Subject:
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Re: New Parts Drawings - Plates, Slope, Track Pieces
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Newsgroups:
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lugnet.parts.custom
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Date:
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Sat, 5 Feb 2005 12:46:04 GMT
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Viewed:
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8824 times
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In lugnet.parts.custom, Darrell Urbien wrote:
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In lugnet.parts.custom, Mark Bellis wrote:
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Are you doing 3rd angle projection or 3D?
10 minutes is a lot less than it took me in Paint. I suppose once you’re
trained in AutoCAD, a lot of things are quick.
Could you post jpegs of the results?
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Hi,
Yeah, I’m working in ACIS Solids, then exporting to STL, then from STL2DAT.
I’ll try to do a few more this weekend and post the results to the same
folder. Something to do between TO soundbytes, anyway.
Is the DAT file helpful at all, or do you just want the orthographic
views/renderings? The views and images are cake compared to futzing with
converting the 3D model to DAT!
Darrell
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Please don’t go to a lot of trouble on my account!
It’s just that I usually post jpegs or bitmaps of things to my Brickshelf, since
anyone can view them without any special software. I’m not seriously into CAD!
If I had the facilities to actually make some of these parts, I might think more
seriously about CAD. I did download MLCAD, but have hardly used it yet due to
lack of time. If I did CAD I wouldn’t have time to build! You can see from my
Brickshelf that I major in trains and technic:
http://www.brickshelf.com/cgi-bin/gallery.cgi?m=mbellis My CAD expertise is
more developed in circuit diagrams (see technic mindstorms folder), but this is
2D and very quick in Visio, now that I’ve drawn a few component symbols.
If others want to make a library of wished-for parts, then CAD would be the way
to go. If the relationship with TLC’s parts design department could be
established, I’m not sure what format would be best for submission of designs.
I suggest some sort of universal engineering drawing, that could be converted to
whatever they use.
For now though, I suggest a format like jpeg or bitmap that everyone can see
without CAD software, so that we can maximise community involvement. Those with
CAD expertise can draw parts that others have thought of, as well as their own,
and we could make a collective submission to TLC. I’ve realised that I haven’t
time to do everything on my own, and that I need to work as part of a team in
the community with others who specialise in different skills.
If you can draw parts easily and post 3D or 3rd angle projection jpegs on
Brickshelf, these parts, which I have actually made, would be useful:
1. Axle peg with peg cut off, leaving axle and bezel. Start with this piece:
http://www.peeron.com/inv/parts/3749
These are so useful that I’ve made at least 50 of them! They go through a round
hole into an axle hole on another piece, allowing them to pivot in an 8mm wide
space. Great for valve gear on steam engines, supporting wheels alongside train
motors, and many other uses.
2. Peg with stud, with stud cut off, leaving peg and bezel. Start with this
piece: http://www.peeron.com/inv/parts/4274
Also useful for pivoting two 4mm wide pices with round holes in a tight space.
3. 24mm Pulley with all holes cut off except centre axle hole and one hole at 30
degrees from the axle alignment. Hold the pulley with the holes in rows of 2,
3, and 2. The off-centre hole to keep is one of the holes in a row of 2. The
result is a crank offest by 30 degrees, or 60 degrees if you reverse it. When
used with the centre on an offset of 1 stud on a 40-tooth cog or model team
wheel, the result is a 0.5 stud offset from the wheel centre with a 90 degree
lead or lag, for steam engine valve gear. Start with this piece:
http://www.peeron.com/inv/parts/4185
4. Steam engine expansion link. Start with this piece:
http://www.peeron.com/inv/parts/6632
Drill out one of the end axle holes to make it a round hole, then make the cut
hole and the centre hole into one slot, so that a peg could be in the hole and
slide along it.
5. 3L 4mm wide liftarm and 2L liftarm with one axle hole and one round hole. To
make them, start with this piece: http://www.peeron.com/inv/parts/2905
Cut the triangle into three, making one 3L liftarm with 3 round holes and two 2L
liftarms each with one axle hole and one round hole. Tidy up the edges to give
them rounded ends. To CAD them, start with the 3L liftarm, as 4. above. I used
the 2L liftarms in my Apache helicopter, to do cranks for the pitch control in a
small space. Both pieces have many uses!
6. Quarter bush. Cut this piece in half to make two 2mm-wide bushes:
http://www.peeron.com/inv/parts/4265c
Great for offsetting rotating things so that they don’t bind on each other.
Also for spacing axles in tight spaces, such as vertical axle pivot on
articulated train bogies. I keep making more of these!
These are parts that I would very much like TLC to make properly, since my
cutting and filing isn’t perfect! If you drew them I would put your name on the
drawings and post them in my Brickshelf folder of parts that I’ve made.
Mark
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Message has 2 Replies:
 | | Re: New Parts Drawings - Plates, Slope, Track Pieces
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| (...) Please consider not posting bitmaps. They are very space intensive and take a long time to load. Instead use a lossless compressed format like .gif if you can. In my view jpegs are not as good for things like line drawings, they are better for (...) (20 years ago, 5-Feb-05, to lugnet.parts.custom, FTX)
| | | Re: New Parts Drawings - Plates, Slope, Track Pieces
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| (...) Hi, No real "trouble" - I do this for a living. It's the DAT conversion that's slightly fussy. If you're not using MLCAD with your custom parts, I don't know if there's much demand otherwise! So I may as well just skip that bit. (...) Somehow (...) (20 years ago, 6-Feb-05, to lugnet.parts.custom, FTX)
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Message is in Reply To:
| | Re: New Parts Drawings - Plates, Slope, Track Pieces
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| (...) Hi, Yeah, I'm working in ACIS Solids, then exporting to STL, then from STL2DAT. I'll try to do a few more this weekend and post the results to the same folder. Something to do between TO soundbytes, anyway. Is the DAT file helpful at all, or (...) (20 years ago, 5-Feb-05, to lugnet.parts.custom, FTX)
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