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Chattering?


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#21 docweathers

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Posted 20 September 2012 - 10:21 PM

On YouTube I've seen some demonstrations of chattering on freshly thrown soft clay. It is still soft enough that they can expand the body of the pot to stretch the pattern. I've tried this with no luck. Any suggestions on how to get chattering to work on soft clay would be appreciated.

Larry

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#22 Brian Reed

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Posted 17 January 2013 - 07:08 PM

Old thread, I know, but I did recently make an instructional video on how I make my tools and use them. I am not great at making videos, but was asked to get this together for an article that I was asked to write.



Let me know what you think.


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#23 Natania

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Posted 17 January 2013 - 09:25 PM

I know this thread is about trying to get the chattering effect, but I had just decided to post a question about avoiding it, although when used intentionally the effect is quite stunning on the examples posted here. I know that trimming pots that are a bit too dry does it, but I am wondering if using dull tools add to this " problem?

#24 yedrow

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Posted 18 January 2013 - 12:03 AM

In my experience sharp tools are more likely to cause chattering.

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#25 docweathers

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Posted 19 January 2013 - 11:29 AM

Sometime ago I found these two YouTube videos of the guy doing great chattering on soft clay. Chattering technique on flat form - pottery surface texture


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.


Larry

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#26 Babs

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Posted 18 September 2014 - 09:43 PM

Yes, wheel speed matters. But to get really nice designs I focus on tool angle.

gallery_10453_377_838240.jpg

Is this Chattering??
Amazing.
Haven't seen such distinct spiralling pattern. Stopping on reaching bottom of each spiral but then how to 're enter ' for the next chatter???
Stunned.

#27 Min

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Posted Yesterday, 08:37 AM

Looks similar to what is done with the Steve Tool.

 

http://www.graberspottery.com/

 

other_peoples__pottery_poster_lowbytes.J

 

 



#28 Babs

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Posted Yesterday, 06:02 PM

Chattering soft clay then opening vessel to emphasis the spiral??






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