Wood Shop Additional - Joinery Puzzle
Samples: (What to have as examples for students to see)
Finished example using 30 mm x 30 mm x 180 mm pieces (so they are not templates for student’s project)
Student Supplies (one set per student)
(1) 20 mm x 20 mm solid stock at least 380 mm long
Project Storage Bag (same ziplock bag at least 8 ½” x 11” - used the whole year for each project)
Resources (Tools and Equipment)
Layout tools (pencil, straight edge, measuring tape, square)
Cross-cut (fine tooth) panel saw or back saw
Chisel (less than 10 mm wide)
Chisel (less than 20 mm wide)
Mallet (wooden or rubber)
Sanding block with 180 grit sandpaper
Files (assorted) and File Card (for cleaning file)
Band Saw (Tool License)
Other Information for Teacher
This project requires the student to learn from watching a YouTube video. A “viewing guide” is provided to assist the student with careful observation.
Challenge
You will see something being made on a YouTube video (or watching someone else work in the shop) and want to learn how to make it yourself. This project requires you to carefully observe the YouTube video to create you steps to complete the project.
Inspiration: YouTube Link: https://youtu.be/mTRaA6pYaXI?si=w5Y1VCien3EskOgD
Evaluation
The purpose of this project is to develop observational skills to become able to learn from watching. There are no step-by-step instructions, so you will have to create your own steps to follow. Presentation: You will present your project and your step-by-step instructions as part of your self-evaluation to your teacher. Your project may be put on display within the school and photographed for the school website.
CTF Curriculum Outcomes
1. I explore my interests and passions while making personal connections to career possibilities.
5. I plan in response to challenges.
6. I make decisions in response to challenges.
Learning (*requires Tool License)
Hand tools (metric measuring, files, file card, sanding blocks/paper)
Power tools (band saw* - optional)
Wood (material)
Use metric measurements for layout
Student develops their own plan of step-by-step instructions
Questions (to ask when assessing project with student - relate to CTF outcomes)
How did you …?
How did you …?
Why did you …?
Instructions
https://youtu.be/mTRaA6pYaXI?si=w5Y1VCien3EskOgD
You will need to make notes when watching to create your own step-by-step instructions. (Your notes will be handed in with the project as part of your self-assessment.)
Viewing Guide - the guide below will help you notice what is happening during the video. (This viewing guide will show you how to use tools to make the project. You will still need to write out the step-by-step instructions for yourself.)
Step 1 - Learning by watching
Watch the video Japanese Joinery Puzzle,
Re-watch the video and make notes about the steps the woodworker does to complete the project.
Read the Viewing Guide (below) and revise your notes.
Watch the video to be sure you know what to do.
Step 2 - Materials
Present your notes to your teacher and receive your project wood.
Make sure you ask any clarifying questions before starting.
Step 3 - Step-by-step instructions
Follow your notes as instructions to make the project.
Step 4 - Evaluation
Present your notes (step-by-step instructions), project, and self-assessment to the teacher.
Viewing Guide
Not shown, the video does not show the three pieces being cut to length. (In our class the length of each piece will be 120 mm.) The Video Guide below refers to our class project measurements with 20 mm and 10 mm cut-outs.
Not shown, you need to print your name on the end of each piece of wood (and store it in your project bag). Put your name on the end so it is easy to sand off later.
The measurement for where the cut-outs will be is never shown in the video (or the additional drawing). You will have to use math skills to locate the cut-outs in the middle of the length of wood.
0:45 Once the cut-outs are drawn - the area to be removed has a couple scribble lines to show what has to be removed (and prevent confusion from removing the wrong part). Make sure you are only marking on your wood with a (sharp) pencil. Do NOT use a pen that could soak into the cells of the wood. (The woodworker does use a felt pen for the parts that will be removed.)
1:14 The woodworker should clamp the piece to the bench when sawing.
1:37 Notice the cut is made so the saw blade is “flat” - the cut is to 10 mm deep. The cut is the same depth on both sides.
1:38 Notice the cut is made on the “inside” the line - on the side where the material will be removed. This way later the woodworker can cut more away to make the pieces fit. (You can never add wood later, so better to cut a little on the waste side of the line.)
1:39-1:50 Even though the saw is tilted during the cut, the final cut is always with the saw flat (so the depth is 10 mm all the way across the board).
2:08 Notice how the block is clamped to the bench to keep it more secure than trying to hold it with your hand.
2:09 Notice the chisel is smaller in width than the piece being removed.
2:14 Notice smaller pieces are taken out each time. (Do NOT try to remove all the wood with one chisel cut.)
2:27 Cleaning the surface is done with the flat back of the chisel against the piece.
2:32 Notice again when cutting the 20 mm piece out, a chisel slightly smaller in width is used. (And multiple cuts are made with the chisel - not just one big cut.)
Not Shown, in the next part the woodworker is trimming the cut-outs to have the pieces fit together. No trial fitting is shown. You will trial fit the pieces together to see if you removed enough material for the pieces to slide together. You could choose to file or sand the material away. The woodworker shows how to remove just a small amount of material using a chisel to make the pieces fit.
3:33 Notice how a second block is clamped above to have a straight surface for the back of the chisel to slide along and make the joint square.
5:22 Trivia Time - Notice the back of this woodworker’s chisels are not flat like ours are in the class. You see a black oval recess on the back of the woodworker’s chisels. Why do you think that chisel is different?
6:32 - The woodworker uses a wooden pull plane to finish each side. You see a thin shaving of wood removed each time. This changes the outside dimensions of your wood, so be sure any planing, scraping, or sanding of the sides is done BEFORE trial fitting the pieces together. (Your wood has already been planed - so you will not plane the wood any smoother. You may be sanding or scraping the wood to remove pencil lines - so make sure the sanding is done before trial fitting.)
6:59 Notice how the plane is set on the bench (on its side), so the blade is not damaged by setting the plane flat. (You will not be planing your wood, but it is a good habit to set tools down carefully to avoid damaging the tool.)
7:13 Notice the fit of the pieces. Each piece slides onto the other piece with gentle pressure. Not too loose, and not too tight.
For our class use 120 mm long pieces that are 20 mm x 20 mm. (So the 30 mm shown change to 20 mm, and the 15 mm shown changes to 10 mm. The length of each of your pieces will be 120 mm.)
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