ProcedureGantrySetup & CalibrationEmergency

Release the gantry rotation brake to turn the rotation section by hand (emergency)

Use this when the Activion16 gantry rotation section must be turned by hand — for service work, or when the X-ray tube is not at its normal stop position and the powered recall (via the operating panel) is not available. There are two ways to reposition the rotation section: a powered recall to the home position (normal use, needs the console active) and a manual brake release (service/emergency u

Applies to
Activion16 (TSX-031A). Manual brake release is a service/emergency operation on the gantry rotation drive; no rotation-variant restriction is noted in the source for this task.
Steps
9 steps
Source
2D201-112EN*D §3.7.1 (p.254-255) — Stop position and methods for brake release

Tools & parts

ItemPart numberQty
None — uses the gantry's own breakers/switch (CP1, CP320, SW326, NFB2)n/a in source—

Safety

WARNING

Hazard: Attempting to turn the gantry rotation section by hand while the servo amplifier breaker CP320 is still ON

Consequence: (derived - not in source) The rotation motor still has power and can fight or drive the manual turning, risking injury or drive/brake damage

Avoidance: Always set CP320 to OFF (Step 2) before releasing the brake at SW326 — the source states Step (2) is mandatory to ensure safety

CAUTION

Hazard: Rotor-side electronics (HFG, DAS, etc.) left powered while the rotation section is opened up for manual turning

Consequence: (derived - not in source) Unnecessary exposure to live rotor electronics during service work

Avoidance: If power to the inside of the rotor is not needed for the task, also set breaker NFB2 (rear lower right of the gantry) to OFF (source: 'be sure to set breaker NFB2 ... to OFF')

NOTICE

Hazard: Turning the gantry rotation section by hand without first releasing the brake at SW326

Consequence: Brake malfunction / damage to the brake mechanism

Avoidance: Always complete the brake release procedure (CP1 ON, CP320 OFF, SW326 up) before turning the rotation section manually

Full step-by-step for Release the gantry rotation brake to turn the rotation section by hand (emergency)

All 9 steps are documented in the FSELIB Activion16 (TSX-031A) service manual — re-authored, web-first, with the real figures from the source.

Open the full procedure

Related Gantry guides

Adjust the gantry positioning projectors (side, slant, and median)10 stepsAdjust the gantry rotation belt tension16 stepsAdjust the gantry rotation speed (servo amplifier, VR1)3 stepsAdjust the gantry servo-amplifier offset23 stepsAdjust the gantry tilt-stop angles (encoder calibration)5 stepsCheck the gantry rotation speed7 steps
View all Activion16 (TSX-031A) guides

Source: 2D201-112EN*D §3.7.1 (p.254-255) — Stop position and methods for brake release. Preview re-authored by FSELIB — the full procedure with figures and steps is in the paid service manual.