- Medium being pumped: Liquids in vending machines, such as syrup, juice, and milk, can all be pumped using a peristaltic pump.
- Choosing the appropriate flow rate: Standard vending machine cups typically have capacities of 300ml and 450ml. Taking a 300ml cup as an example, it takes approximately 10 seconds to pump. Therefore, the peristaltic pump flow rate needs to be selected as 300 * 60 / 10s = 1800ml/m. Considering that syrup and similar liquids are located above the pump, the gravity of the liquid itself will increase the flow rate. Therefore, a flow rate of 1500ml/m – 1600ml/m is generally sufficient. A peristaltic pump like the K25S or K4025 (speed 0.300rpm) would meet the requirements.
- Selecting a suitable motor: The choice of motor mainly depends on the control system of the entire vending machine. For example, if there is integrated circuit control, precise control can be considered. Stepper motor control chips can be added to the integrated circuit to reduce the cost of using stepper motors and make the entire system more precise and easier to control. If the economy of the vending machine is considered, a DC motor can be selected, and the running time can be controlled by start-stop, which can achieve a low-cost vending machine that can be widely promoted.