How to Choose Between Brushed and Brushless Ink Pumps
In UV printers, eco-solvent printers, and wide-format printers, the ink pump is a critical component that maintains ink supply and printhead cleaning. The core driving force of the ink pump comes from its motor. Common ink pump motors are divided into two types: brushed motors and brushless motors. Different motor types directly affect the pump’s lifespan, performance, and suitable application scenarios.
1. Brushed Motor Ink Pump
Working Principle:
A brushed motor consists of brushes, a commutator, stator, and rotor. When current flows through the brushes and contacts the commutator, the current direction is mechanically switched, causing the rotor to rotate continuously. The motor drives the diaphragm or rotor inside the ink pump chamber to complete the suction and discharge of ink.
Advantages:
Simple structure: Mature manufacturing process with highly interchangeable parts.
Low cost: Affordable price, suitable for users with limited budgets.
Easy maintenance: Failures usually come from brush or commutator wear, which can be easily replaced.
Fast start-up response: High starting torque, suitable for applications requiring instant pressure delivery.
Disadvantages:
Fast mechanical wear: Continuous friction between brushes and the commutator; typical lifespan is 1,000–3,000 hours.
Higher noise: Friction generates noise and sparks, unsuitable for noise-sensitive environments.
High heat generation: Prolonged operation may cause overheating, which can increase ink temperature or cause instability.
Moderate stability: Mechanical commutation is less precise, making it difficult to maintain highly accurate ink delivery.
Typical Applications:
Commonly used in entry-level wide-format printers and small UV printers, suitable for users with low-to-medium print volumes and moderate ink supply requirements.
2. Brushless Motor Ink Pump
Working Principle:
A brushless motor eliminates the mechanical brushes and commutator. Instead, it uses an electronic driver and Hall sensors to switch current. The rotor is made of permanent magnets, while the stator windings generate a rotating magnetic field under electronic control, driving the rotor’s rotation. The motor then drives the ink pump to perform precise ink suction and discharge.
Advantages:
Long lifespan: No brush wear, with a lifespan of over 10,000 hours.
Stable operation: High electronic commutation accuracy ensures smoother ink delivery with minimal pulsation.
Low noise and low heat: Less friction means reduced heat buildup, ideal for continuous operation.
Low maintenance: No frequent replacement of wear parts, reducing downtime and maintenance costs.
Strong controllability: Adjustable speeds allow flexible ink supply for different work modes.
Disadvantages:
Higher cost: Typically 30%–50% more expensive than brushed motors.
Complex maintenance: More sophisticated electronics; faults may require replacing the motor assembly or driver board.
Sensitive to power quality: Unstable voltage may affect driving performance.
Typical Applications:
Widely used in mid-to-high-end UV flatbed printers and large-format printers, especially in environments requiring long-term continuous operation, stable ink supply, and precise cleaning performance.
Summary
Brushed Motor Ink Pumps: Affordable and simple, but limited lifespan. Best suited for small and mid-size equipment or entry-level users.
Brushless Motor Ink Pumps: Durable, stable, and low-noise. Although more expensive, they provide higher cost-effectiveness over long-term use.
Note: In practice, many printer manufacturers offer both brushed and brushless ink pump configurations for the same printer model, allowing users to choose based on budget and application needs.
Contact Us
We supply multiple models of both brushed and brushless motor ink pumps, compatible with a wide range of UV printers and wide-format printers. Feel free to leave a comment below or contact us directly for detailed model information and pricing!