What the thread found

• The 3-pin connector on the bottom of the Axis is output only, not input, as confirmed by direct testing.
• Options include a Sharkfin battery holder with two batteries mounted below, a Sharkfin with battery on one side and dummy plate on the other connected to a block battery on a cable, a dummy Gold Mount plate with 4-pin XLR socket, direct power feed at the Gold Mount connector input, or D-Tap adapter cables from the sled connector to external power supply or large capacity battery.
• Cable routing near the gimbal pivot is critical: lead cables from the camera at top stage around the tube to the gimbal hand, then along the arm; routing cables at the sled base or far from the pivot introduces unwanted lever action that motors must correct, severely degrading operation.
• Classical method routes the cable from the gimbal exit with a long loop (approximately two-thirds sled length) to the vest or shoulder; cable twist causes most damage.
• Multiple batteries mounted below without balancing weight above shifts the gimbal to an unfavorable position on the post.
• Broadcast style routes a block battery cable from the camera along the sled to the handle and arm, enabling all-day operation; secure the tripod with sandbags before mounting the sled.
• One operator advocates Sharkfin battery at the sled as preferable to any external cabling, since each cable complicates operation; others favor external cable-based systems to avoid bottom weight and gimbal imbalance.

Depends on

• Sharkfin on sled vs. external power delivery—no consensus reached.
• Optimal cable routing depends on specific sled geometry and camera weight.
• All-day operation feasibility depends on total battery capacity and power draw.

Parts

Top Stage, Hard Mount

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