2017Operating forum
Balancing and tuning a non-isoelastic steadicam arm for smooth handheld operation
What the thread found
- A camera that is too light for an arm can cause bouncing and instability; adding weight plates improves performance by increasing inertia and reducing wiggle.
- Non-isoelastic arms will exhibit some arm segment drift during operation where one segment tends to move toward full extension or full retraction over time; this is expected behavior for this arm type.
- Static balance achieved with the camera attached and dynamic balance verified through spin testing is the correct approach to tuning a rig.
- Arm spring tension should be set loose enough to allow smooth operation without the arm locking up at the limits of travel in either direction.
- Drop time of 3 to 3.5 seconds works well as a starting point for this arm configuration.
- Step-through and vertical bounce from operator footfalls will remain visible with this non-isoelastic arm even after proper tuning; this is a limitation of the arm design rather than operator technique.
Depends on
- The Provid arm with the old socketblock is not isoelastic, which fundamentally limits how smooth it can perform compared to higher-end isoelastic arms.
- These findings are based on a specific configuration: approximately 10 kg total payload with a 35mm camera body, a 24mm prime lens, monitor, and battery plate.
- The operator was self-taught at the time of the discussion and had not yet attended professional training.
- Adding weight to achieve better performance means the rig becomes heavier to carry and manage during operation.