Posted 20 September 2012 - 10:21 PM
Posted 17 January 2013 - 07:08 PM
Let me know what you think.
Posted 17 January 2013 - 09:25 PM
Posted 18 January 2013 - 12:03 AM
Posted 19 January 2013 - 11:29 AM
When I could not make it work very well I wrote him. below I've inserted the essence of our email exchange.
The common wisdom is that you do chattering someplace beyond leather hard. Obviously, from your YouTube videos "Chattering Surface Texture Technique on Tall Forms - Potter's Wheel Demo" and "Chattering technique on flat form - pottery surface texture ". You make it work quite spectacularly with freshly thrown soft clay. I have tried to emulate your chattering of soft clay, with no luck.
What's the secret to making chattering work on soft clay.
The "knobs" are:
1) Wheel speed
2) Pressure of spring metal on clay
3) Resistance of clay (how soft or hard)
4) Length of vibrating spring metal measured from point of contact with the clay to where it is held.
With he above variables, the frequency or wave length is set and the most difficult part is to start the vibration. Play with all variables until you feel slight vibration. When you sense the first tiny vibration, release the pressure a bit until the vibrations is amplified and the sound gets louder and louder.
I think the key is in his last sentence. I still can't get it to work all the time but occasionally I have had some pretty good luck.
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