Pegasus Pocket Powerbox Advance 2-inch bracket

I designed this bracket to mount my PegasusAstro Pocket Powerbox Advance to a 2" tripod leg. The design is unique in that the strap that secures the bracket pulls against spring-biased mount points. This enables extra compression to be applied to the leg for a more secure attachment.

To detach the strap there is a hole on each side designed to accomodate a flat-bladed screwdriver. Push in and pry the hook out away from the bracket - this will compress the spring and release the strap.

You'll need four M3 screws to attach the bracket to the Powerbox. I found what I needed from the extra parts included with my Prusa kit.

The "curls" under the sides of the bracket were added as a place to tuck in wires behind the bracket. You can also use the folds of the spring for the same purpose as long as the wires don't impede the flexing of those features.

The tolerances on these parts are fairly tight, so make sure your printer is not over-extruding. Also the parts are designed to be printed without supports, but you can add them if you desire. Mine handled the bridges pretty well despite the use of PETG (which tends to sag a lot).

Update 12/30/20: Added parts to fit a 3" leg. Note that this 3" design has not been tested so if you make it, please let me know how it works. Thanks!

Update 5/15/21: Based on comments in the Cloudy Nights forum, I've added two brackets using dovetails instead of clamps. One is a finderscope-style dovetail, the other is a Vixen-style dovetail. A couple of notes on these models:

• I have not printed or tested them, but they are based on published dimensions so they should fit (see forum link above for photos of printed brackets)
• Most dovetail mounts use screws to force one side of the dovetail into its pocket. Keep in mind that the material that you're using is much softer than the screw! If the screw is narrow or if you tighten it too much you'll damage the mount and its lifetime will be diminished. If I knew the location of the tightening screw I would make a cutout for a small piece of metal to help distribute the load. Another option is to drill and countersink a hole for a flat head screw. If you line up your flat head screw with the mounting screw you will be able to have a tighter connection with less wear on the mount.

Update 6/2/21: I've added a "tall" version of the finderscope mount that will help clear thumbscrews mounted parallel to the dovetail. Thanks toDoogs20 for his suggestion on the Cloudy Nights thread!

Update 5/16/23: Imported this model from my Thingiverse to share with a wider audience

Printing/Material Notes

Given that the leg-mount design relies on spring force to hold it in place, I would suggest using PETG or ABS. PLA should print just fine but I wouldn't want to count on it for maintaining the spring load over time.

For the dovetail mounts, use a strong a material as possible and consider adding a metal shim between the mounting screw and the dovetail surface to minimize gouging (unless you only plan to install it once!)

Print Settings

Printer Brand:

Prusa

Printer: 

I3 MK3S

Rafts:

Doesn't Matter

Supports: 

Doesn't Matter

Resolution:

0.3 Layer height

Infill: 

N/A but use 4 vertical perimeters

Filament: Novamaker PETG Blue and Black

Category: Hobby