Introduction
This manual provides comprehensive instructions for the Cherub WSM-330 Mechanical Metronome. This device is designed for musical practice, featuring a high-accuracy precision spring mechanism. It offers a variable tempo range from 40 to 208 beats per minute (BPM) and includes a downbeat bell with a distinct tone. The metronome is presented in a traditional tower shape, ensuring stable and reliable performance.

An image of the Cherub WSM-330 Mechanical Metronome, showcasing its traditional tower shape and pendulum.
Setup
Before first use, carefully unpack the metronome from its packaging. Place the metronome on a flat, stable, and level surface to ensure accurate and consistent pendulum swing. Verify that any protective packaging materials or shipping locks, if present, have been completely removed from the pendulum and mechanism area.
Operating Instructions
Tempo Adjustment: To set the desired tempo, gently slide the weight on the pendulum rod up or down. The numerical scale on the metronome indicates the beats per minute (BPM). Sliding the weight upwards will decrease the tempo (slower BPM), while sliding it downwards will increase the tempo (faster BPM).
Winding the Mechanism: Locate the winding key on the side of the metronome. Gently turn the key clockwise to wind the internal spring mechanism. Wind until you feel a slight resistance; do not overwind, as this can damage the mechanism. A full wind typically provides several minutes of continuous operation.
Starting and Stopping: To initiate the metronome's ticking, gently push the pendulum to one side and release it. The pendulum will begin to swing, producing the rhythmic beat. To stop the metronome, gently hold the pendulum until its movement ceases.
Downbeat Bell: The WSM-330 includes a downbeat bell feature. This bell can be configured to ring at specific intervals, such as every 2nd, 3rd, 4th, or 6th beat, or it can be turned off entirely. Adjust the bell setting using the small lever typically located near the winding key on the side of the metronome. Select the desired beat interval or '0' for no bell.
Maintenance
Cleaning: To maintain the appearance and functionality of your metronome, wipe its exterior with a soft, dry, lint-free cloth. Avoid using abrasive cleaners, chemical solvents, or excessive moisture, as these can damage the finish and internal components.
Storage: When not in use, store the metronome in a dry, stable environment away from direct sunlight, extreme temperatures, and high humidity. For extended storage, ensure the pendulum is secured and the spring mechanism is unwound to relieve tension.
Lubrication: The internal precision mechanism of the Cherub WSM-330 is factory-lubricated and sealed. User lubrication is generally not required or recommended. If the metronome exhibits inconsistent operation or unusual sounds, it is advisable to consult a qualified instrument technician for professional service.
Troubleshooting
- Metronome not ticking: Ensure the spring mechanism is fully wound. Check that the pendulum is free to swing and is not obstructed by any packaging or external objects.
- Inconsistent tempo: Verify that the metronome is placed on a perfectly level and stable surface. Ensure the pendulum weight is securely set at the desired BPM mark and has not shifted.
- Downbeat bell not ringing: Check the downbeat bell setting lever on the side of the metronome. Ensure it is not set to '0' (off) and is correctly positioned for the desired beat interval (e.g., 2, 3, 4, or 6).
Specifications
| Item Weight | 1.37 pounds |
| Product Dimensions | 9.8 x 5.1 x 5 inches |
| Model Number | WSM-330 |
| Date First Available | September 7, 2010 |
| Tempo Range | 40-208 beats per minute (BPM) |
| Beat Settings | 0, 2, 3, 4, 6 |
Warranty Information
Specific warranty details for the Cherub WSM-330 Mechanical Metronome are not provided within this document. For the most accurate and up-to-date warranty terms and conditions, please refer to the manufacturer's official website or contact the authorized retailer from whom the product was purchased.
Support
For further assistance, product inquiries, or technical support regarding your Cherub WSM-330 Mechanical Metronome, please visit the official Cherub brand store or contact their customer service department directly.





