Build panels and enclosures that actually fit

Start with components and reference dimensions

Lay out the switches, encoders, display, board and actual connectors. Record depth, threaded portions, anti-rotation features, mounting holes and connector clearance as well as the visible outline. Compare supplier drawings with the delivered parts. Two similar housings can have different mounting centres.

Choose one reference edge for hole positions. Mark front, rear, material thickness and revision. Leave space for nuts, washers and tools, and check whether neighbouring components collide behind the panel. Treat a display’s visible area, outside dimensions and mounting points as separate measurements.

1. Print a full-size paper template and measure a known reference dimension.
2. Place the controls on it and try reaching them from your normal seat.
3. Allow cable space and a removable cover.
4. Release the manufacturing design after checking the fit.

Match the process to the part

A flat faceplate, a shaped knob and a structural bracket do different jobs. They need not use the same material. A small machine can produce useful cockpit parts when its working area, tooling and material capability match the design.

Acrylic is not a universal laser specification. Colour, composition, manufacturing method and wavelength affect the result. A power label such as “10 W” alone does not establish that a laser can cut clear acrylic. Check the exact material and process.

Separate the CAD model, drawing and machine job

Keep editable dimensions in CAD and describe the required result in a technical drawing. STEP commonly transfers solid geometry; STL is a triangle mesh whose intended units must be agreed. DXF or SVG often carries flat profiles. None of these formats automatically supplies a suitable machine program.

After importing, check a reference dimension and remove duplicate paths. Put cutting, engraving and construction geometry on clearly named layers. Store the source model, export and revision together. Changing a display opening must update both the drawing and manufacturing file.

Fusion combines design and manufacturing tools, but personal use has eligibility and feature restrictions. It is not a general free commercial licence. Check current terms for your project. With any alternative, also consider export support, learning time and a suitable postprocessor.

Print the critical feature before the complete part

For a knob, first print only the section holding the shaft, screw and insert. This tests assembly without spending a full print on the outer shape. An enclosure also needs clearance beneath the PCB and around plugs. Tightened screws must not touch tracks or components.

Layer direction matters for loaded brackets. A neat prototype is not evidence that a pedal or seat support can withstand its intended load. Choose geometry and material for the actual forces and temperature; PLA and PETG are not interchangeable strength ratings. Prusa’s design guidance explains why there is no universal fitting allowance.

For a measured 6.0 mm mating part, a sample might contain holes designed at 6.1, 6.2 and 6.3 mm. These are trial values, not a prescription. Label and measure the prints, then choose the fit you need. Reuse the result only with the same material and process.

Design for workholding and cutter access

A CNC router needs secure workholding, clear toolpaths and a repeatable datum. Check access inside pockets and around clamps. A round cutter cannot produce a sharp internal corner: a 3 mm cutter has a geometric radius of at least 1.5 mm. A square switch body may require corner relief or finishing by hand.

Prepare CAM for the actual machine and tool. Check stock, work offset, depth increments, clearance and postprocessor. Include clamps when reviewing the toolpath. Feed and speed must suit the cutter, material and machine rather than a photograph of somebody else’s panel.

Make a sample containing the critical hole, pocket and lettering detail. Measure it and inspect burrs or distortion. If the tool chatters or the stock moves, find the cause before continuing. For an occasional panel, an outside machining service may be more practical than another machine.

Prepare repeatable labels in LightBurn

Check laser, controller and material suitability. Do not experiment on unidentified plastics or coatings; PVC is unsuitable. Use the enclosure, extraction and protection specified for the equipment, and supervise the running laser. The LightBurn safety guidance complements the machine manual.

Separate cut paths from lettering, check dimensions and closed outlines, and remove duplicate lines. Compare the preview with the intended result and verify job origin and placement. A small material test grid lets you compare settings on the actual material before processing the panel.

Test backlit labels both illuminated and unlit. Deep engraving can weaken the sheet or spread light where it is unwanted. Keep material details, coating, focus, settings and a physical sample together. Another builder’s attractive result is not a transferable recipe.

A power test alone does not establish dimensional fit. Measure the kerf and suitable kerf offset on a sample using the same material and process. Apply compensation in the appropriate direction for inside and outside contours, then measure a trial fit. Scaling the complete drawing is not a substitute for targeted kerf compensation.

Develop a PCB from a proven circuit

Start with the schematic, component choices and voltage requirements. Check footprints against datasheets: pin 1, connector viewing direction and hole positions matter. A correctly named signal can still be physically connected to the wrong pad. Include mounting and cable access in the panel’s mechanical design.

Run ERC on the schematic and DRC on the layout. Also check intended connectivity, unconnected nets, copper spacing and suitable traces. Passing automated checks does not prove function or current capacity. The KiCad introduction separates these stages.

Open the exported Gerber and drill files in a viewer before ordering. Check outline, holes and markings. A suitable ready-made controller can remove PCB design from your workload, while mounting, wiring and power remain. Our own boards are currently development products.

Finish with measurable acceptance checks

For an outside supplier, specify material, thickness, quantity, revision, units, critical dimensions and finish. Agree which dimensions matter most and how deviations are assessed. An STL file on its own does not answer all manufacturing questions.

Mechanical acceptance means parts fit without undue stress, controls move freely, labels are readable and maintenance remains possible. Electrical commissioning follows separately through wiring and connection checks.

Work through the next fabrication question together

We also help with 3D printing methods, CNC routers and laser work with LightBurn in the forum. Include the intended result, material, machine, dimensions and a picture or sketch of the problem. That helps distinguish a design issue from workholding or process settings.

We aim to offer a useful next step the same day where possible; late-evening questions may receive a later reply. A documented test piece also helps the young Cockpit Suite community. Practical workshop experience is valuable as we grow in Europe, and contributions from other regions are equally welcome.

Continue with a practical build