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mark bailey
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11/05/2019 4:14 pm  

Woop!

 

Measure twice, cut once...


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syntholabo
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13/05/2019 12:37 am  

Fired it up today, after UK plug change... I ruined my first roll of p150 >:(

2 questions came to mind, as I contemplated the build again:

- Do you join the tops and backs before doing any sanding?

- I never thought through what grits I need for each part of the sequence- I don't recall changing paper on your Jet 1632 when I made BYO4. 

 

 

 

 


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mark bailey
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14/05/2019 1:26 pm  

Hey @syntholabo

- Do you join the tops and backs before doing any sanding?

Thicker pieces (elec guitar bodies, caps etc) can be sanded before joining just to make it easier to work with but I would aim for maybe 80% done and put them through again after joining.

Thinner pieces (soundboards, backs, thin caps) - to be on the safe side you might want to join them first - you have to make a judgement call. Usually the more expensive the wood, the thinner it arrives...

Whatever else happens - I always sand after joining - as there is always a small step somewhere...

- I never thought through what grits I need for each part of the sequence

I mostly leave it loaded with 80g and change to 60g if needed.

60g is great for getting awkward pieces flat and will not clog up - can be a problem - especially with Rosewood and other oily/resinous woods.

I sand 120g and finer by hand (or with my orbital sander) and don't use the machine as it clogs too easily

Also get yourself some abrasive belt cleaner - it will save you a small fortune!

Measure twice, cut once...


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syntholabo
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14/05/2019 10:34 pm  

Yeah that abrasive stuff is magic - been using it on belt and spindle sanders very effectively.

I will downgrit to 80, especially having ruined the 150 grit this weekend on an old cedar garden bench - doh!

---

Have you ever tried resawing a piece for back, sides or top? I have a piece of maple about 8mm thick which seems a waste to sand away.

 

 

 


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mark bailey
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15/05/2019 5:09 pm  

 ? I have re-sawn wood for ukes but not full sized acoustics, as my bandsaw is a bit too wimpy for that sort of thing.

8mm is probably too thin to bookmatch - you will likely end up with veneers - or worse...

You could try but I don't fancy your chances  ? 

I know it is annoying but it is better to try not to be too greedy....the bandsaw needs feeding...it is hungry....it will eat it. ? 

My advice: Use the 8mm for something else and find another piece.

This post was modified 3 months ago by mark bailey

Measure twice, cut once...


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