The adjustable discharge particle size of the new sand maker can be achieved by adjusting the following equipment parameters:

1. Rotational speed: Adjusting the rotational speed of the equipment can affect the discharge particle size. Increasing the rotational speed may make the particles finer, while decreasing the rotational speed may make the particles coarser.

2. Feeding rate: Adjusting the feeding rate can affect the discharge particle size. Increasing the feeding rate may make the particles finer, while reducing the feeding rate may make the particles coarser.

3. Discharge opening size: Adjusting the discharge opening size can control the discharge particle size. Increasing the discharge opening size may make the particles coarser, while reducing the discharge opening size may make the particles finer. 

4. Vibration frequency and amplitude: For some specific types of sand making equipment, adjusting the vibration frequency and amplitude can also affect the discharge particle size. Increasing the vibration frequency and amplitude may make the particles finer, while decreasing the vibration frequency and amplitude may make the particles coarser.

It should be noted that new sand making equipment of different models and brands may have different parameter adjustment methods and ranges. Therefore, in actual operation, the corresponding equipment parameters should be adjusted with reference to the equipment's instruction manual and manufacturer's recommendations to achieve the required discharging particle size. For a new sand making equipment, please consider the more powerful Talus sand maker.