SKÅDIS Gravity Claw Controller Holder - Yes, It Really Grabs (Xbox)

Yes, it really works: put your controller down and its own weight closes two claws around it. Lift it and the claws open again by themselves. No springs, no magnets, no batteries: just two printed rockers, two printed pins and a pair of counterweights.

The controller stands upright on the "feet" of two levers. Its weight pushes the feet down 7 mm, the levers turn on their pins and the claws swing up and in, stopping 2 mm from the sides of the controller. When you pick it up, the round counterweight drum on each lever is now the heaviest thing around, so the levers rock back, the feet rise and the claws spread out, ready for the next time. The animation (picture 4) shows the whole cycle.

Details

• Made for an Xbox Series / Xbox One controller (153 × 106 × 61 mm, about 280 g) standing up, buttons to the front. Closed claws leave a 157 mm gap (2 mm per side); a 160 mm PS5 DualSense does not fit.

• Whole holder: 284 × 133 mm on the wall, 75 mm deep. The claw tips swing out about 23 mm each side when open.

• Each lever turns 16° between two end stops: a fixed Ø7 peg on the base runs in an arc slot in the lever (0° closed, 16° open).

• Pins Ø10 mm, printed upright as part of the base, in Ø10.7 holes (0.35 mm clearance), 0.4 mm end play. A printed C-ring snaps into a groove at the tip of each pin to keep the lever on.

• It starts closing at about 75 g (90 g with pessimistic friction): any controller from 200 to 300 g closes it, a 50 g object does not.

• Graphite base with a white outline of the controller and a small HANMA logo, orange levers with white rings on the drums, all inlaid flush (0.8 mm).

Printing

• Two plates for the Bambu Lab A1 mini (0.4 mm nozzle) with the AMS lite, no supports. Nothing overhangs more than 45° except the short bridges over the clip pockets.

• Base: lying on its back, pins straight up. 2 h 03 min, 70.5 g PLA (68.7 g graphite + 1.9 g white), 174 × 126 mm, 74.5 mm tall.

• Levers: standing on their front face (colour only in the first 4 layers), plus 3 SKÅDIS clips (2 + 1 spare) and 3 C-rings (2 + 1 spare). 3 h 57 min, 145.4 g (139.2 g orange + 1.9 g white + 4.3 g graphite), 150 × 158 mm, 60 mm tall.

• Total about 6 h and 216 g.

• Important: the counterweight maths uses the settings in the 3MF (2 walls, 15 % grid infill, 69.6 g per lever). Anything from 10 % to 30 % infill still works (0.79× to 1.62× of the calculated counterweight moment, inside the 0.67× to 1.79× window below), but do not print the levers solid.

Assembly

1. Push the two SKÅDIS clips down into the two pockets at the back of the base.

2. Slide each lever onto its pin, drum outwards, so the small peg goes into the arc slot. Push a C-ring sideways into the groove at the pin tip.

3. Check that both levers rock freely and fall open on their own.

4. Hold the holder about 8 mm higher than its final position, push the clip hooks through two slots of the same row (40 mm apart) and let it drop.

5. Stand the controller on the two feet. Watch the claws.

How it was checked

Physics, computed from the real model: the mass and centre of mass of each lever come from the OpenSCAD geometry with the slicer's walls and infill (66.0 g), scaled to the slicer's own weight (69.6 g per lever). Moments about the pin, in gram-force × mm, at 17 positions from 0° to 16°:

• Counterweight (opens): 1052 (closed) to 1111 (open). Controller (closes): 2200 to 2977 with 200 g, 3080 to 4168 with 280 g (contact of the Ø40 grip on the foot calculated at each angle). Pin friction with μ = 0.4 (deliberately high for PLA on PLA): about 420. The top of the foot passes through the pin axis, so grip-on-foot rubbing adds no moment.

• Empty: opens by itself from any position with at least 912 to spare. With 200, 250, 280 and 300 g: closes from any position with at least 839, 1348, 1653 and 1856 to spare. With 200 g placed 5 mm off-centre it still closes (338 to spare).

• Controls that must fail, and do: with 50 g it does NOT close (744 < 1111, even with no friction); without the counterweight drum an empty lever would NOT open (-200, it tips the closing way).

• Safety window: everything above keeps working if the real counterweight moment is anywhere between 0.67× and 1.79× the calculated one.

• Honest limit: it is a self-centring cradle, not a vice. A sideways push of about 27 g (200 g controller) to 45 g (280 g) on the controller starts opening a claw; let go and it settles back.

Movement and clearances, as intersection volumes in OpenSCAD (manifold) on the real model:

• Levers at 11 positions from 0° to 16°: touch neither base, pins, pegs, C-rings nor each other (0.000 mm³). Control: 1° past either stop the peg hits the slot end (24.0 mm³), so the stops work.

• The controller, placed at the height it really has at each position (it sinks 7.1 mm as the claws close), touches no claw, foot or base (0.000 mm³). Controls: 0.5 mm lower it digs into the feet (21.8 mm³), so it really rests on them; a 160 mm wide controller hits the closed claws (1702 mm³). With the claws open it lifts out and comes forward without touching (0.000 mm³).

• Clearances of at least 0.3 mm: pin grown by 0.3 mm still clears its hole at all 11 positions (0.000 mm³; control 0.45 mm: 416.5 mm³); peg grown by 0.3 mm clears its slot (0.000; control 0.45 mm: 6.9 mm³); lever moved 0.3 mm towards the base or the C-ring touches nothing (0.000; control 0.5 mm: 149.9 and 14.2 mm³).

• SKÅDIS: clip goes in raised 7.8 mm and drops without touching the board (0.000 mm³); controls: a mounted clip cannot be pulled out (90.5 mm³) or go in without lifting (64.1 mm³). Holder touches neither board nor clips (0.000 mm³), clips slide into their pockets (0.000 mm³), holder and clips hang on together (0.000 mm³); control: it cannot come off forwards (231.0 mm³).

• Both plates fit the A1 mini; colours overlap 0.000 mm³.

Español

Soporte para mando de Xbox en el tablero IKEA SKÅDIS que funciona con la gravedad: al dejar el mando, su propio peso baja los pies de dos palancas y las garras se cierran a 2 mm de sus lados; al levantarlo, los contrapesos las abren solas. Cierra con 200-300 g y no con 50 g. Pasadores impresos, sin muelles ni soportes. Dos platos en la A1 mini: unas 6 h y 216 g, 3 colores.

العربية

حامل لذراع تحكم Xbox على لوح IKEA SKÅDIS يعمل بالجاذبية: عند وضع الذراع يدفع وزنه قدمي رافعتين إلى الأسفل فتنغلق المخالب على جانبيه، وعند رفعه تفتحها الأثقال الموازنة وحدها. ينغلق بوزن 200 إلى 300 غرام ولا ينغلق بـ 50 غراما. محاور مطبوعة، بلا نوابض ولا دعامات. صفيحتان على A1 mini: نحو 6 ساعات و216 غراما، 3 ألوان.