Attached is a photo of the tool or jig I made to make the bends in a new set of backcheck wires. If a 72 degree angle is not what you need, make a jig to your desired angle. The 72 degrees and jig both come from the Steinway World-Wide Technical Guide on CD. The binder clip on the bottom is my addition. The bottom of the jig sits flat on the back of the key, or more likely on the reinforcement block that the backcheck wire goes through. Once you have samples for each section adjusted, use the binder clip so when the jig is flush with the backcheck's back, the binder clip is right at the back of the reinforcement block. This way, once your samples are done, you can go from key to key and get the angle and position real close. You can even do this with the stack off. That means if you don't have the correct front to back wire bending pliers that other posts mentioned, you can do this with side bending wire benders! If you try to make these bends without wire bending pliers at all, you will not be happy. The reinforcement block will pop off and the wood will break somewhere. If the original angle was not 72 degrees, look at the wear. If it wore where it should, in the middle along a good length, it was a good angle. If it wore in one small spot, the backchecks were leaning back too far. -------------- next part -------------- A non-text attachment was scrubbed... Name: Backcheck jig with binder clip.jpg Type: image/jpeg Size: 71284 bytes Desc: not available URL: <http://ptg.org/pipermail/pianotech.php/attachments/20091115/16c2c52b/attachment-0001.jpg>
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