This is a hobby for me.This is the first time I have tried doing a stave and spline build. 10 x 9 degrees makes a semi-circle, 20 x 9 degrees makes a full circle.
The sub is a variation on a Ripole design with forwards and backwards facing U shaped wells.
The front well has a restriction which lowers FS, flattens response curve and increases velocity (higher output) over back well at the expense of reducing high frequency extension.
Splines are cross-grain to the slots for strength and alignment.
I used a combination of router jigs and a flush cut table saw fence to round the semi-circles. Rounding on the TS is sometimes frowned upon.
This project is giving me a chance to experiment with new fabricating methods and jigs.
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2022/03/30 Historical Records CENSORED
Edits: 05/23/24 05/23/24 05/23/24 05/23/24
Follow Ups:
- RE: New sub cab builds - Brad225 06:43:58 05/24/24
(3)
For your first stave and spline attempt that is quite good Tim.
With the right jigs and a carful approach you can do a lot of things on your table saw.
Your shop class sounds very much like mine in the 60's.
I would have happily traded English and History class for 2 extra hours of shop class.
- RE: New sub cab builds - emailtim 08:14:13 05/24/24
(2)
Shop class was fun. 2 weeks out of the year, the girls and boys swapped classes. The girls spent 2 weeks in the shop (don't know what they did) and the guys spent 2 weeks in Home Ec trying to cook. There was some sorry looking pancakes and pizza dough from the guys that never used a stove before. =) I used an online stave calculator to get the right ID and OD.
I then tried it with a miter gauge in 2D with 3/4" stock before trying to do it in 3D with a tilt blade and long bar stock.
It is more difficult to do in 3D keeping everything square with no tilt or taper.
Also bought a relative zeroing Klein digital angle finder on sale that is supposed to be accurate to +/-0.2 degrees. Did test cuts to compare against the miter gauge.
Should have bought one of those a long time ago.
Learned a few things to improve upon next time.
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2022/03/30 Historical Records CENSORED
Edits: 05/24/24
- RE: New sub cab builds - Brad225 12:33:22 05/24/24
(1)
Funny you mention that. I remember being in Home Ec for a short time but I don't think it was related to shop.
What part of the country were you in then? I was in Michigan at that time.
Clearly every project makes for a new learning experience. Not sure I always remembered them when came around again.
- RE: New sub cab builds - emailtim 12:56:18 05/24/24
(0)
Wisconsin.
Just did a search, the school was built in 1927 and demoed in 1999.
It was 3 stories and a full basement. Shop and other classes were in the basement. Gym floor was in the basement with a running track above on the 1st floor.
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- Sausage making - emailtim 16:03:31 05/23/24
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Here are some more picts of the sausage making. Made a glue-up clamping form that doubled as a routing form.
Routed 2.25" down from both top and bottom ends which gave me a reference surface.
The router bit left the middle section proud.
Used a flush trim table saw router fence (flushed against the top and bottom reference surfaces) to shave off the proud center band.
Final step was some light sanding.
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Edits: 05/23/24 05/23/24
- lotta work and looks really nice - Story 15:52:31 05/23/24
(3)
my stepdad was my woodshop teacher in HS and he would say practice makes perfect!
- RE: lotta work and looks really nice - emailtim 16:30:28 05/23/24
(2)
I took shop in jr high and doubt they would be able to teach those classes today. Shop had drafting first, then metals, plastics and wood.
Had to take a test before doing the plastics so the kids did not screw up the machines. There was vacuum molding (magnetic signs), rotisserie molding (footballs with air valves), injection molding (golf tees) and compression molding (hard plastics like ash trays).
Metals included sheet metal, riveting, soldering using old fashioned soldering irons that were heated in open gas fired furnaces and sand casting with molten aluminum.
We made screw drivers by threading and shaping tool steel, heating it up and melting it into plastic handle stock and that was shaped on a lathe.
We had the choice of wood projects. We all had to make shelves first with a scroll saw before picking other projects. I made a folding chess board out of maple and walnut.
Today, kids would burn the place down and brand each other.
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- RE: lotta work and looks really nice - Story 18:07:26 05/23/24
(1)
LOL my first project was a small bookshelf also, after that I made large woofer cabinets
There was one kid who was always making a pot pipe and my stepdad would let him get close to finishing it and then sneak up and break it in half.
I remember going up the hallway one day to wood shop class and all of a sudden my step Dad was coming down the hall holding his bloody hand going to the nurses office.
There was a trail of blood all the way there and all over his shoes which were always polished brand new, Korean Vet. What a mess, even he screwed up once in a while.
- RE: lotta work and looks really nice - emailtim 18:33:44 05/23/24
(0)
It was fun to watch how many scroll saw blades were broken to cut a few inches of pattern for the shelf sides. We also had to hand cut dados with a hand saw and hand chisels.
Yep, always have to be on the lookout. There is a new law that may make existing table saws illegal. They are trying to force all new TS to be made with the SawStop technology which may make it impossible to sell used saws without it. It drives up the price of the saw and also prevents cutting aluminum.
My brother took shop in HS. He was able to make full size, floor standing long and handgun rack out of solid oak. It was 2 pieces. A chest with a vertical glass door show cabinet on top. It was over 6' tall and @ 4' wide. Oak was cheap back then. It turned out nice. Was quite impressed with his work.
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2022/03/30 Historical Records CENSORED
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