See the KRT Manual for most build resources, including specific guidance and tips.
Material Library
The current list of materials for which there are CNC files available in the Downloads.
Flat-Pack Trainer Materials
Sheet materials for the 3LS and 5LS trainers. To be cut by CNC router.
| ID | Description | True Thickness | Router Bit Diameter* | Acceptable Thickness | 3D Model Router Bit** | 3D Model Sheet Thickness** |
|---|---|---|---|---|---|---|
| A | 1/2″ Plywood | 0.472-0.475” | 1/4” (6mm) | 0.47-0.48” (11.9-12.2mm) | 0.255” (6.48mm) | 0.4874” (31/64”) (12.38mm) |
*The router bit mentioned here is the main bit used for all the perimeter cutting, additional bits are used for other features, as specified in drawings 3LS-41 and 5LS-41
**The actual router bit and sheet thickness values used in the Autodesk Fusion parameters ensure the parts can be assembled easily and that tool paths can be generated in the dog bone corners
Other Materials
Materials to be cut by CNC laser or waterjet.
| ID | Material | Thickness | Used For |
|---|---|---|---|
| AA | Aluminum | 1/8″ (3mm)* | Metal plate parts for 3/5LSQ trainers |
| BB | Steel | 1/8″ (3mm)* | Batten load parts for all trainers (lighting fixtures, scenery) |
| CC | Steel | 1/2″ (12-13mm)* | “Full” brick counterweights |
| DD | Steel | 1/4″ (6mm)* | “Half” brick counterweights |
| EE | Steel 14ga | 0.78″ (1.98mm) | Sheet metal versions of pulley block side plates |
*The exact conversion for the imperial value is not given (the indicated mm thickness is acceptable)
Links
3D-Printing
- How does a 3D printer work? by Jared Owen (YouTube)
- PrusaSlicer – Open-source slicer software by Prusa Research
- Print Quality Troubleshooting – Support article by Prusa Research
- YouTube Channels:
Maker’s Muse, CNC Kitchen, 3D Printing Nerd, Slant 3D, Chris Riley, Teaching Tech, The Next Layer, 3D Printer Academy
Nesting and Cut optimization
- Deepnest.io – Open-source nesting software
- CutLogic 1D – Linear cut list optimizer software by TMachines
Calculators
- Desmos Scientific Calculator – Online calculator
- Feet & Inch Construction Calc – Phone app for fractional calculations and much more
- BlockLayer.com – Calculators for builders
References
- Fraction-Decimal-Millimeters Conversion Chart by MFG Tray
- Fastener Information by Bolt Depot – Printable reference charts
- CNC Sheet Cutting Guidelines and Best Practices by SendCutSend
- PaperSizes.io – Useful reference for comparing standard paper sizes