Pumping
Overview
Pumping Motion
Pumping is movement of a piece along the axis of rotation (the Z axis).
Examples of this device in use
- This YouTube video, Ornamental Turning with the Lindow White Rose Engine Side Pumping, shows pumping.
- The second YouTube video, Pump cutting on the MDF Rose Engine, shows pumping on an MDF Rose Engine (which Pat Miller made). This is a very innovative approach that Pat made, using the rosette designed to move the object in a rocking motion, and converting that motion into a pumping action.
- The third YouTube video, Dan Henry - Pumping Mechanisms, was given at the OTI Symposium in Seattle Washington.
Usage Notes
Pumping & a Curvilinear Slide
If the artist is using a curvilinear slide which produces a curve as shown to the right, then the cutting action on the left will be the inverse of the cutting on the right. (This inverse cutting relationship is equivalent to cutting on the near side vs. cutting on the far side when rocking.)
The effect can be startlingly beautiful: concave patterns on one side are convex on the other, and vice versa.
One artist who has used this to make some beautiful pieces is Christian Lindow, using equipment at the Plumier Foundation.
More Information
Published Articles
- Pumping On the Rose Engine by John Tartly. Ornamental Turners International Newsletter, Volume 21, No. 1 - Spring, 2014, pg. 13
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Disclaimer: eMail comments to me at OTBookOfKnowledge @ Gmail.com. The process of woodturning involves the use of tools, machinery and materials which could cause injury or be a health hazard unless proper precautions are taken, including the wearing of appropriate protective equipment. |