Filament Drybox Inomata-K Mk2 for SwitchBot Thermohygrometer

*A remix of the “Inomata-K Mk2” designed to accommodate the SwitchBot Thermo-Hygrometer (SwitchBot Meter THS1), featuring a silica gel container for keeping filament dry.

I had some doubts about the accuracy and reliability of the inexpensive thermometers and hygrometers commonly used in these setups, and I also wanted to log humidity data. So, I modified the original model to accommodate a SwitchBot Thermo-Hygrometer (SwitchBot Meter TH S1).

There was also some unused space beneath the spool, so I took the opportunity to design a removable and replaceable silica gel container.

The holder base is a modified version of proko's remix, redesigned to allow the base to be secured using a 3D-printed screw.

Since the original model didn't include a mounting part for the PTFE tube and pneumatic connector, I also designed a larger mounting bracket to help reduce stress on the lid and minimize the risk of fatigue failure.

All parts are provided in STEP format, so feel free to modify and customize them to suit your needs, in accordance with the Creative Commons license.

Print Settings

• Supports: None

• Wall Loops: 4–5

• Infill Density: 10% or higher recommended

I printed mine in ABS.

Required Parts：

The following parts from the original model are required：

• Dry_IK_02_Shaft: x2

• Dry_IK_02_Lock_key: x1

• Dry_IK_02_Lock(or Dry_IK_02_Lock_clr01): x4

• Dry_IK_02_Roller-2: x2

• 608 Bearings: x4

• PTFE tubing OD4:  (length as needed)

Additional parts for this remix：

• All printed parts included in this remix

• SwitchBot Thermo-Hygrometer (SwitchBot Meter TH S1): ×1

• M3×12 countersunk screws: ×3

• M3 nuts: ×3

• Pneumatic connector (PC4-M10, 1.0 mm thread pitch): ×1

• 10×2 mm round magnets: ×8

• Small amount of adhesive.

Assembly：

Silica gel Container and Base：

1. Apply a small amount of adhesive into each magnet hole in THS1_Dry_IK_02_Silica_container and THS1_Dry_IK_02_base.

2. Stack two 10×2 mm round magnets together and press the stacked pair into each magnet hole on the bottom of THS1_Dry_IK_02_Silica_container.

3. While keeping the magnets stacked, align the container with the corresponding holes in THS1_Dry_IK_02_base and press the two parts together. Allow the adhesive to cure completely.
   

*Notes:

• The container holds approximately 120 g of silica gel.

• A snap-fit sliding lid prevents the silica gel beads from spilling out.
  

Main Body：

1. Fit THS1_Dry_IK_02_base and THS1_Dry_IK_02_Side_* together, installing the SwitchBot Meter at the same time.

2. Install the rollers and other components following the same procedure as the original model.
   

   

   

   
   
   *Note: The battery can be replaced and the pairing settings can be accessed from the back without disassembling the unit.
   

PTFE Tube Mounting Bracket：

1. Position THS1_Dry_IK_02_Pneumatic_i on the inside of the container lid. Using double-sided tape makes positioning easier. Adjust its location to suit your preferred filament routing.

2. Drill four holes through the lid at the marked positions.

3. As shown in the illustration, install the pneumatic connector (PC4-M10, 1.0 mm thread pitch) ×1 and M3 nuts ×3 into THS1_Dry_IK_02_Pneumatic_o.

4. Secure the bracket using three M3×12 countersunk screws inserted from the underside of the lid, then feed the PTFE tube through the connector.

■All Done!