Bin frame — Bottom interface

Bottom interface

How-to guide

The component the chute rests on top of.

Author Spencer

Parts needed

Bearings

Lazy Susan

Printed parts

Lazy Susan chute mount
Lazy Susan bottom static
Lazy Susan washer

Screws

8×
M4 × 12 mm countersunk screw

Lazy Susan chute mount: Prepared with 4× M4 Ruthex long heat inserts.
Lazy Susan bottom static: Prepared with 4× M4 Ruthex long heat inserts.

The bottom interface stacks the chute mount, a spacer ring, the Lazy Susan bearing, and the bottom static part. Here it is exploded into its components:

Exploded view of the bottom interface: chute mount on top, spacer ring, Lazy Susan bearing, and the corner mounting brackets below

Close-up exploded view of the bottom interface parts separating from the mounting brackets

Once assembled, it mounts into the machine frame:

The bottom interface assembly mounted into the aluminum extrusion machine frame — Diagram pictures courtesy of Adrianbaker in the basically Discord.

Step 1 Mount the Lazy Susan to the chute mount

Set the spacer on the chute mount and the Lazy Susan on top. You need to remove the Lazy Susan's rubber tabs first (see Preparing Lazy Susan). Line up a screw hole with a heat insert in the chute mount and drive the screw. Repeat around the disc.

Lining up the first screw hole with the chute mount's heat insert

The Lazy Susan is two discs, inner and outer, that spin independently. One disc's screws go in from above, the other's from below. The chute mount and the bottom static part both have access holes lined up with the bearing, so you can reach both sides to drive the screws.

The M4 × 12 mm countersunk screws must be very tight. Most electric screwdrivers won't tighten them enough. They're a hassle to reach if they come loose, and machine vibration can work them loose.

Lazy Susan bearing mounted on the chute mount with the spacer between them

Step 2 Mount the Lazy Susan to the bottom static part

The Lazy Susan's other disc screws down into the bottom static part. You reach those screws through a pass-through hole in the chute mount.

Lazy Susan hole aligned with the pass-through hole, seen from the top — Holes lined up. You can see through to the chute mount.

Pass-through hole in the chute mount with the screw reachable underneath — The pass-through hole lets a screwdriver reach the screw.

Set the chute mount + Lazy Susan assembly onto the bottom static part and line up the pass-through hole with the marked heat insert (red square).

Placing the chute mount and Lazy Susan assembly onto the bottom static part

Pass-through hole lined up over the heat insert, marked with a red square — Line up over the marked hole (red square).

Drive the first screw through the pass-through hole.

First screw driven through the pass-through hole

Then rotate the chute with the Lazy Susan, turning it the way it turns in normal operation, not by forcing the whole assembly, to bring the pass-through hole to the next insert. Repeat for all four screws.

Rotating the chute with the Lazy Susan to the next screw position

Pass-through hole lined up over the next heat insert after rotating — Pass-through hole now over the next insert.

The finished bottom interface:

The completed bottom interface with chute mount, Lazy Susan bearing, and bottom static part assembled