|Project by mpounders||posted 02-15-2011 10:13 PM||5332 views||19 times favorited||12 comments|
Using a positioner allows you to carve with both hands, and gives greater control and more power for certain types of carving. Working in the round and roughing out a large carving is easier and faster!
Glue a couple of scrap pieces of half-inch plywood together or use two pieces of three-quarter inch plywood. Transfer the shapes for the top and bottom to the plywood and cut out with either a band saw or jigsaw. Clamp or tape the pieces together and drill the three bolt holes. Use a Forstner bit on the bottom of the base to create recessed holes for the bolt heads. The ball is a 2 ½” wooden knob from a hobby store. Drill a hole in the ball so that the pipe fits loosely and epoxy the pipe in the hole. A 3” floor flange with a reducing bushing is used to mount your work piece to the pipe. Use a sanding drum to taper out the holes in both base assemblies to give a greater range of movement and allow shorter bolts to be used to hold it together. Use a wing-nut on one bolt for quick adjustments. Sand and round the rough edges. Larger work can be directly mounted with screws or make an adapter as shown for smaller work.
2 pieces ¾” plywood 8”x6” (or 4 pieces of ½” plywood)
3” iron floor flange with a ½” to ¼” reducer
6” piece ¼” ID threaded pipe (or similar size bolt that will thread Into the reducer”
2 ½” wooden ball (from hobby/craft store)
3 ¼”x3” bolts and nuts with one ¼” wing-nut
Misc: Drill and bits, epoxy glue, screws, bolts, or clamps to mount to desired surface.
-- Mike P., Arkansas, http://mikepounders.weebly.com