Tuesday, November 17, 2009
Monday, November 16, 2009
Before the plate can be installed, the suspension dowels must be reinstalled. The Mason and Hamlin originally had one lag bolt per plate screw as suspension dowels. This is a rather undignified means of suspending the plate for a prestigious piano. So i changed to a standard two dowel per screw system.
I drill holes through the soundboard into the rim about 3/4" deep. These holes are roughly 1" on either side of the plate screw hole. I use a compressible indexing dowel to determine the length of the dowels to be installed. The indexing dowels are extended longer than the future dowel, and then the plate is installed on top. The weight of the plate compresses the indexing dowels to their proper height. The indexing dowels are then measured, and the permanent dowel length is matched. Glue is applied to the holes, the dowels are installed, and the plate is installed on top of the new dowels.
Thursday, November 12, 2009
I use my drill press for drilling most pinblocks. I built a cross sliding table that mounts to my drill press table. It moves both side to side and front to back. I use a chiller to keep the drill bit cool while drilling the very hard wood in the pinclock. The pinblock is marked when mounted to the plate to locate the pin hole locations.
If the plate has tuning bushings I drill the block through the plate. That's a discussion for another time
Monday, November 9, 2009
After the new board is glued into the piano, it is ready to be finished. The overhang at the front edge of the stretcher is planed flush and sanded. Also, any trim pieces must be reglued and soundboard decals applied. The the piano and bridges are masked, and lacquer is sprayed to complete the finish.
Tuesday, November 3, 2009
Both soundboards have been glued into the pianos. This is done after the bridges are attached and bottom side of the board is finished. This is accomplished with liquid hide glue and lots of clamps. After I complete this task, I nearly always sit down, and just reflect on all the work that has been done to get us to this place.