Body Positioning — The Foundation
Before you touch the clay, fix your posture. Sit close to the wheel with your body centered in front of it. Plant your feet flat on the floor. Keep your elbows locked against your sides or braced on your thighs. Stephen Jepson emphasizes that throwing is not about hand strength — it is about using your body weight and core stability to control the clay.
Beginners instinctively reach forward with their arms, which puts all the stress on small muscles that fatigue quickly. Lean in with your torso instead. The clay should come to you, not the other way around.
Centering Troubleshooting
If the clay wobbles no matter what you do, check these three things: (1) Is the clay well-wedged? Air pockets cause off-center movement. (2) Are your elbows braced? Unsupported arms cannot apply consistent pressure. (3) Is the wheel speed fast enough? Centering requires 200-300 RPM — slow speeds make it harder, not easier.
Speed Control
Wheel speed changes with every step. Fast for centering — the momentum helps force the clay into position. Medium for opening and pulling walls — fast enough for smooth movement, slow enough for control. Slow for shaping, trimming, and detail work — your fingers need time to feel what the clay is doing.
- Centering: 200-300 RPM. Full speed. Let the wheel do the work.
- Opening: 150-200 RPM. Push down into the center, open the floor.
- Pulling walls: 120-150 RPM. Steady, consistent pulls from base to rim.
- Shaping: 60-100 RPM. Gentle pressure, gradual curves.
- Trimming: 80-120 RPM. Controlled removal, check thickness often.
Water Management
Water is lubricant, not an ingredient. You need just enough to keep your hands sliding smoothly — a thin film, not a flood. Too much water saturates the clay, weakens the walls, and causes collapse. Stephen Jepson teaches beginners to dip two fingers in water and re-wet frequently rather than pouring water onto the piece.
Keep a sponge nearby to remove water that pools inside the pot. Water sitting in the bottom softens the floor and causes S-cracks during drying.
Wall Thickness Control
Aim for about 1/4 inch throughout. Use a needle tool to check — gently push it through the wall near the base and feel for thickness with your outside finger. Even walls dry evenly, fire evenly, and resist cracking. If one side is thicker, you applied uneven pressure during pulling. Correct by making one more careful pull with attention to the thick spot.
Common Beginner Mistakes
- Fighting the clay — Squeezing too hard with your hands instead of leaning in with your body.
- Too much water — Flooding the piece until it collapses. Less is more.
- Pulling too fast — Rushing the pull tears the wall. Slow, steady pressure.
- Uneven floor — Not opening the floor flat leaves a hump that creates thick, uneven bottoms.
- Thin rims — Over-pulling at the top creates a paper-thin rim that cracks. Leave the rim slightly thicker.
Practice Drills for Muscle Memory
Set a timer for one hour and throw as many pieces as you can. Do not trim, do not keep, do not judge. The goal is repetitions. After 50 cylinders, centering becomes automatic. After 100, pulling walls feels natural. This is not wasted clay — this is how your body learns.