MPCNC Burly Drag Chain System

This is an update to my previous MPCNC Drag Chain system, but for the Burly build. As before, this cleans up the wiring for the MPCNC while giving some easier connection options for lasers, spindles, etc.

You can find the first version and a much more detailed explanation at: https://www.thingiverse.com/thing:2743770.

There are two versions of this build and I'm choosing to put them both in this post.

1. If you're going to print the Burly parts, then I would suggest printing the "New XYZ" part from this Thing's directory. The "AttachedBracket" attaches directly to the side of the New XYZ using some press-in or melt-in inserts.

2. If you've already got everything printed, then there is a new Burly version that clamps on the XY part that can be easily retrofitted to an existing machine. This was the approach of the first version and is straightforward to add if the machine is already working. The screw is a 6-32 around 2.5" long with a trapped Nylox nut. In a "what was I thinking moment" I also continued the hole for the screw through to the other side of the nut so that you don't have to cut the screw to exact dimensions. You will have to clear the part with a 9/64 drill however (or at least I did in printing with PLA).

In addition, I have updated the Servo Brackets so that 1 1" angle aluminum extrusion can be used instead of the previous 3/4" version. Also, I've removed the inserts for the extrusion to make cutting it require less precision than before. Note that there is a mirrored version of the bracket because there are recesses in each bracket to make them fit better against the servos and rollers at each end.

The attachment point for the drag chain can use either a nut and bolt as before or plastic inserts.

I used these inserts from Mcmaster-Carr for the drag chain attachment and bracket attachments: https://www.mcmaster.com/92395a113. I've been told that this melt-in option also works well: https://www.mcmaster.com/94459a290.

I have printed the clamp-on bracket in PLA and ABS with good results. ABS is a bit more forgiving with mounting. If you use the attached bracket, you will certainly need to print the New XYZ in PLA, but the actual bracket can be any material (PLA, PETG, ABS).