Use a steady, relatively brisk rotation for centering, then reduce speed as the clay becomes a taller or more open vessel. The right setting leaves time for your hands to move smoothly around the full circumference. Dial positions and RPM values are specific to the wheel and the work.
Learn the control response
A broad plate, narrow cylinder and compact lump respond differently to rotation. Clay consistency and the pace of your hand movements also affect control. Treat another potter’s setting as a starting observation, not a value to copy automatically.
With the wheelhead clear, learn how the pedal or dial starts, accelerates and stops the wheel. Some machines have a displayed speed; others do not. Follow the manual’s operating limits and get familiar with the control before using it on a delicate rim.
Centering and opening
Centering commonly uses a comparatively brisk, steady rotation because supported hands are bringing a compact mass into alignment. That does not mean maximum speed is required. If your posture becomes unstable or water sprays around the room, reassess the working speed and amount of clay.
During opening, keep a steady setting that lets you locate the center and control depth. A sudden speed change while a finger is pressing down adds another movement to coordinate.
Pulling and finishing
A tall or outward-opening wall generally requires more restrained rotation than the original solid lump. If a cylinder starts spreading into a bowl while you mean to keep it upright, speed is one variable to inspect alongside outward hand pressure and soft clay.
For rim finishing, slow enough to observe a full revolution. Adjust speed smoothly before applying a rib or other tool. If the form begins to sway, ease away and reassess its support and clay condition.
Recognize a useful speed change
Notice the immediate effect of an adjustment. Smoother contact may mean the rotation now suits your hand movement. A top that spreads outward calls for checking speed together with outward pressure and softness. Tool bounce also needs an attachment and tool-angle check; it does not identify a speed problem by itself.
If you record settings, include the machine, clay amount and stage. Those notes let you return to a familiar starting setting on that wheel.
Questions about this topic
Does a faster wheel make taller pots?
Not by itself. Height depends on distributing and supporting the clay. Excessive speed can make an increasingly thin wall harder to control.
What speed should I use for trimming?
Use a controlled setting appropriate to the supported form and tool. Begin cautiously, keep cuts light and stop if the pot shifts. Secure attachment comes before speed.