Broad Ambition - The Model

[JanetAnne]

Put a clamp across it while you are trial fitting.... we have to do that on the full size ones sometimes!

 

[grendel]

ah, good idea, but a bit late as i have already rebuilt it, and fitted the switches.

[grendel]

more work progresses, after receiving a new power supply for my bench, tidying was done and space made for it, then it was time to drill out for and install the gauges, which then had the dials painted white. a morse control unit was 3d printed on high quality setting with 0.1mm thick layers, this gives a smoother surface.

I then chromed the surface with a chrome paint marker, these Molotow markers are not cheap, but do give an excellent chrome finish, just the operating handle to make from some 3mm brass bar now, then attach using an m2 bolt.

[Ray]

I think you are just trying to make me say Wow! again! Beautiful work Grendel 👍

[grendel]

Well lets see if we can wow you with the morse control, I took some 3mm dia rod, and filed a flat on so i could punch a dimple for the drill bit, then using a 1.4mm drill bit I drilled a hole, after checking it was central, i drilled it out with a 2mm drill (2mm hole through a 3mm brass rod, it needs to be perfectly central) after that it was a case of taking a 12mm x2mm bolt and bolting it to the 3d printed morse control.

then it was sit it on a 1p piece for scale , get out the extension rings and get some pictures, then with just the normal lens

[Ray]

WOW! 

[BroadAmbition]

WOW indeed 

Griff

[grendel]

right we have a quick thin coat of varnish on and the morse control fitted now

[grendel]

Today i am working two different methods to make the ships wheel, the easy method is to 3d print the wheel, the other way involves gluing 4 blocks of teak together, then it will be a matter of putting it on the lathe and turning the wood for the rim, then the boss, and then adding the spokes, this will also mean cutting a brass circle to make the brass parts, this is the hard way, i have already done the easy way, but i still feel the hard way will give greater satisfaction.

[Ray]

I know for sure which one you'll have on the finished model 👍 As a matter of interest why stick 4 pieces together for the lathe rather than a single block in the first place?

[grendel]

If I use a single piece I will have two points where there are short grain , where the wood can split, by using 4 pieces cut at 45 degrees, the short grain is avoided as the grain runs around the piece, the end of the wood will be turned to size, half way through the wood, then the wheel can be drilled and assembled, then cut to thickness, as it will be stronger with the spokes in place.

[Ray]

Thanks Grendel, makes perfect sense 👍

[grendel]

OK, I have looked for my faceplate, but from memory, it wont help as the wooden part is too small for the fixing points on the faceplate, so plan number 2 goes into effect, I need something to hold the wood part, so I have the solution, I have designed a faceplate in CAD, and 3d Printed it out, unfortunately I dont have the tap that corresponds to the lathe spindle so I will just have to reprint this with the correct thread already set on it, simple - so I will have printed a 50mm dia lathe faceplate fo fix the blocks to to turn the ships wheel parts. 

so now you can see some of the processes that go into some parts of the model, where a part has to be fabricated to enable another part to be made, next to decide which lathe to set up this part on.

[Ray]

Making the parts to make the parts! 👍

[FairTmiddlin]

2 hours ago, grendel said:

 next to decide which lathe to set up this part on.

Why not 3D print one

[grendel]

Well here are the faceplates, printed with hopefully enough thread to allow them to accurately seat on the lathe.

[grendel]

ok so now i have returned from my training in leeds and had a good sleep, its time to progress, one of my wood blocks has been added to a faceplate and is set up ready to start shaping the ships wheel, hey, if this doesnt work, i have realised i could turn it out of a piece of brass if the wood works out to be too tricky

[grendel]

well the teak turns nicely, so nearly there now, just about to drill for spokes

[grendel]

so the holes are drilled for the spokes, then spokes (cocktail sticks) added, after these are glued in place, the wheel is cut off from the block and cleaned up

[BroadAmbition]

Oh yes. Yet another successful operation. Well done 

Griff

[grendel]

next comes the brass ring

[grendel]

Brass circle cut out of 0.15mm brass, scissors for the outer circle, scalpel to cut the inner circle.

[Ray]

Lovely job, the piece you 3D printed to hold the wood on the lathe (sorry, I don't know the correct name) must be pretty strong, for some reason I didn't imagine that much strength, thought it may be quite brittle!

[grendel]

thats the faceplate, its made from ABS and pretty chunky, so brass ring attached and polished up and it looks quite pretty if i say so myself, for a first attempt i am jolly pleased with it. its no contest as to which one goes on the model

[grendel]

ok my only regret is the hole seems slightly off centre, not sure how as it was drilled while on the lathe with it running, but that will be hidden with a bolt and washer that will represent the centre boss.