material
Armature
Puppet
Definition
An armature is the internal, poseable skeleton of a stop-motion puppet. It holds a pose between frames and gives the animator repeatable, controllable movement, ranging from inexpensive twisted-wire structures to machined ball-and-socket assemblies and increasingly bespoke printed or mechanically geared systems.
Overview
An armature is the part of a puppet that the camera normally never sees but the animator depends on for every frame. Wire armatures -- usually twisted aluminium or steel -- are inexpensive and fast to build, but repeated bending work-hardens the metal until it eventually fails. Machined ball-and-socket armatures cost more and take longer to fabricate, but their joint tension can be tuned and re-tightened, making them better suited to long productions where a puppet must survive thousands of controlled adjustments without drifting out of pose.
The useful design rule is not to reproduce human anatomy literally but to engineer only the movement the character needs. Ken A. Priebe documents Bronwen Kyffin's plug-in wire-armature system using nested K&S brass tubes, set screws and replaceable wire limbs, with heavier gauges where the puppet carries load and thinner wire for arms and fingers. In a separate ball-and-socket example, Priebe describes sandwich-plate joints -- paired metal plates clamped around a ball bearing -- and smaller U-joints used where the range of motion is narrower. The joint type changes with the required movement rather than being standardized across the whole puppet.
Professional armatures increasingly mix traditional machining with newer fabrication methods. Mackinnon and Saunders' puppets for *Guillermo del Toro's Pinocchio* used armatures engineered by Richard Pickersgill that combined traditional armature-making knowledge with 3D-printed metal components. Puppet supervisor Georgina Hayns describes the production as testing metal alloys specifically for skeleton use, while also documenting a failed eye mechanism whose movement pulled against the surrounding silicone skin. A mechanism that works perfectly while bare is not necessarily production-ready once skin, costume and external forces are added.
LAIKA's *Wildwood* gives a recent feature-production example from the armature department itself. In a timestamped featurette transcript, LAIKA lead armaturist Matt Cole describes the workflow as moving from CAD design through mill machining and assembly, using ball-and-socket joints and hinges to make the small skeletons inside puppets. At 00:49–00:58 he says the *Wildwood* team had to engineer quadrupeds whose movement also conveyed animal musculature and expression. Around 01:08–01:18 he describes the horse armature as a highly complex mechanism using gears to drive movement and specialized joints for rotation; at 01:18–01:25 he states that appearance and animator performance were equally important requirements. LAIKA's own current profile for Cole independently identifies him as Armature Lead and connects him to the horse puppets. This is the feature-scale version of the same principle seen in smaller builds: design the skeleton around the performance the animator must produce, then test the mechanism as part of the complete puppet rather than as an isolated engineering object.
The machined skeleton was not the starting point. In 1946 Ladislas Starevich described his own "ciné-marionnettes" in a text that Thomas Beaufils reproduces in the conservation journal *Déméter* (2021). The body was a support figure cut from light wood and fitted with hinges, rigid enough to hold any position. Cotton built up the muscles, and chamois leather covered the hands and limbs. The fingers were lead wire moulded over with cotton. The head was carved from wood or cork, with a hinged jaw and balls set into the eye sockets. Fine pins in the feet fixed the puppet to a wooden or cork base, which is an early form of the [[tie-down]].
Starevich also scaled the cast to the shot: about 35 cm for medium shots, 5–10 cm for crowds in distant shots, and occasionally life-size for close-ups. Stop Motion Magazine's 2026 documentary on him shows a surviving articulated wooden hand and a *La Cigale* puppet with wire exposed at its joints. It also cautions that one written account does not prove every puppet used the same mechanism. The design logic is still clear. Hinged wood went where a pose had to hold, and soft lead wire went where the fingers needed fine adjustment. That is the same choice of joint by required movement that later wire and ball-and-socket armatures make.
The same LAIKA production also marks the small end of the range. Head of character and practical effects Oliver Jones told Skwigly (2026-10-23) that Septima, a mouse riding on a lead character's shoulder, would conventionally have been built as an overscale puppet about ten inches tall and shot to look small. Instead the team built what Jones calls the studio's smallest animatable puppet: barely an inch tall, with a fully articulated armature on a cast-bronze chest block, ball-and-socket shoulders and waterjet-cut limbs, animated with tweezers. The choice shows that scale is itself an armature decision. Overscale avoids the problem by making a small character physically large enough for ordinary joints and hands; building at true scale means switching to dense materials and precision-cut parts small enough to fit, and accepting that animators need tools to pose them.
Workflow
- 1. Define the character proportions and the exact range of motion required by the shots before choosing joints.
- 2. Select the armature family for the production: wire for inexpensive or shorter-lived builds, machined ball-and-socket for durable repeatability, or bespoke printed/mechanical structures where the production justifies the engineering cost.
- 3. Design each joint around its required motion rather than applying one joint type everywhere; reserve freer ball-and-socket movement for areas that need it and simpler pivots or hinges where the motion is constrained.
- 4. Build and test the skeleton bare, checking that every joint holds a pose without creep and that removable or serviceable parts can be accessed.
- 5. Add tie-down or stage-attachment points where the puppet must be fixed to the set.
- 6. Test again after body, skin, hair and costume are installed. External materials can restrict movement or defeat mechanisms that function correctly when bare.
- 7. For complex animal or mechanical puppets, test the full animator-facing performance -- not only engineering travel -- under the real camera and set conditions before finalizing the build.
- 8. For very small characters, decide early between an overscale puppet shot to look small and a true-scale build. True scale needs dense, precisely cut parts and tool-assisted posing, so prototype one joint before committing the whole cast.