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2003 Pattern
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2025 LEGO Education Scien...
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Part Request - 51008pb01 ...
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reviewing obsoleted parts
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Ring primitive update |
Posted by: Orion Pobursky - 2024-01-11, 16:27 - Forum: Parts Tracker Discussion
- Replies (8)
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In order to align all ring primitives to the"ring" vice "rin" or "ri" naming and prevent 100s of parts having to pass through the PT, I intend to do the following:
- Create new "ring" primitives and submit them to the PT (these will be fastracked if already CC BY 4)
- Obsolete the old "rin" and "ri" primitives and submit those to the PT (these will also be fastracked if already CC BY 4)
- Certify those 2 groups of primitives via the normal process
- Once certified, update all the affected parts to the non-obsolete primitive via manual database action. The official parts will be flagged as receiving a minor edit and will automatically be included in the next part update.
Since this circumvents the normal PT process for some parts, I'd like to ensure there are no major objections to this plan.
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Axle Length vs Axle Stopper |
Posted by: Gerald Lasser - 2024-01-10, 21:34 - Forum: Parts Authoring
- Replies (22)
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I am starting the thread based on the discussion that evolved here on the PT concerning part 72008, which has no through holes, but an axle stopper at the centre.
There are some other parts that have a stopper, but no matter how small it is, this is currently incompüatible with our axel lengths, which are multiples of 20 LDUs.
Here is Magnus' statment:
Magnus Forsberg [MagFors] made the following comment. 2024-01-10 16:53:49
This is perhaps a good opportunity to discuss the error in all similar parts.
The hole needs to be exactly 20 ldu deep, but in most cases it has been modeled with a divider at 19.5, 1 ldu thick.
That's not correct.
All Technic Axle are made using the axle.dat primitive. Or something more suitable, when needed.
That primitive is not correct. A real axle has a slightly bevelled, convex end. Making it possible to have the 2 axles pushed all the way into the stopper ring, wich has a coresponding concave bevelled design
The axlehole primitives in this part need to be 20 ldu deep, to allow a correct position of a mounted axle.
But we need to also have a stopper, 1 ldu thick. It doesn't add up.
When I reworked the axlehole primitive I found that many parts use a primitive that is only 19.5 ldu.
This will be a problem in connection seeking SW, that will not allow a correct position of the axle. The hole isn't deep enough.
And Max' measurement of the Axles in real life:
Max Martin Richter [MMR1988] made the following comment. 2024-01-10 18:24:00
All axles I measure are shorter than our models.
2L = 15.7 mm
3L = 23.4 mm
4L = 31.7 mm
5L = 39.4 mm
6L = 47.7 mm
7L = 55.5 mm
8L = 63.5 mm
10L = 79.4 mm
12L = 95.2 mm
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