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oldguy Junior Member
Joined: 16 Jan 2011 Posts: 20 Location: Fort Qu'Appelle Sask
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Posted: Mon Mar 09, 2015 10:21 pm Post subject: Violin form to do repairs |
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This might be a dumb question, but here it goes. I saw a guy on youtube that does repairs/restorations and he put the top plate in a form to support the wood when he clamped the cleats on the cracks. So my question is, are the forms made to fit each violin, or does one size fit all. It looked like it was made maybe from plaster? Any one know. I have had a few that the center seams have come apart and I have found it almost impossible to clamp them when the plates are off. |
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kjb Super Member
Joined: 06 Feb 2013 Posts: 385
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Posted: Tue Mar 10, 2015 12:26 pm Post subject: |
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yes a general form will work for 4/4 could be exceptions. I made mine from 1/4' aluminum plate. you use it also for fitting the bass bar. You also have a form that is around 3 or 4" thick to lay the violin in to work on it.
THen there is the form that you form fit with plaster. and maybe more that I don't know about. |
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Mat Roop Senior Member
Joined: 24 Mar 2007 Posts: 911 Location: Wyoming Ontario
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L P Reedy Super Member
Joined: 02 Apr 2009 Posts: 276 Location: Brevard, NC
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Posted: Tue Mar 10, 2015 4:22 pm Post subject: |
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For center joins and full length cracks a plaster cast would be best. It would need to be made close, then scraped out to fit very well. The cast is really only needed for gluing the crack. Cleats can be clamped without it. I don't see how a bass bar frame would help. I have used zipper cleats with decent results. |
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oldguy Junior Member
Joined: 16 Jan 2011 Posts: 20 Location: Fort Qu'Appelle Sask
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Posted: Tue Mar 10, 2015 5:47 pm Post subject: |
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So with the plaster one, would you make a rough form (maybe wood) and then pour plaster in it, put a piece of saran wrap on top, and push the plate onto it until it sets? I have seen curved clamps available. Do they work? |
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oldguy Junior Member
Joined: 16 Jan 2011 Posts: 20 Location: Fort Qu'Appelle Sask
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Posted: Tue Mar 10, 2015 5:51 pm Post subject: |
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Actually, the clamps are available here. |
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FiddleDoug Member
Joined: 08 Sep 2007 Posts: 227 Location: Hilton, NY
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Posted: Tue Mar 10, 2015 10:07 pm Post subject: You've got it upside down |
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"So with the plaster one, would you make a rough form (maybe wood) and then pour plaster in it, put a piece of saran wrap on top, and push the plate onto it until it sets? I have seen curved clamps available. Do they work?"
You loosely attach the plate to a board, cover it with a thin rubber or plastic sheet, build a dam around it, and pour the plaster over the plate. The are not often used for just routine crack repair, but are required if you want to to soundpost or other invasive patches, or if you are doing re-arching. _________________ Doug Wall
www.wallindependent.com |
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oldguy Junior Member
Joined: 16 Jan 2011 Posts: 20 Location: Fort Qu'Appelle Sask
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Posted: Wed Mar 11, 2015 5:43 pm Post subject: |
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Ahhhh. That would work. Thanks. |
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Michael Darnton Moderator
Joined: 23 Mar 2007 Posts: 1281 Location: Chicago
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Posted: Wed Mar 11, 2015 7:06 pm Post subject: |
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When you see someone using a plaster cast for a minor job, it usually means he did something more invasive, as LP Reedy mentions. It's too much a bother to make one if you're not doing a big job, but once you have one, some people like to use them in the way of clamping cauls for other jobs. _________________ new blog at my site! http://darntonviolins.com/blog
my work sites: http://darntonviolins.com and http://darntonhersh.com |
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SooT Member
Joined: 18 May 2009 Posts: 74 Location: Devon, UK
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Posted: Thu Mar 12, 2015 4:31 am Post subject: |
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Being that my daughter had never even held a tool when she started her violin and bow making journey, the first task she was given was a piece of wood and told to practice using the gouge to make a form to use to rest a violin on. She still has it and uses it. Being a viola lover, she also made one for viola too. Lined it with self adhesive green baise (or whatever you call it). |
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oldguy Junior Member
Joined: 16 Jan 2011 Posts: 20 Location: Fort Qu'Appelle Sask
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Posted: Thu Mar 12, 2015 4:57 pm Post subject: |
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Has anyone used those clamps? Just thought it might be worth making a form as I get a lot of violins that the center seam is coming apart. |
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