There are a number of wheels with an outer diameter of around 30mm, but they are very inconsistently described as 30mm or 30.4mm across different websites.  I noticed that LDraw is the most consistent here, using 30 (mm) for all four of these parts.  (Within MLCad they appear to be exactly the same width.)

1. Are they actually the same size, or are they actually measurably different?
2. Even if they are ever-so-slightly different, is 0.4mm so small that almost nobody cares?
3. Does LDraw prefer technically accurate measurements, or is it generally preferred to nudge measurements ever-so-slightly to make the system work better together?

I would like to make my part naming both technically correct and consistent.
---Tom

LINK TO RELEVANT PARTS: https://brickarchitect.com/parts/categor...artstyle=1

P.S. Here are dumps of the part names across the relevant sites:

56904 (14mm wide)

• Brick Architect Long: 30mm D. × 14mm Wheel w/ Technic Axle Hole
  
• Brick Architect Short: 30mm D. × 14mm, Axle
  
• Bricklink: Wheel 30mm D. x 14mm
  
• Rebrickable: Wheel 30 x 14
  
• Brickset / LEGO.com: RIM NARROW Ø 30/14 W/ CROSS
  
• LDraw: Wheel Rim 14 x 30 with 6 Spokes and No Pegholes
  

• Brick Architect Long: 30.4mm D. × 20mm Wheel w/ Technic Axle Hole, 5-Angled Spokes
  
• Brick Architect Short: 30.4mm D. × 20mm, Axle, 5-Spokes
  
• Bricklink: Wheel 30.4mm D. x 20mm with No Pin Holes and 5 Large Spokes
  
• Rebrickable: Wheel 30 x 20 5-Spoke
  
• Brickset / LEGO.com: RIM WIDE DIA.30X20 W/ CROSS HOLE, NO. 1
  
• LDraw: Wheel Rim 20 x 30 "Torq Thrust" with 5 Spokes and External Ribs
  

• Brick Architect Long: 30.4mm D. × 20mm Wheel w/ Technic Axle Hole, Angled Spokes
  
• Brick Architect Short: 30.4mm D. × 20mm, Axle
  
• Bricklink: Wheel 30.4mm D. x 20mm with Center Axle Holes Motorcycle
  
• Rebrickable: Wheel 30 x 20 with Center Axle Holes
  
• Brickset / LEGO.com: RIM, WIDE, DIA. 30X20, W/ CROSS HOLE
  
• LDraw: Wheel Rim 30 x 20 with 3 Dual Angled Spokes and 4L Hub
  

Hi,

Does anyone have a good photo of these two drawings?


  2003pb02.png (Size: 324.38 KB / Downloads: 56)
  63896.png (Size: 408.19 KB / Downloads: 56)

Kind regards,

Lisa

Can anyone point me to the specifications/rules for obsoleted parts? (It might be easy pickings to get off the tracker...)

Since I am not great at 3D modelling, I still wanted to give back to the community, I decided to order a 3D scanner so some of the older parts can be scanned since there is quite a lot missing from 2000 - 2020 from when there were no 3D models available. Some of the very old stuff was also hand measured so I dunno if those will want replacing since it depends how often anyone even uses those old parts really.

The scanner I will be getting is the Creality Raptor Pro.

So is there any particular preference of things that people would like scanned to start with?

If I scan the parts would someone be willing to get them ready so they can be added to the tracker?

Reducing the meshes to some kind of sensible size should be something I can do.

Would it be possible to have another sublevel in the Primref meny?
I want to have direct links under 

Curved Primitives
  -- Three dimensional
    --- Cylindrical
    --- Conical
    --- Torus/Spherical


  meny.png (Size: 7.66 KB / Downloads: 25)


Second request.

The sorting of the Mixed-Mode Tori is not correct.
All mixed mode torus primitives are by definition Hi-Res primitives. Now they are sorted some as Regular, and some as Hi-res.


Third.

There's a low res torus in the 8-folder, missing on the Primref page.
https://library.ldraw.org/parts/23637

Wondering if anybody could get on to getting part 2589pb01 (Koala) to be created in the database? Making an Australia Moc and this part would be helpful.

Thanks!

Hi, I would expect these would be in the parts library but I can't find them. In BrickLink it's Tile, Round 1 x 1 with Black Capital Letter A Pattern (Item No: 98138pb211  Alternate Item No: 35381pb211) and the rest of the letters/numbers/symbols continue from there. I used these in a MOC and want to make a digital version of that MOC.

Do we have these in LDraw at all? How do I find them if so?
Also, the "READ ME FIRST - Part Request guidelines" post (closed thread, so mentioning it here) has a dead link to digital-bricks.de. Has that resource found a new home or is it just gone?

The code
1 16 0 0 10 1 0 0 0 1 0 0 0 1 stug-1x4.dat
1 16 0 0 0 1 0 0 0 1 0 0 0 1 stug-1x3.dat
1 16 0 0 -10 1 0 0 0 1 0 0 0 1 stug-1x2.dat
produces this:

  stugs.png (Size: 34.49 KB / Downloads: 29)
Based on the description below, I would have expected that the number of studs in the Z-direction would have changed. To my surprise, the number of studs in the x-axis increased. I suspect the official reference guide is wrong about stud groups. I'm also unhappy that the reference guide doesn't tell me from which direction the logos are readable (they're actually sideways).

Stud groups are provided to reduce the size of part files with many regularly spaced studs. The naming convention is stugN-XxZ.dat, where:

    N = type of stud (regular stud, hollow stud, underside stud, etc.)
    X = number of studs on the x axis
    Z = number of studs on the z axis

To prevent an overload of the library with excessive combinations, the numbers on the x and z axis are limited to:

    1xZ stugs
    Xx1 stugs (Due to stud orientation you cannot rotate a 1xZ stud group by 90 degrees to get a Xx1 stud group)
    XxZ stugs where X = Z

The current PT version is on the left, while another variant using the same number of vertices is on the right. As can be seen from this view, the size of the plus shape is bigger (it extends a little further away from the centre) on the right (salmon colored).

  plus.png (Size: 68.77 KB / Downloads: 65)

The length of the orange bar (below) is closer to the shape on the right (above) than the shape on the left (above).

  aend.png (Size: 10.64 KB / Downloads: 65)
The black dots in the picture above form an almost perfect quarter circle.
The red dots above show the tapering - the narrowing of the axle main fins.

In this view (below), aided by the magenta plane slicing thru the middle, we see that the curvature at the plane is more round on the right than on the left.

  plane.png (Size: 44.7 KB / Downloads: 65)
Finally, the tapering is visible on the left (green vertexes), while absent on the right (yellow vertexes has no tapering).

I claim that without adding more vertexes, one cannot satisfy both a) and b) where a) is the tapering, and b) is the roundedness along the magenta plane combined with a larger plus shape.

hello everyone!!! it's me again without a doubt grateful to find this page and even more so that you all helped my find those buzz lightyear parts!!!!!!! but I have another request. can't have buzz without ZURG!!! please can anyone help a bortha out????

can anyone help me find
his head

https://www.bricklink.com/v2/catalog/cat...idColor=89

and his shoulder part?

https://www.bricklink.com/v2/catalog/cat...idColor=11

thank you, all much love!!!