
Close up of the roof vent.

it’s only had its wash and not yet been cured so not had any clean up, however, having done this with some support suggestions from @Mossy there is not a single mark on the inside of the roof where the support scaffold was.
Many thanks for that!

 

Only one fail on the remaining parts (vac cylinder, pipe and hoses, brake hangers etc) which was the central V hanger for the main bar to the cylinder and that transferred it out to the hangers. It’s actually the block where it slotted in to the chassis, so I’ll re-orientate that part and print with the brake rigging.


Now last night I left the printer running on the chassis. This time it’s printed but thrown up the first issue of printing someone else’s artwork.. it’s simply too thin, which may be why it failed last time! I’ve gone side on to the bed plate so it hangs vertical. Where mark had added his panel for his name and details it’s simply too thin surface wise and is almost transparent. I have not been able to check this as all the systems will only give a dimension for external surfaces, ie the outside box, and being an STL file won’t let you test for thickness etc.

I think my only option here is to pull in a new rectangle the same outer size and to a greater depth. see how we go.

always knew it was going to be a learn by trial.

 

Here are the parts to finish the coach and also a number of parts for Paul B for his Leek station project. The remaining toilets and a wide doorway.


The one part that failed.

the end nearest the camera should be a square block.

now the chassis.

and from the other side


As @Mossy finds, it may be usable for trial fittings etc so won’t go straight in the bin. I can sit and work out where we went wrong with the design. What I can’t fathom until it’s cleaned later is why the surface looks like a wicker fence? It’s not smooth at all?
I think we will also give he vat a clean and strain the resin before the next print.

more tomorrow.

 

Foot boards butt up to this part.



No idea re the other bits as I say, can’t measure an STL.

 

Leave that with me <wink> may have a plan re the running gear.
The chassis was only 1mm thick hence why it failed and even thinner where the text was. I’ve now made it 2mm so should be better. And for my copy, eliminated the text.

I could go more, and then recess.. infact, I’ve half redrawn the chassis just matching it up till it changes colour. What I may do it just do the whole thing and take it from there. I can then add some notches for the brake rigging.

May just sit on this for a day or two and sort it out.

also redone the coach body with increased support, so may press print on that tonight instead.

 

I decided rather than just bin the v1 chassis I printed the other night I would have a look at it.

I have no idea what happened on the surface as it was like it was covered in goo of some kind. This did clean off in the IPA with an old toothbrush. Leaving behind a smooth surface as expected, albeit rather thin and transparent in places where Mark had rebated for a name panel for his copyright.

in view of that, I opted to move on to V2 and redraw the whole panel from the start making up new little rectangle boxes to match the outline of the old STL file as best I could to .001 of a mm. So I’m confident I now have a better model. What this enabled me to do was add some strength by thickening the actual base section by adding another 1mm of thickness - this does then mean it throws out the alignment of a few other parts… except it didn’t, as with it now meaning a new model that could be edited, I could now cut and adjust as needed and was able to add small rebate sections for the brake hangers, brake rodding and the tank to slot them in to a set location each and every time.

this was printed last night and is now drip drying in the printer (as I’m on a day shift) and will be lifted out and checked tonight.

 

I realise I had not put an update on re the latest prints.
Brake hangers

Vac cylinder

Vacuum pipe, buffer and buffer shank

chassis v2

chassis v2

I had 2 parts fail that I will need to reprint and still have the brake rigging to also set up for the machine.

 

Setting aside that the body needs to be redone, it sits in to show how it could look.

although all dry fitted at the moment, it’s all staring to come together

sitting on its suspension




I now need to sit and have a look at how wheels and the brake rigging will all fit. I need to also get some wheels so may use some I have in at the moment as a test. See what side holes are required etc for the bearings and also the rods for the rigging.
The chassis on its own


and from the under side with some other detail dry fitted

all coming together well.
Next will be to try the buffers.
Andy