|
Post by kioskfan on Oct 21, 2017 19:50:04 GMT
![Glamor Shot](https://thingiverse-production-new.s3.amazonaws.com/renders/1c/52/6c/4e/ff/f7f790577dc0bdef8dfc983659453c0b_preview_featured.jpg) I know it's beautiful isn't it? I've been using and researching acme screws for about ten years and at one point had access to a fancy acme tap which has since gone missing and that's a shame as it cost a few hundred dollars. This tap would have allowed me to create the same style anti-backlash nut as shown above but in a more solid material like brass or steel. Thanks to some kind thingiverse user I found a cad model for this exact thread and I used it to 3D print a few hex nuts just to see if it worked. When I printed and then threaded the nut it was a bit more than surprising that I could actually print a thread, mind you a 1/2" acme thread is about as course as you'll ever see this side of ship or bridge parts. ![Cad Model](https://thingiverse-production-new.s3.amazonaws.com/renders/92/87/85/6a/4a/0860fbb7168a760d3177c46df0ee6dd9_preview_featured.jpg) In the cad image above you can see clearly how the threads on a five start acme nut work. The springs apply tension to keep the nut from wobbling on the threads so the small nut is located from turning by the 10-24 bolts. Better hardware would be some kind of shoulder bolts and I will keep my eyes open for them but for now the tiny threads pose no problem for the amount of travel required here. ![Meccano Text Fixture](https://thingiverse-production-new.s3.amazonaws.com/renders/5e/8e/ce/46/25/c8c3df9a3fe078c66076f48935ea7c86_preview_featured.jpg) The test fixture pictured above allows some torque to be applied and the deviation measured by a dial gauge (not pictured, sorry) Meccano is handy for quick fixtures. ![Mounted to gantry](https://thingiverse-production-new.s3.amazonaws.com/renders/61/68/6e/e3/51/c37fa46a52ef860e0a0076a494fcbd52_preview_featured.jpg) Here's the nut mounted to the side of my Y axis gantry. ![](https://farm5.staticflickr.com/4488/37053109484_5e5f749a14_c.jpg) Another shot of the gantry. If you'd like to see the CAD files check out my Thingiverse page.
|
|
ralf
Junior Member
![*](//storage.proboards.com/forum/images/stars/star.png)
Posts: 93
|
Post by ralf on Oct 21, 2017 20:05:43 GMT
Really nice! What are you moving with that?
|
|
|
Post by tanephar on Oct 21, 2017 20:52:14 GMT
Wow, that is really nice work, and a great instance of lead screw starts.
|
|
|
Post by kioskfan on Oct 22, 2017 1:28:35 GMT
Really nice! What are you moving with that? ![CNC Router](https://farm5.staticflickr.com/4457/37669038756_868d0e580b_k.jpg)
|
|
ralf
Junior Member
![*](//storage.proboards.com/forum/images/stars/star.png)
Posts: 93
|
Post by ralf on Oct 23, 2017 15:27:38 GMT
That’s awesome, are you going to replace the wood with aluminium later?
|
|
|
Post by kioskfan on Oct 23, 2017 16:54:11 GMT
That’s awesome, are you going to replace the wood with aluminium later? This is the bench top proof version that will allow me to build my controller/power supplies. Most of these parts will be migrated to a larger all steel and aluminum 1 meter by 1 meter production machine. The Z axis is a commercial stage that I happen to have in my parts box, it will be replaced with a larger version able to handle a large spindle.
|
|