iandol on sat 13 jan 01
This talk about the geometry of a wedging table is interesting, as is =
the idea about the Mechanical Forces which are generated.
But, are we talking here about wedging or about kneading?
I can understand that when kneading the angle of the table will have an =
influence on your wrists. But if the effect is such as to cause pain or =
injury then it is probable that the clay being prepared needs to be aged =
or have more water added or the physical action should be reviewed.
If a persons wrists are suffering during wedging then they may be =
following through with their arms as the clay billet is brought down on =
its counterpart on the bench. If they are still holding the clay when =
contact occurs rapid deceleration will transmit a shock impact from the =
palms to the wrists. Better to release your grip on the clay before =
impact occurs.
Ivor Lewis.
vince pitelka on sun 14 jan 01
This talk about the geometry of a wedging table is interesting, as is the
idea about the Mechanical Forces which are generated.
But, are we talking here about wedging or about kneading?
Ivor -
Remember that most of the Clayart membership is in the US, and we do not use
the word "kneading." When we say wedging, we are talking about what you
call kneading.
Best wishes -
- Vince
Vince Pitelka
Appalachian Center for Crafts
Tennessee Technological University
1560 Craft Center Drive, Smithville TN 37166
Home - vpitelka@dekalb.net
615/597-5376
Work - wpitelka@tntech.edu
615/597-6801 ext. 111, fax 615/597-6803
http://www.craftcenter.tntech.edu/
Cindy Strnad on sun 14 jan 01
Hi, Ivor.
You're right about wedging. (cutting the clay in half, then slapping the
halves down on each other) I think we were talking about kneading, really.
I'd forgotten. We in the US seem to have a habit of using these terms
interchangeably, figuring out the meaning from context, and yes, you're
right again--they have different meanings.
Cindy Strnad
Earthen Vessels Pottery
RR 1, Box 51
Custer, SD 57730
USA
earthenv@gwtc.net
http://www.earthenvesselssd.com
iandol on tue 16 jan 01
Thanks Cindy,
I suspected that was the case. I can see the advantage of having the =
table slope downwards away from you when kneading. A little bit of help =
from Gravity as you lunge forward and down would help to consolidate =
clay as it is being worked, regardless of using Ram's head or Spiral =
Kneading. But a little more effort to pull it back up the hill on the =
return stroke.
Best regards,
Ivor Lewis. Redhill, South Australia
Martin Howard on tue 16 jan 01
The perfect wedging or kneading table has a circular barrel and motor fixed
to it.
It is then called a pugmill.
It certainly avoids injury to backs and thumb joints.
Just wish they didn't cost so much. But they are cost effective. One
treatment from the chiropractor or physiotherapist is £24. That soon adds
up.
Martin Howard, with no back pains after having just pugged and de-aired 50
kg of clay while teaching a new student.
Webb's Cottage Pottery
Woolpits Road, Great Saling
BRAINTREE, Essex CM7 5DZ
England
martin@webbscottage.co.uk
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