RestorationAD Posted April 14, 2014 Author Report Share Posted April 14, 2014 The results of the change to the head on the headless. Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 14, 2014 Author Report Share Posted April 14, 2014 Headless test 1 Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 14, 2014 Author Report Share Posted April 14, 2014 Changed my control cavities again. Trying to speed up machine time cutting and changed the plate to extend off the body. When you start seeing it everywhere remember you saw it here first. Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 14, 2014 Author Report Share Posted April 14, 2014 I have blown off guitar building for a week because I had some stuff to do around the house and frankly I was disinterested after the latest snafu. Time for the Disaster tale. So I decided to try a Titebond glue up because this body is so light I didn't want a lot of epoxy weighing it down. Horrible idea. Note that this works but I have a suspect chunk of African Mahogany that has done this once before so shame on me for trying it again. The reason I stopped using Titebond for this is by what happens next. So the blank warped. Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 14, 2014 Author Report Share Posted April 14, 2014 And then this happened when I tried to straighten it. Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 14, 2014 Author Report Share Posted April 14, 2014 The fix is to clamp it straight for a day and add a strip into the middle. Needless to say I am not happy because of all the extra work I now have to do to salvage the top. I will probably take another week off before even bothering to look at fixing this. Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 14, 2014 Author Report Share Posted April 14, 2014 At least it didn't break on the glue line. Quote Link to comment Share on other sites More sharing options...
Prostheta Posted April 14, 2014 Report Share Posted April 14, 2014 I hear you about the water content issues of things like Titebond. Perhaps spritzing the rear of the blank with water and covering it with polythene whilst the joint evacuates its own moisture might help? Can't say that I have tried it yet, but having been through this exact same issue (including one attempt at flattening) I think that there has to be a way to deal with this. My thoughts have always been on adding four-way panel clamps, however since I don't need my own clamps right now this has never been actioned: http://www.axminster.co.uk/york-professional-panel-press Quote Link to comment Share on other sites More sharing options...
killemall8 Posted April 14, 2014 Report Share Posted April 14, 2014 Dang man. I have never had that happen with african mahogany and titebond. Wonder how that ended up warping so badly? Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 14, 2014 Author Report Share Posted April 14, 2014 Partly was my clamping. I used bars along the grain but did not use anything across the grain to keep it flat. I really need to break down and buy a vacuum press but I just don't have the room for a table and I am not really excited about using poly bags yet. This one particular board was very sensitive. Since it happened twice shame on me. The first time I thought I used too much glue and it was my fault. The second time I was really careful to not use too much so it wasn't that. We have had some strange humidity this year and maybe it was just a bad day. Quote Link to comment Share on other sites More sharing options...
Prostheta Posted April 14, 2014 Report Share Posted April 14, 2014 A vacuum press can develop a high pressure-to-area but ultimately only work up to pressures against the atmosphere. Great for the laminating but it won't keep the board flat. Sash cramps or perhaps a cast iron book press. Quote Link to comment Share on other sites More sharing options...
ScottR Posted April 14, 2014 Report Share Posted April 14, 2014 Maybe I'm just superstitious, but I still prefer machining it flat when the warpage goes with the grain like that. Against the grain bendage is okay to force back straight with clamps. Back to your first statement: Is epoxy that much heavier than titebond after all the squeezeout has been cleaned up? We're talking about a paper thin layer....or less. SR Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 14, 2014 Author Report Share Posted April 14, 2014 Maybe I'm just superstitious, but I still prefer machining it flat when the warpage goes with the grain like that. Against the grain bendage is okay to force back straight with clamps. Back to your first statement: Is epoxy that much heavier than titebond after all the squeezeout has been cleaned up? We're talking about a paper thin layer....or less. SR I would normally plain it out but this was so bad I wouldn't even have had a top left. As for the weight. West Systems is much thinner than some other epoxies so It is what soaks in the grain I am worried about. With multilams and veneers it is a lot of epoxy. And Mahogany pulls it in pretty fast. It seems my blanks are heavier lately. No science just the old luthiers feel. I might just be crazy. Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 14, 2014 Author Report Share Posted April 14, 2014 Oh and I was sure I did this all the time for 20 years before switching to epoxy a few years ago and never had this much trouble. So I was trying to make it work because I know it does. Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 14, 2014 Author Report Share Posted April 14, 2014 Last thing 2" thick blanks are more resistant to these things. The 1" blank seems to do this more often for some reason. Quote Link to comment Share on other sites More sharing options...
psikoT Posted April 14, 2014 Report Share Posted April 14, 2014 That body break was totally awful, sorry... i guess that ridiculous clamping is not the one you've used... I mean, you probably took off the other 20 clamps to take the pic, right?... or should I call the police? Love the electronics cavity... very cool idea. Quote Link to comment Share on other sites More sharing options...
Prostheta Posted April 14, 2014 Report Share Posted April 14, 2014 Plan it in and call it a feature! Ergonomic. Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 22, 2014 Author Report Share Posted April 22, 2014 Milling about... 7 String Multiscale body on the machine Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 22, 2014 Author Report Share Posted April 22, 2014 Recess for Hipshot single bridges and pickups. The weather was bad so I had to close the door on the shop. Tired of cold and rain. Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 22, 2014 Author Report Share Posted April 22, 2014 Then the sun came out. Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 22, 2014 Author Report Share Posted April 22, 2014 Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 22, 2014 Author Report Share Posted April 22, 2014 Oil for a few. Boring work. Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 22, 2014 Author Report Share Posted April 22, 2014 Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 22, 2014 Author Report Share Posted April 22, 2014 1 Quote Link to comment Share on other sites More sharing options...
RestorationAD Posted April 22, 2014 Author Report Share Posted April 22, 2014 1 Quote Link to comment Share on other sites More sharing options...
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