Why a Claw Machine Isn’t as Simple as It Looks？
Hi everyone, this is YUTO. A claw machine may look simple, but its smooth performance depends on gears, sensors, and control logic working in sync. Keep an eye on three checks: mechanical stability, accurate sensor feedback, and responsive control actions. With these in shape, the machine runs on precision — and that’s where good maintenance starts.
Maintenance Essentials
Under YUTO’s standardized after-sales workflow, every maintenance session follows: check → clean → test.
Crane & Gear
Power off the machine before entering the maintenance zone.
Inspect crane rails and confirm all four movement directions operate without resistance. The crane travels through micro-switch limits; once the switch is triggered, the motor must stop immediately — any delay indicates switch wear or misalignment.
Check gear teeth for wear and confirm the gear set engages properly; misaligned gears often appear as jitter, abnormal sound, or inconsistent claw return.
Wipe off old grease, re-lubricate sliding rails, and tighten the four chassis foot screws and any rail fasteners.
After lubrication, run a short test: the crane should move smoothly in all directions with no vibration or grinding noise.
Micro Switch
Micro switches are critical because they define the crane’s limit positions, startup detection, and the claw’s up/down stop points.
Inspect terminal contacts for looseness or oxidation and check the actuator for proper spring feedback.
Use a multimeter to verify stable signal change when pressed — the tactile “click” must be crisp.
If the crane overshoots its top/bottom position, or if the system fails “startup detection,” the upper/lower micro switch is the first component to inspect.
After cleaning or replacing, re-enter test mode to confirm each direction triggers the corresponding switch exactly once.
Optical Sensor (Photo Eye)
This includes the game’s position sensors, coin optical eyes, and the optional winning inductor.
Clean transmitter and receiver lenses using a soft cloth.
Ensure accurate alignment; even 1–2 mm deviation may cause missed detection, false coin counts, or misjudged prize drops.
In test mode, confirm real-time signal changes when interrupting the beam.
If the sensor has no response, verify wiring voltage (3–5V) and check the bracket angle.
A faulty winning inductor can directly affect prize-release logic, especially when the machine operates in “guaranteed prize” or “strong grip cycle” modes.
Maintenance Report & Professional Servicing
During each maintenance session, ensure to record short videos or take detailed photos, particularly when inspecting critical components such as sensors, gears, and motors.
These records serve as valuable documentation, allowing you to track performance trends and detect recurring issues over time.
If problems persist, don’t hesitate to contact YUTO Professional Servicing for expert support. When reaching out, please provide any relevant error codes, photos, and maintenance logs to facilitate a faster and more efficient resolution.
