Designing Custom FPV Camera Mounts with Fusion 360: CAD to 3D Print Workflow

Every FPV pilot eventually encounters a camera mounting problem that off-the-shelf parts can’t solve — an unusual frame geometry, a non-standard camera, or a specific tilt angle that no commercial mount supports. Designing your own camera mount in Fusion 360 is the solution, and it’s more accessible than most pilots assume. This step-by-step tutorial walks through designing a custom FPV camera mount, from initial measurements to the final 3D print.

Step 1: Gather Measurements and Reference Geometry

Start with a digital caliper and measure everything: the camera body width, height, depth, and lens protrusion; the mounting hole spacing on your frame; the distance between standoffs; and the available clearance for tilt adjustment. Most camera manufacturers publish dimensional drawings — search for “[camera model] dimensions” or “[camera model] CAD” to find official specifications. Download the STEP file for your frame from the manufacturer’s website and import it into Fusion 360 as reference geometry. This gives you exact mounting point locations and prevents clearance errors.

Key measurements for common FPV cameras: the DJI O4 camera measures 25.5×25.5×22.5mm with M2 mounting holes on 20mm centers. The Walksnail Avatar HD camera is 19×19×19mm. The Caddx Ratel 2 is 19×19×19mm with a standard “nano” mounting pattern. Older RunCam Phoenix and Caddx Baby Ratel cameras use the “micro” form factor at 19×19mm (width) × variable length. Check your specific camera’s datasheet before starting.

Step 2: Create the Camera Pocket

In Fusion 360, create a new component named “Camera Mount.” Start with a sketch on the XY plane and draw a rectangle matching your camera’s width and height plus 0.3mm clearance (a press fit shouldn’t be exact — thermal expansion and print tolerances need accounting for). Extrude this to the camera’s depth plus 2mm for the back wall. Shell the resulting body to 2-3mm wall thickness, leaving the front face open.

Add a slot or hole for the lens to protrude through. For a typical micro camera, this is a 14mm diameter circle centered on the front face. For digital cameras with multiple lens elements, create an elongated slot that accommodates the entire lens assembly. Add a clamping feature: a small bridge of material across the top or front with M2 bolt holes that squeezes the camera body when tightened. The clamp should provide enough compression to hold the camera during aggressive flight but not so much that it deforms the camera housing.

Step 3: Design the Frame Interface

The mount must interface with your specific frame. Most frames use M3 standoffs in a 30.5×30.5mm or 25.5×25.5mm square pattern (standard flight controller mounting dimensions). Create mounting ears that extend from the camera pocket to these standoff locations. Use 3.2mm holes (M3 clearance) with a 6mm outer diameter boss for structural reinforcement. If your mount needs to bridge between front and rear standoffs, add gussets at the joints to prevent fatigue cracking.

Add a tilt adjustment mechanism. The simplest approach is a pivot: two coaxial M2 or M3 holes through the mount body and frame side plates, allowing the mount to rotate. A curved slot with a clamping bolt provides infinite tilt adjustment within a range (typically 15-45 degrees for FPV cameras). For fixed-angle mounts, simply design the camera pocket at your desired angle relative to the frame mounting plane. Most freestyle pilots prefer 20-30 degrees; racers may want 40-50 degrees.

Step 4: Add Impact Protection Features

A well-designed camera mount protects the camera from frontal impacts. Extend the mount body forward of the lens by 2-3mm, creating a “bumper” that takes the hit before the lens glass. Add sacrificial features: thin sections of material designed to break on severe impact, absorbing energy that would otherwise transfer to the camera. These can be small connecting bridges between the main mount body and the lens hood that shear off cleanly in a crash. Add a zip-tie slot or secondary retention feature — if the clamp fails, the camera should be retained by a secondary mechanism rather than ejecting from the quad.

Step 5: Export and Print

Export the design as an STL or 3MF file. In your slicer, orient the part to maximize strength: layer lines should run perpendicular to impact forces (typically vertical layers for a mount that takes frontal impacts). For TPU, use 3-4 walls, 25% gyroid infill, 0.2mm layer height, and print at 20-30mm/s with the fan at 30-50%. For PETG structural mounts, use 3 walls, 30% infill, 0.16mm layer height for finer detail on mounting features, and print at 50-60mm/s.

Install your printed mount, verify camera alignment (the horizon should be level in your goggles with the quad flat), and tighten all fasteners with a dab of blue Loctite. A custom camera mount is a small part with an outsized impact — it positions the single most important sensor on your quad exactly where you want it, at exactly the angle you fly. The ability to design and print these components yourself is one of the most empowering skills in FPV building.