Maxwell Morgan Posted July 11, 2018 Report Share Posted July 11, 2018 Hello Everyone, I currently have a cello top on the bench and I have made several attempts at dry clamping in order to align this top crack, but when the crack appears to be leveled, the bottom edge still does not align properly. I personally have never seen something like this before and looking for ideas and advice on what to do. Thank you in advance Quote Link to comment Share on other sites More sharing options...
Brad Dorsey Posted July 12, 2018 Report Share Posted July 12, 2018 By "the crack appears to be leveled" do you mean that both sides of the crack are flush with each other along the entire length of the crack? Quote Link to comment Share on other sites More sharing options...
Jerry Lynn Posted July 12, 2018 Report Share Posted July 12, 2018 Most likely the arch has relaxed on one side of the break (generally it’s a smaller piece that has broken off, or a flank split from end to F hole.). You will need some means of pushing the ends into alignment. A jig using small counter forms and wedges pushing against pins is useful for this. Quote Link to comment Share on other sites More sharing options...
ctanzio Posted July 12, 2018 Report Share Posted July 12, 2018 Cracked instruments that are strung at tension for an extended period of time can exhibit strange miss-alignments due do plate deformation caused by creep in highly stressed areas of the plate. Sometimes placing the plate on a flat surface for a few days and gently clamping a few edges to get it to sit flush will reverse enough of the creep to correct the alignment issues. You can also try carefully heating the clamped plate with a hair dryer, or carefully moistening the underside before clamping. Quote Link to comment Share on other sites More sharing options...
jacobsaunders Posted July 12, 2018 Report Share Posted July 12, 2018 what does the other end of the crack look like? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.