Parameterized spring-loaded scope cap

Parameterized spring-loaded scope cap

thingiverse

# 3D printable spring-loaded scope cap This repository contains the 3D printable files for a spring-loaded scope cap for scopes, red-dots and magnifiers. The scope cap is designed to protect the lens of your scope from scratches, dust, and other debris when not in use. The cap is fully parameterized, so you can make it fit to whatever optic you have. I've included exported versions for the Holosun 503r and Holosun Magnifier HM3X (as pictured). ## Requirements ### Tools - Calipers - Wire cutters - 3D printer ### Materials #### Spring You will require some sort of torsion spring. This can be a hard part to source. The easiest and cheapest solution for me was to buy these miniature clothes pin at a craft store, take out the spring and bend it into shape. ![Miniature Clothes pin](https://cdn.thingiverse.com/assets/9d/90/8c/f8/e7/large_display_c67eab7b-5be7-4538-8d9c-235a4f827442.jpg) ![Miniature Clothes pin spring](https://cdn.thingiverse.com/assets/3b/6c/c8/e2/3d/large_display_e228ef0b-07ea-4162-8f57-3fa69ee85a39.jpg) All you need to do is bend one of the legs outwards. This is the required shape in the end: ![The same spring bent into the required shape](https://cdn.thingiverse.com/assets/df/51/fb/9e/91/large_display_3ed5e7ae-1928-4c12-bfc3-604e3b6ca2ca.jpg) #### Pin You will also need a pin to hold the optic together. ![Pin](https://cdn.thingiverse.com/assets/3e/03/e6/be/dd/large_display_61a1a593-e638-474e-a469-1e00fd1e2c7e.jpg) I suggest using 1mm copper wire. You can also use any other thick wire you have. Just set the `pindiameter` accordingly (see Customize). ## Printing Print the ring mount first. If it is too tight or too loose, edit the `diameter` (see Customize) and try again. Once it fits you can print the cap with the same diameter. ### Print settings I tried printing this in various different materials, but overall regular PLA works the best. #### Recommended Settings: - Material: PLA - Layer height: 2mm - Nozzle: 0.4mm - Infill: 100% ## Assembly 1. Insert the torsion spring into the ring mount. ![Spring inserted](https://cdn.thingiverse.com/assets/01/6f/86/75/6c/large_display_891b21fb-2b53-4848-ab82-2577d8116e41.jpg) 2. Bring the parts together and push the pin wire through. Cut the pin flush. The pin will not need to be perfectly straight. If it is a little crooked it will even hold together better. ![Pin inserted](https://cdn.thingiverse.com/assets/74/a4/18/6d/77/large_display_f99aa3f8-5e8e-4305-9a33-16fdc37b1296.jpg) ## Customize To get a custom cap for your particular optic, open `scope-cap.FCstd` with [Freecad](https://www.freecad.org/). Open the Spreadsheet from the sidebar. ![Freecad spreadsheet screen](https://cdn.thingiverse.com/assets/ab/75/ef/4d/06/large_display_d35d7eee-6d40-4f79-9a1e-ef0a11f022a0.jpg) The yellow fields are the fields you can change (the ones next to it are just for reference). The most important value is the inner diameter. Measure your optic with calipers and enter the value (using millimeters). ![Measure your optic using calipers](https://cdn.thingiverse.com/assets/dd/43/39/34/15/large_display_0a6e9670-91e5-493c-a47d-5ddbb0dd2c8f.jpg) You can also edit the height of the mount. Depending on how much or how little space you have on your optic. Depending on what kind of spring (see chapter Spring) you have you'll also have to set the parameters for it in the lower (wire) part of the spreadsheet. This can be a bit complicated, but again, calipers help here. You can also set the diameter of your pin here (`pindiameter`). After you've finished editing the parameters. Click on and export (`File->Export`) each of the two shapes. One is the cap and one is the ring mount. ## Troubleshooting ### It is too loose, too tight Adjust the `diameter` accordingly. ### It is too hard to open / It won't stay closed Adjust the `outerslack` parameter. Increase the value slightly to loosen it and decrease the value to tighten it.

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With this file you will be able to print Parameterized spring-loaded scope cap with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Parameterized spring-loaded scope cap.