Segment degree blocks - Woodworking Talk - Woodworkers Forum
 
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post #1 of 5 Old 07-21-2010, 12:49 PM Thread Starter
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Segment degree blocks

Anyone ever try those orange plastic bowl segment set up blocks?The mitre's on tablesaws are pretty accurate but when you have 24 cuts to make for a 12 segment bowl it shows up as you put in that last segment and have to make that special cut to get it all to fit tight.?? Itchy

***For the record*** Ive made hundreds of guitar bodies,never put one together and cant play a note.
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post #2 of 5 Old 07-21-2010, 02:17 PM
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I think they don't work. I made myself gauge after I did one of my segmented projects. I made test cuts until they were perfect. Then I cut one extra block to use for setting up the saw the next time I did the same number of segments. It didn't work. I still had to readjust slightly.
What I did that worked was to build myself a sliding miter table that rides in both miter slots. Once I got this adjusted it's never moved. I still occasionally get a bad cut but I think that's due to my mediocre table saw and how fast or slow I feed the work through the blade.
What I'm working on now is using a disc sander. Malcolm Tibbets in his book on segmented turning shows how to do this. You build a jig for the disc sander that sands the miters perfect. Then you can use either the table saw or even bandsaw to cut your blanks close to size. You fine tune them on the disc sander. This not only gives you perfect segments but also allows you to cut the segments with the grain running any way, or to glue in extra pieces for accents and then sand them flush.
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post #3 of 5 Old 07-21-2010, 03:25 PM Thread Starter
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They probably work better if they were bigger like maybe 5-6".

***For the record*** Ive made hundreds of guitar bodies,never put one together and cant play a note.
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post #4 of 5 Old 07-22-2010, 12:32 AM
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I bought myself the Incra 1000SE miter gauge to use for mitering the segments. It is an expensive miter gauge but you can fine tune it to get the cuts perfect. If you plan to do a lot of segmented bowls or other projects that require very tight miters it is well worth the investment. After using mine I love it, and don't know what I would do without it most of the time.

Assumption is the mother of all foul -ups
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post #5 of 5 Old 07-24-2010, 03:41 PM Thread Starter
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Received the blocks from rockler.They are clear orange in color.They are made to set up your table saw for cutting segments for bowl .They are for 4,6,8,9,10,12, and 16 segments at various degrees for each one.Today I used the 12 segment block and it came out great,no gaps.If you are interested in getting some you can puchase them on ebay under segmented bowl and they are a few bucks cheaper ther for some reason.About $20,a little pricey but they work.They are lazer cut.I found out one of my mitre's are off about 1/2 a degree using one of the blocks.With 24 cuts to make a 12 seg bowl ring that leaves gaps.Itchy

***For the record*** Ive made hundreds of guitar bodies,never put one together and cant play a note.
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