MPCNC Belt Tension Add-on

myminifactory

I am remixing from http://www.thingiverse.com/thing:724999 and http://www.thingiverse.com/thing:1128468. While cutting a large print, one of the belt tension zipties came loose and caused the endmill to drag an 1/8inch too low across my carving. I looked around for a different way to keep them tight. Most other tension devices require reprinting the corners, so I modified one version to fit the original corner. Part A requires replacing the whole top side of the corner, but Part B slips into the original Ziptie hole of the lower corner. You may have to trim the tab on Part B to fit into the original Ziptie hole, but it's easier to trim off plastic than add more after that. If you decide to use loop bolts like I did, note which side of the printer has the most room when the slide goes all the way to the end (most likely the tool side). I didn't and lost a little bit of room on the non-tool side because the slide now runs into the bolt. This is easily fixed if you put the bolt on the side with the tool. If you don't want to use loop bolts like I did, just print 2.stl from here: http://www.thingiverse.com/thing:1128468. If you need to flip the parts, use the mirror function in either Cura or Repetier host. Lastly, if you compare the photos to the STLs, they're a little different. I modified both Part A1 and Part A2 to bring the belt a little closer to the bar. When I printed the original versions, they stuck out a little too far, but it doesn't really hurt anything and I don't want to waste more plastic to fix it for myself.