TroubleshootingGantryTroubleshootingTroubleshoot

Troubleshoot the Activion16 gantry rotation section

Use this when the rotation section won't turn, makes abnormal noise, rotates unevenly, or trips the rotation servo's overload relay. Work top-down: find the malfunction that matches what you're seeing, run the listed check, and go straight to the matching fix. Several branches bottom out in "call Toshiba Nasu Operations" — that's the source manual telling you the cause needs factory/ depot-level s

Applies to
Activion16 (TSX-031A) — gantry rotation drive only (motor, timing belt, main bearing, rotation servo amplifier, KGTSM control). For tilt, slip ring, wedge, or slit-section faults, see the sibling trees (§1.2.1 / §1.2.3 / §1.2.4 / §1.2.5) under Related.
Steps
0 steps
Source
2D201-112EN*D §1.2.2 (pp.37-39) — Troubleshooting and repair of the rotation section; safety callouts cross-referenced from §2 Safety Precautions (pp.5-11)

Tools & parts

ItemPart numberQty
Rotation-drive timing beltn/a in source
Rotation-drive motor (R-motor)n/a in source
Rotation servo amplifier (SERVO.AMP)n/a in source
Rotation-section connector(s)n/a in source
Main bearing (rotation section)n/a in source
Rotation-section cable(s)n/a in source
Slip-ring brushn/a in source

Safety

DANGER

Hazard: Gantry serviced with power live / covers open

Consequence: electric shock or injury from unexpected system operation

Avoidance: turn OFF system power at the distribution board and wait ≥5 minutes before opening covers to inspect the rotation drive

WARNING

Hazard: Rotation section can rotate suddenly during inspection

Consequence: a worker caught in the rotation section can be seriously injured, especially if a part has been removed and the assembly is now unbalanced

Avoidance: engage the rotation mechanical stopper before removing any rotation-section part, and use the cover switch / CP320 / rotation lock pins to block inadvertent rotation while servicing

CAUTION

Hazard: Manually rotating the drive with the brake still applied

Consequence: system malfunction in the rotation drive

Avoidance: always release the brake before turning the rotation section by hand

DANGER

Hazard: Slip ring (LCSR) and brush section carry hazardous voltage

Consequence: electric shock

Avoidance: do not remove the rear dome cover live; turn OFF all breakers on the distribution board before touching the slip ring or brushes, and do not restore power with the rear dome cover off

CAUTION

Hazard: Cycling SW320 while the gantry is rotating

Consequence: damage to the servo amplifier

Avoidance: never switch SW320 ON/OFF during rotation — use CP320 to remove power from the rotation servo

Full step-by-step for Troubleshoot the Activion16 gantry rotation section

All 0 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 §1.2.2 (pp.37-39) — Troubleshooting and repair of the rotation section; safety callouts cross-referenced from §2 Safety Precautions (pp.5-11). Preview re-authored by FSELIB — the full procedure with figures and steps is in the paid service manual.