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3D CAD:
GT2 pulleys for focusing a camera lens


Contents:

  1. Calculating number of teeth
  2. CAD of 15 teeth pulley, part 1
  3. CAD of 15 teeth pulley, part 2
  4. CAD of 15 teeth pulley, part 3
  5. CAD of 15 save and prepare to print, part 4
  6. CAD of 174 teeth pulley, part 1
  7. CAD of 174 teeth pulley, part 2
  8. CAD of 174 teeth pulley, part 3
  9. CAD of 174 save and prepare to print, part 4
  10. CAD of 174 clean from support material, part 5
  11. CAD of 174 new version, part 6
  12. CAD of 174 slicing and printing, part 7
  13. CAD of 12 and 15 teeth, new design, part 1
  14. CAD of 12 and 15 teeth, printing, part 2
  15. CAD of 180 teeth pulley, part 1
  16. CAD of 180 teeth pulley, part 2
  17. CAD of 180 teeth pulley, part 3
  18. To be continued

Note:
I take no responsibility or liability for what are written here, you use the information at your own risk!


10, CAD of 174 clean from support material, part 5:

When it was printed I noticed it has supports at a lot of places that's not needed. Must be something wrong in my drawing.


Inspection of the pulley:

3D CAD: Making a drawing for GT2 pulleys to the focuser of lens

It looks very good and all dimensions are what I had designed it to be. But in center is a massive flat surface. It should be a big hole in that place.


3D CAD: Making a drawing for GT2 pulleys to the focuser of lens

Hole to the lock screw.


3D CAD: Making a drawing for GT2 pulleys to the focuser of lens

Backside of the pulley, the raster is the support that has built up.


3D CAD: Making a drawing for GT2 pulleys to the focuser of lens

The outer ring is easy to brake off, it was only used to hold it against the printer bed.


3D CAD: Making a drawing for GT2 pulleys to the focuser of lens

Normally it should be easy to brake off the support material, but in this case it added a massive 2 mm surface on top.


3D CAD: Making a drawing for GT2 pulleys to the focuser of lens

I made a lot of holes in a circle around the rim.


3D CAD: Making a drawing for GT2 pulleys to the focuser of lens

The massive center surface that shouldn't be there.


3D CAD: Making a drawing for GT2 pulleys to the focuser of lens

More brutal force.


3D CAD: Making a drawing for GT2 pulleys to the focuser of lens

And at last, some fine trimming, the surface look ugly but otherwise it looks okay.


3D CAD: Making a drawing for GT2 pulleys to the focuser of lens

After a massive work it look like this.


3D CAD: Making a drawing for GT2 pulleys to the focuser of lens

Thread of M4 for the locking screw.


3D CAD: Making a drawing for GT2 pulleys to the focuser of lens

A Christmas present from my mother-in-law, a box full of screws and nuts!


3D CAD: Making a drawing for GT2 pulleys to the focuser of lens

The M4 screw fit, but I need to drill the hole to 4.2 mm even if it was already in the drawing set to that size.


3D CAD: Making a drawing for GT2 pulleys to the focuser of lens

Looks more professional when letting the screws sunk into the material.


3D CAD: Making a drawing for GT2 pulleys to the focuser of lens

When attaching the pulley on the lens I found the buttons protruding and got a little problem. I expand the slits to 12 mm and after that it slide into its place. Now I noticed that the inner diameter I made was for another lens.

No problem with that, I can use this pulley for that lens. But now I want a pulley that fit my Canon 300 mm lens, and also another lens, the Pentax medium format lens. I have to find a better way to make the drawing more customizable. Mass production, and I have an idea how to make the drawing to do that.

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