The choice of which peristaltic pump is better depends on the specific application scenario. Specific factors to consider include:
1. Accuracy: If high accuracy is required, a stepper motor peristaltic pump is the better choice; if accuracy requirements are lower, a DC motor is preferable.
2. Flow rate: Flow rate generally refers to the flow rate. In this case, a DC motor is better than a stepper motor because DC motors have higher torque and are easier to operate.
3. Characteristics of the liquid medium: This generally refers to the corrosiveness and particle size of the liquid. For corrosive liquids with high flow rate requirements, a DC motor is the better choice; for lower flow rate requirements, a stepper motor is suitable.
4. Control system: For centralized circuit control, considering cost, lifespan, and accuracy, a stepper motor is preferred; for simple control or start/stop switch control, a DC motor is sufficient.
5. Operating environment: If the conveying environment contains volatile gases or corrosive liquids, a stepper motor with better sealing performance can be considered.