Jim, Jig image below. The small block to the right of centre has a groove in it which allows the long knurled thumb-screw to tighten the block onto the wire, holding it in a centralised position while the two coils are formed around the pin by hand (using a pair of parallel pliers on the small 'crank' on the end of wire). The forming pin is removable, so that I can turn up a suitable pin for making coils to the desired diameter. There always will be some spring-back after the coil is formed, so the forming pin needs to be smaller than the desired final diameter. The springback will be less with thicker core wires, and vice versa. The small 'crank handle' on the end of the wire, and the bend at the coil, are formed with parallel jaw pliers before the wire is fitted to the jig. The knurled thumb-screw has a long shaft made to a specific length, which provides a ready reference for determining where to position the bends on the wire before making the eye, to provide just enough wire to make the job of hand winding the coils around the back length segment, then bending the tail back to an appropriate angle before cutting it to length. When cutting the tail to length, its a good idea to keep the cutter jaws parallel to the plane of the eye. This prevents the sharp edges of the cut-tail from damaging the paint work on the plate. Ron O >I'd sure like to see that jig for making them >that tight. (I do it the old way with round-nose >pliers) > >Thanks, >Jim Busby BYU > > >From: caut-bounces at ptg.org >[mailto:caut-bounces at ptg.org] On Behalf Of Ron >Overs >Sent: Saturday, May 03, 2008 9:41 PM >To: College and University Technicians >Subject: Re: [CAUT] Bass bridge, string scale, cantilevered bridge, tone -- OVERS PIANOS - SYDNEY Grand Piano Manufacturers _______________________ Web http://overspianos.com.au mailto:ron at overspianos.com.au _______________________ -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/caut.php/attachments/20080506/8dd7f535/attachment-0001.html -------------- next part -------------- A non-text attachment was scrubbed... Name: P3666AB35 2.png Type: image/png Size: 228781 bytes Desc: not available Url : https://www.moypiano.com/ptg/caut.php/attachments/20080506/8dd7f535/attachment-0001.png
This PTG archive page provided courtesy of Moy Piano Service, LLC