Colin,
Making your own etchings isn’t as hard to do as you may think, the set up
cost for the basic items will cost you about AUD$600 or about 300UK pound, the
hard part is learning to design your own artwork, instead of using CAD I use
Paintshop Pro7 and instead of actually working is a scale I simply use pixels at
72000 resolution each pixel is equal to .1mm. so I can etch components as
accurate as within .1mm.
Anyone who would like to learn how to accurately draw there artwork you can
contact me, I can teach you the basic techniques of how I start to work out how
to establish the fold points etc.
?
Brian
Rawbelle
County Workshops
Qld. Aust.
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Sent: Wednesday, October 12, 2016 9:32 AM
Subject: Re: [O14] Re: The Stronalacher Saga
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Thanks Guys
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We have Expong coming up so I hope to be
able to talk to a few people who are making 3D prints in 009, I realise that if
making a brass etch kit was easy we would all be doing them, that said, I do
take my hat off to you guys who spend your time making these kits for the rest
of us to b***er up, I am not going to promise anything as it could all change
over night so to speak, but the idea behind this thread was to see if any of the
locos I listed where produced in brass for 014, I think I have the answer is
generally no.
?
That said, I am sure Wrightlines used to do
Prince and the Darjeeling B tank and we know that EDM will have the L&BR
2-6-2 kit at some stage, and I think chivers fines lines used to do a 7mm scale
Vale of Rheidol 2-6-2 as well, but I am sure the others don't have kits, so
there is a lot of scratch building to do in that case.????
?
There is one photo of the 4mm version of
Stronalacher which always makes me go Wow after all this time and the Darjeeling
Garrett with a long slate train on a Wooden trestle bridge, I think that would
look really cool in 014, it was about 5ft in 009, that would be somewhere near
2.6 metres in length in 014.
?
Regards
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Colin
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???????
----- Original Message -----
Sent: Tuesday, October 11, 2016 9:01
PM
Subject: Re: [O14] Re: The Stronalacher
Saga
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From what I have seen and heard, a lot of etchings that have been done in
the past, they have tried to use too thick of a material which means it is
very hard to get folds correct, all of the etching I do is designed to use
.4mm. brass sheet, sometimes after spending countless hours designing the
artwork, the first test etch will reveal some problems, mainly because I got
mixed up with which side some fold points had to be on. Take a look at the
photos of a 91 Class SAR loco I am building, and study the steps, one photos
shows both sides of the steps as etched and also what the steps look like
after being folded, all one piece each.
<>
?
Brian
Rawbelle
County Workshops
Qld. Aust.
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Sent: Wednesday, October 12, 2016 1:11 AM
Subject: Re: [O14] Re: The Stronalacher Saga
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Very true.
Producing a working CAD drawing that can be turned
in to a pattern or an etch takes a bit of doing for 3D parts you need to add
shrinkage factors these change depending on the material being used to cast
the item.
?
For etches you have to flatten the part add bending
lines which change depending on thickness of material and the level of
distortion you need.
?
I have lost count of the number of etches I have
ditched and started again with.
And if you want to just produce a 3D
print all parts have interlock or be drawn from a solid as if it's just
touching and unioned the printer will see two parts not one.
?
I produced our first kit in 1999 and I'm still
getting things wrong on test etches and you would never know until you build
the prototype.
Marc
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Colin,
I think
you'll find a major difference between a drawing of a loco even in CAD and
what is needed for an etched kit. The 7mm Narrow Gauge Association has books
of drawings but most predate home CAD systems and were probably done
originally by someone to scratch build a model. A lot of the ones published
in NG&IRMR are proper works drawings. Both sources need treating with
care, in the former case one doesn't know how much information the
draughtsman had and in the latter you need to watch what was actually built
as opposed to what was designed. All of course, thanks to someone's, efforts
far better than nothing at all.
Nothing
like publishing anything for some further information to crawl out of the
woodwork and make a fool of you.
Frank
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I
might be wrong in thinking this, but for me an 014 loco kit will need to
have weight, I would guess that if I had a half decent computer and the Auto
Cad programme I would have a go at producing 7mm drawings to make up brass
etched kits and to also make the masters for the 3D Cad castings as
well.
I
think 014 has a lot going for it, and if I had the space then I would
consider building a model in this size, One thing which I am surprised with
and that is the lack of narrow gauge loco and rolling stock Cad drawings
which are available (you watch, some one will come on here now and tell me
where I can find them), but why stop there? as you are half way to getting
an etch of that item done.
May be it is just me
getting older and trying to cope with all this new
technology.
----- Original Message
-----
Sent: Tuesday, October 11, 2016 12:20
PM
Subject:
Re: [O14] Re: The Stronalacher Saga
There was a kit actually for the Darjeeling
Garratt in 7mm scale and I have seen the etchings and resin castings, now
in the possession of a friend and 7mm NGA member.? BUT this was, I
gather, one of just two test etches and has never been released.? If
anyone can track? down its heritage then the possibility remains!!
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