A shared base
Both clamping units sit on one base.
Keeping the holders together gives a common reference; access around the joint is another important design consideration.
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02 / Mechanical design
Wire Soldering Jig
Hold the wires. Leave room for the soldering iron. A compact fixture exploring repeatable wire positioning.
Tested project · mechanical design
Why I started
A tool inspired by the ECG build.
After completing my ECG project, I looked back on how awkward the soldering had been. In January 2026, that experience gave me the idea for a wire soldering jig. I wanted it to keep the wire ends aligned and the joint accessible, leaving both hands free for soldering.
The model separates the button, housing, spring, moving jaw and fixed jaw. The STEP view shows their arrangement; the principle illustration below isolates the intended clamp action so it is easier to follow.
How it works
Follow the movement.
Wire positioning / top viewHELD · joint accessible
Motion schematic · not to scale. Wire placement is illustrative. Testing & project record →
- 01
Open
Use the button input to create clearance at the moving clamp.
- 02
Position
Place the wires so their ends meet in an accessible working area.
- 03
Hold
Release the input so the spring can return the clamp toward the wire.
Design record
Read the design through its parts.
Joining two wires means keeping their ends aligned while leaving the joint accessible. This fixture explores how separate clamping parts can support that task on a shared base. The features below describe the current CAD; a comparison of earlier alternatives and revisions is not yet part of the record.
Separate moving parts
Button, spring and clamp are distinct model components.
Button travel, spring return and sliding clearance all affect how the clamp opens and holds.
Room to work
The CAD separates holding areas from surrounding structure.
Wire alignment and access for the soldering iron need to be considered together.
Geometry reference
Read the scale of the parts.
| Feature | CAD value (mm) | What it describes |
|---|---|---|
| Base footprint | 75.4 × 68 | Overall modeled length and width |
| Base height | 10 | Overall modeled base height |
| Individual housing | 25 × 60 × 10 | Bounding dimensions of housing.stl |
Model dimensions in mm: the STEP file defines millimetres, and the matching STL base has the same bounds. These are CAD dimensions, not measurements of a printed part.
Individual parts
Explore the geometry.
Testing & project record
Designed and tested.
Current record
Testing completed by Eason Yang.
Eason has tested this project. The page brings together its design files, CAD dimensions and an illustrative mechanism walkthrough.
- Test record
- Testing is complete. Detailed methods, measurements, observations and supporting media can be added to this record.
- Design / fabrication dates
- The idea dates to January 2026. CAD completion and fabrication dates have not yet been recorded.
- Author’s process
- Alternatives, revisions and the boundary between references and Eason’s own design remain to be documented.
- Tools & references
- The original design software and any tutorials or source designs have not been identified in this record.
Document the completed testing
Add the setup, method and observations from the testing already completed.
Setup and holding
Add the wire sizes and setup used during testing, with observations about positioning and holding.
Operation
Add observations from testing the button and clamp, with photographs or a short demonstration where available.
Observations and revisions
Describe working access and handling during testing. Include any changes made and the reasons for them.
Project files
Take a closer look.
The STEP file contains the assembly. Six STL files provide individual part geometry; the 3MF project is also included.
Complete model set
6 STL · 1 STEP · 1 3MF · 287.6 KB · original filenames inside the ZIP
| Part / file | Format | Size | Download |
|---|---|---|---|
| Button按.stl | STL | 19.2 KB | Download ↓ Button |
| Housing壳.stl | STL | 46.8 KB | Download ↓ Housing |
| Spring弹簧.stl | STL | 114.7 KB | Download ↓ Spring |
| Moving jaw动.stl | STL | 30.9 KB | Download ↓ Moving jaw |
| Base底座.stl | STL | 44.4 KB | Download ↓ Base |
| Fixed jaw定.stl | STL | 16.3 KB | Download ↓ Fixed jaw |
| STEP assembly夹子.stp | STP | 665.6 KB | Download ↓ STEP assembly |
| 3MF project焊接夹.3mf | 3MF | 124.5 KB | Download ↓ 3MF project |
Individual downloads retain the original model bytes. File inventory & checksums ↓