|Project by CFrye||posted 03-07-2014 04:43 AM||2103 views||3 times favorited||30 comments|
From the beginning of this Measurement and Layout swap I wanted to make a beam compass. I searched on line, repeatedly, and was surprised at how few I found that were all or mostly all wood. Nothing wrong with metal beams or trammells, just not what I wanted to do (although I was really tempted by the Rockler trammels like Sanding2day used for his version. Mafe built an all wood model. I really liked his idea of using wedges. I found a restoration of a beam compass with wedges at Full Chisel Blog and patterned mine after that. Enough chit chat. :-)
The Beam Compass was made from two 2×2’s from the big box store. The gnarly grained piece had to be the beam and the winding sticks. I was concerned they might not remain true. Went with them anyway. Couldn’t resist that figure! The 2×2 was cut into three pieces on the table saw and cut to 24” long. The wedges are maple. The points are broken drill bits cut to length and sharpened on the bench grinder. Initially I was going to use 2mm pencil lead points for the pencil trammell. That worked until I broke the lead off flush trying to remove it after a test fit. Eventually settled on pencil stubs held in place with friction of a leather strip that threaded through the trammell and was tied in a knot. I made a union or sleeve so that the winding sticks could be used to extend the beam for longer diameters. The ends of the winding sticks were inlayed with walnut and maple and a maple dot was inlayed in the middle (didn’t get a pic of that). It was all finished with black wax (Johnson’s Paste wax mixed with soot from the wood stove) to bring out the grain in the oak. A second coat of plain wax and a light buffing followed. All three trammels can be used together with an ellipse engine called a Do-Nothing-Machine).
LakeLover is the recipient of these tools. I hope he will get lots of use out of them and modify them to fit his shop and own woodworking style. The Monte Python quote is from a comment LakeLover made somewhere along the way.
-- God bless, Candy