Truss manipulators run continuously at high cycle rates and heavy loads, so guide rails, racks, servo motors and grippers all wear and lose accuracy over time. Most failures do not happen suddenly; they are the accumulated result of skipped daily inspections. Instead of repairing after a breakdown, it pays to build a maintenance routine that people actually follow. Below are the inspection points and preventive measures for six key systems.

Guide rails and racks are the basis of motion. Clean chips and dust from the rail surfaces and rack teeth every shift, and check that grease is evenly distributed. Every week, listen for abnormal noise or stick-slip in the carriages and measure whether rack backlash has grown. If a rail shows a bright patch or slight scoring, deal with it immediately before local damage spreads into large-area wear.

Servo and transmission systems determine whether accuracy holds over time. During operation, listen for smooth motor sound and watch for abnormal vibration or temperature rise. Every month check belt tension, coupling bolts and any oil leakage on the reducer. Machines with dual-drive synchronisation also need regular checks of position deviation between the two sides, because excess deviation increases beam torsional deformation and directly affects positioning accuracy.

Grippers and end effectors decide pick-and-place reliability. Confirm air pressure and vacuum level every shift, and inspect suction cups and jaws for wear and sealing. In welding or grinding cells, clean spatter and dust from the tooling regularly so that contaminated locating faces do not cause offset placement or dropped parts.

Lubrication and protection are easily overlooked but decisive for service life. Replenish or replace grease at the interval stated in the manual, and shorten it in dusty workshops. Check bellows and protective covers for damage, and make sure cable carriers move freely without excessive wear, which otherwise leads to fatigue breakage and sudden downtime.

Electrical and safety circuits must stay responsive. Periodically verify limit switches, emergency stops and safety-door interlocks, and clean cabinet filters and cooling fans to prevent high-temperature drive alarms. After replacing any safety component, re-validate the interlock logic instead of only powering up the machine.

Spare parts management is part of the maintenance system too. Keep a sensible stock of wear items such as carriages, timing belts, suction cups and limit switches, so a failed part can be replaced at once instead of waiting for delivery. Adjust the list according to actual consumption rather than copying a supplier recommended kit.

The core of prevention is record keeping. Build an inspection checklist and service file for each machine, and track trends in noise, temperature and accuracy deviation so that planned maintenance can be scheduled before a failure occurs. Truman supports customers with periodic inspection, spare parts supply and remote diagnostics to keep production lines running steadily over the long term.