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Gantry mechanical troubleshooting — tilt, rotation, slip ring, wedge, slit (by symptom)

Use this page when a gantry mechanical subsystem misbehaves — won't move, moves with abnormal noise, or shows physical wear/damage — and you need to go from what you observe to the probable cause to the fix, without guessing. It covers five gantry subassemblies: tilt drive, rotation drive, slip ring, wedge, and slit.

Applies to

Activion16 (TSX-031A) gantry — mechanical subsystems: tilt drive, rotation drive, slip ring, wedge, slit. Covers mechanical/noise/motion symptoms only; for KGTSM electrical status/alarm codes on rotation, see the related error card.

Steps

6 steps

Source

2D201-112EN*D §1.2 Troubleshooting and repair (pp.34–43): §1.2.1 Tilt, §1.2.2 Rotation, §1.2.3 Slip ring, §1.2.4 Wedge, §1.2.5 Slit

Tools & parts

Item	Part number	Qty
Power cylinder (tilt drive assembly — motor + brake + cylinder)	n/a in source
Tilt microswitch	n/a in source
Gas spring (tilt cover support)	n/a in source
Pillow block (tilt frame bearing)	n/a in source
Rotation drive belt	n/a in source
Rotation drive motor	n/a in source
Rotation servo amplifier (SERVO.AMP)	n/a in source
Main bearing (rotation)	n/a in source
Rotation timing belt	n/a in source
Rotation stopper (transport/service lock)	n/a in source
Slip ring — brush + brush holder	n/a in source
Slip ring — ring surface / insulating ring spacer	n/a in source

Safety

WARNING

Hazard: Gantry rotates/tilts under motor power while you reproduce or listen for the fault

Consequence: entanglement or crush injury to hands, tools, or clothing caught by rotating or tilting parts

Avoidance: clear the bore, tilt path, and covers of people/tools before commanding rotation or tilt; keep hands clear while the drive runs

WARNING

Hazard: Rotation servo amplifier (SERVO.AMP) and the slip ring carry high voltage and stored energy; discharge marks between phases or to GND indicate live arcing

Consequence: electric shock / arc-flash

Avoidance: isolate gantry power and confirm bus discharge before opening covers, touching brush holders, or working the ring surface; treat any discharge trace as a live-circuit finding, not cosmetic damage

CAUTION

Hazard: Sandpapering the slip ring or brushes generates conductive metallic dust

Consequence: leftover residue can bridge phases and re-trigger the discharge fault

Avoidance: clean off all sanding residue and metallic particles before closing covers

NOTICE

Hazard: Forcing manual rotation past a mechanical stop, or forcing a jammed torque-transmission system

Consequence: damage to gearing, pinion/rack, or the mechanical stop itself

Avoidance: stop and identify the obstruction (foreign object, damaged pinion, attached transport/rotation stopper) before applying more force

Full step-by-step for Gantry mechanical troubleshooting — tilt, rotation, slip ring, wedge, slit (by symptom)

All 6 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 steps Adjust the gantry rotation belt tension16 steps Adjust the gantry rotation speed (servo amplifier, VR1)3 steps Adjust the gantry servo-amplifier offset23 steps Adjust the gantry tilt-stop angles (encoder calibration)5 steps Check the gantry rotation speed7 steps

View all Activion16 (TSX-031A) guides

Source: 2D201-112EN*D §1.2 Troubleshooting and repair (pp.34–43): §1.2.1 Tilt, §1.2.2 Rotation, §1.2.3 Slip ring, §1.2.4 Wedge, §1.2.5 Slit. Preview re-authored by FSELIB — the full procedure with figures and steps is in the paid service manual.