MagSafe iPhone holder for ARRI rosette mount

This is a frame and cover for an iPhone MagSafe charger to be mounted on a camera rig or similar mating up with an ARRI rosette for angle adjustment.

Possible use cases

• Shooting notes

• Remote monitoring

• Recording BTS or instructional content

• Device configuration

As the MagSafe isn't a rigid and fixed mount, this is probably not the solution for high action shoots, but for scenarios where the camera is mostly steady, maybe single operator, remote controlling a B-camera and similar scenarios, or maybe just for an easy holder for reading notes or manuals during rig setup, where the phone is then removed for the actual shoot.

Design and variations

The design is made using OpenSCAD and has a bunch of configuration options, primarily a few different settings for the rosette.

• ARRI rosette with 20mm spacing of the screws (this one includes a rounded square key, that seems to be used on eg. the Kondor Blue replacement rosettes)

• ARRI rosette with 22mm spacing of the screws (seems to be common on some 3rd party replacement rosettes)

• F rosette, which is one I have designed and used on a 3D printes camera cage rig (this prints pretty well, but isn't as fine grained as the ARRI ones)

It's also possible to fine adjust the size for the MagSafe charger puck, as the 3rd party one I have isn't the same size as the official 25W charger from Apple.

The length of the arm can also be adjusted, though around 80mm should work with most iPhones, except maybe the MAX variant when in landscape orientation.

3D print in plastic vs. CNC in aluminium

This does 3D print relatively nice without support and it's also pretty sturdy and the Apple MagSafe charger fits with a very snug fit. If it feels too snug, the diameter can be fine adjusted using the Customizer in OpenSCAD.

If this is to be made in aluminium, a snug fit isn't going to work, but in that case, the design should probably be slightly changed to use set screws or similar to hold the charger in place, maybe with a small curved piece to protect the charger from scratches.

Assembly

After printing the pieces, insert the finger screw knob into the opening with the hex cutout lining up with the hex opening in the holder part. Then insert an M6 x 25mm hex bolt, line it up and press it firmly into the finger screw knob. It's a snug fit, but that helps it stay in place.

Then screw in the replacement rosette (either a Steel one if you have it, or the 3D printed one) and secure it with 4 pcs. M3 x 6mm countersunk screws into the plastic. There won't be a high stress on these screws, so M3 into plastic is OK.

Then insert the Apple MagSafe Charter from the back, aligning the cable with the opening and pressing it in. There is a tiny little lip in the 3D print on the side that faced the print bed, so be careful not to press it all the way through, but it should stick out just a tiny bit, to that the phone touches the charger but not the 3D printed part. Then place the cover and secure it with 8 pcs. 2x6mm selv tapping screws. This might be a little overkill, but I kind of like the look.