December 1/09 Minutes

December 1, 2009 Rick, Paul, J Hiltz, J MacLean, Naq, Miles, Wilson, Lawrence, Roy


Mr. Hiltz and Rick and Chris have made good progress on the bucket, most with the turning completed.
Paul started a new one and has yet to turn it round.
Leo Discussed making a long straight edge.
Use two boards of equal thickness and width.
Joint each edge of each board on the jointer until all faces of each board can be interchanged with a perfect joint fit. All edges must all fit perfectly when aligned.
Leo discussed jointing (flattening) the top of a workbench.
Make the straight edges.
Flatten the end members first..

Then lay the straight edge lengthways down the length of the table along the first board suspended on two blocks of identical height. Use a feeler block and slide it under the straight edge and the first board and plane off any high spots on the bench top. Repeat this process for each board until the top is flattened. The feeler block is tapered slightly to insert it under the straight edge and a pencil mark across it is used as the register for exact alignment.

A wooden plane with a slightly concave sole works best for this job.

Minutes November 17/09

November 17,2009 Rick, J Hiltz, J MacLean, Paul, Wislon, Roy, Chris

More work on the bucket.
All hands having trouble establishing correct jointer angle.
Paul’s bucket was too thin to turn as it was out of round and to turn it on the lathe would sacrifice too much wood.
Rick was missing a few staves.
Jim Hiltz's was oval in shape, as was his abdomen.

Minutes Nov 3/09

Nov 3/09 Rick, J Hiltz, J MacLean,Chris,Paul, Mles

Drawing a circle and dividing it into 5 segments: See phooto in the album

Draw circle

Draw diameter C-F

Draw A-B using radius and starting at point G

Draw D-C (E-D =C-D)

Use E-C to mark off 5 segments on the circumference

Leo reviewed the math involved in the staved bucket project.Using a stop mechanism behind the jointer fence is a way to get accurate angles.

(See photos)

Leo reviewed some complicated material on measurement standards dating back before we ever established this woodwork club!

Leo demonstrated the cutting tool made from an Allen wrench for cutting the groove in the bucket bottom.

Leo demonstrated some jigs he made up to support the bucket for the turning process.

Tapered Bucket (cooper) project

Bulletin

Next meeting is Tuesday, November 3,2009.

This is a week earlier due to unavoidable circumstances .

Minutes October 27/09

October 27,20009

Miles, Lawrence, Paul, Frank Chiasson, Jim Hiltz,Chris

We reviewed the angles and formulae for the project again.

Leo talked us through the process of turning the bucket on the lathe once it is glued up.

A temporary top and bottom will be glued in place to provide for mounting with the chuck.

The outside will be turned round .

A flat will be cut to allow the steady rest to be placed.

The one end will be removed and the inside will be rounded.

Another temporary piece of wood will be used to remount the piece on the chuck from the inside and the outside will be rounded and lastly a groove for the bottom will be made.

An allen wrench has hard steel and can be shaped into a cutter to do the groove.

Paul's planer..click photo to see album and then click slide show

Paul's Planer...before and after

Minutes October 13/09

From Tapered Bucket (cooper) project

October 13, 20090 Paul, Rick, Miles, Lawrence

Leo re-explained the math of doing the stave taper, slope and bevel angles of the bucket project.

eg for a 32 stave bucket:

360/32 is 11.25 degrees;

each side is then 11.25/2=5.625 degrees

5.625/90 (degrees)=.0625

.0625 x 80 (for a 10 degree slope) =5 degrees

.0625 x 85 (for a 5 degree slope) =5.3125 degrees (or 90-5.3125, which is 84.6875 degrees)

These are the bevel angles for each stave

To gage the thickness of a turning, use an inside caliper, then an outside caliper at the same level, subtract and half this to get the thickness of the turning.

Tapered bucket (Click for a video)

September 29,, 2009

Attendance: Chris, Paul, Rick, Hiltz, Miles

Leo demonstrated how to calculate the angles needed to make a tapered bucket..the next project.

The first step is to make a drawing of the project.

Draw a large circle representing the largest diameter (top) of the bucket and inside this draw a smaller circle, representing the smaller diameter(base) of the bucket.

Draw diameters representing the total number of segments you want: eg two diameters is four segments, four is eight etc.

Measure out the width of the segments from the diagram.

Cut these a little over sized using a taper jig (10 degrees)

The jointer is used to do the bevels.

Two passes on each side generally do.

Calculating the bevel angle:

360/# segments

eg 360/24=15

15/2 is 7.5 degrees (each side)

7.5/90 is 0.083

The slope will be 10 degrees

0.083 x 10 = .83

The angle needed is 8.3 degrees

See utube http://www.youtube.com/watch?v=3z4dMBNCSAg

Also this :

The chord of a segment of a curve =2 times radius times sin (central angle /2)
Say the bucket top is 16” inside diameter with 12 staves
A circle is 360 degrees, so the central angle for each stave is 30 degrees (360/12)
The radius is 8” or half the 16” inside diameter.
So, the inside measurement of each stave top is 2 times 8 times sin (30/2) = 4.14”
Say the bucket bottom is 12” inside diameter. The central angle is still 30 degrees.
The inside measurement of each stave bottom is 2 times 6 times sin (30/2) = 3.11”

The stave angle is half the central angle or 15 degrees for 12 staves.

Angles calculator

Rick MacDonald brought this web site to my attention.

May 26/09 meeting

May 26/09

J Hiltz, Rick, Wilson, Chris, Paul

Tonight we completed the drilling and tapping of the holes for the end pieces. We hand tapped the holes and then tapped in the half inch threaded rod using soap as a lubricant. File off a groove on opposite sides of the end of the rod. This allows it to cut and enter cleanly.

Once the rod is threaded through the pieces, one end had a bolt welded on and the other end two bolts so that it can be disassembled if need be.

Leo discussed the strength of various thread patterns.