Fix linear actuator article link to stl file

Author: jpangburn

_posts/2021-10-26-linear-actuator-fix.md

@@ -22,7 +22,7 @@ It takes a while to get the nylon nut 3d printed/shipped, so this is the first t
 
 You have two options for printing the nut.  The first time I printed the nut in nylon it fit but was way too tight (I used the exact ACME 3/4" thread settings which doesn't leave any space at all because I don't know much about printing threads).  So I backed off the thread faces by 0.005" and the thread root/crest by 0.003".  It works great and fits on easily but I wonder if it should be more snug than this so it will last longer.  This file is [here](/assets/3dfiles/nylon_nut_v8.stl).  If you choose this file you can be certain it will work.
 
-I made another version with tighter tolerances where the faces are backed off by 0.003" and the root/crest by 0.002", but I have not tried it.  If someone tries it, please let me know how it works out.  It's available [here](/assets/3dfiles/nylon_nut_tighter_than_vt.stl).  If it still moves easily enough to be usable, then it would last longer but it may be too tight- I don't know.
+I made another version with tighter tolerances where the faces are backed off by 0.003" and the root/crest by 0.002", but I have not tried it.  If someone tries it, please let me know how it works out.  It's available [here](/assets/3dfiles/nylon_nut_tighter_than_v8.stl).  If it still moves easily enough to be usable, then it would last longer but it may be too tight- I don't know.
 
 There are lots of websites for 3d printing, but I like CraftCloud because they shop your part around to a bunch of suppliers to see what the various materials/costs are.  Kind of like an Orbitz for 3d printing.  I've used them a few times and things have always turned out well.  Here's a link to [CraftCloud's Upload Page](https://craftcloud3d.com/upload).  It will default to millimeters as the unit type, and that's correct because although the part was designed in imperial units the export file is created in millimeters.