There are many factors needed to brew an amazing cup of coffee. Having good equipment is essential and the grinder is just as important as the machine itself.
Your choice of coffee grinder will depend mainly on the volume you expect to be doing. The busier you are, the more powerful grinder that will be needed.
Maintaining your grinder is critical. The hopper and doser should be cleaned out daily and no beans should be left in the grinder overnight. The burrs should be changed frequently as grinding with blunt burrs ruins the coffee.
There are various types of coffee grinders available:
Flat Burr grinders - These are relatively cheaper and work at a high revolution speed. Suitable for smaller volumes
Conical burr grinders - These are more expensive but can handle larger volumes. They work at a lower revolution speed.