1. The slab roller must be available as a table surface when not in use.
2. Construction must use relatively simple carpentry methods.
3. Cost must be less than $300US
4. The slab thickness should be easily and quickly adjusted
I found a set of plans and cut-sheet, along with some instructive videos at http://mypotterytools.com/index.html that seemed to meet my needs and capabilities. A PDF version of the plans, with parts-list was very helpful. The cut-sheet is set up to cut 2 sets of wooden parts, so I adjusted the cut sheet so that the grain was correctly oriented for the application. I used a cabinet grade 3/4" plywood that I found at Home Depot and was very happy with it's strength and appearance. No need for hardwoods or expensive plywood for this application.
EDIT It's become evident that the web address listed above is not available. I have uploaded the plans and cut-sheet to my server so they are available to interested parties. Select the "SLAB ROLLER PLANS" link at the top of this blog for the PDF plans and cut-sheet.
Also, please consider donating to the author at the above address, when it is online again - Timo
The only issue I came across, while building this tool, was when I glued the guide rings to the rollers. I needed to use a "hot" blue colored glue to get a good bond and this left the visible residue in the video. Because this is a tool - not an art piece - I can live with the residue as the price for a good bond. The next one will be neater.
Here's a video of the project in my studio.
Home Made Slab Roller from Tim O'Neill on Vimeo.
A look at the design and use of my home-made ceramics slab roller.
Plans and info at www.mypotterytools.com/index.html (not my site)
For a look at some of my work, go to www.mudismymedium.com