Stock Preperation Warm-Up. Explain the difference between the USE of the JOINTER and the SURFACE...
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Transcript of Stock Preperation Warm-Up. Explain the difference between the USE of the JOINTER and the SURFACE...
Stock Preperation
Warm-Up
Warm-Up
• Explain the difference between the USE of the JOINTER and the SURFACE PLANER
Jointer
• Used 1st in the Stock Prep Process
• Straightens and Flattens the Wood– Makes STRAIGHT LINES
Surface Planer
• Used 2nd in the Stock Prep Process
• Creates a PARALLEL face to the opposite STRAIGHT face created by the Jointer
• Allows you to make the lumber whatever THICKNESS you want– Sometimes called a Thickness Planer
Warm-Up
• Explain how to fix a board that has a serious cup, BEFORE you start jointing.
Dealing with a Cupped Board
Warm-Up
• Explain how to fix a board that has a serious BOW before you use the Jointer?
Dealing with a Bowed Board
Cut Board in Half
Warm-Up
• What is the formula for calculating Board Foot?
• What is the UNIT?
Answer
• When working in ALL inches:–W x L x H/144
• Cubic Inches because it is a VOLUME measurement
Warm-Up
• What do you add to the FINISHED WIDTH, LENGTH, and THICKNESS to get the ROUGH DIMENSIONS?
Finished to Rough Dimensions
• You MUST use the ROUGH DIMENSION when figuring COST– You need 1” thick material to get ¼”, ½” or ¾”
thick stock
• Basic Rules of Thumb:– Add ½” to the WIDTH– Add 2” to the LENGTH– Add ¼” to the THICKNESS
DEPENDS ONCONDITION OFLUMBER
Warm-Up
• After using the Jointer and Planer what is the next POWER TOOL that needs to be used?
• What does type of edge does it create?
Answer
• The TABLESAW is the TOOL that is used after the JOINTER and PLANER
• It creates a PARALLEL edge
Tomorrow
• I am buying the PIZZA
• If one student, in either class, breaks a rule then NO ONE will get pizza!!
• I will make sure everyone else knows who broke the rule
Rules
• Destruction of ANY property
• No Smoking
• Not Allowed to Leave the House without Permission
• ALL school rules apply
• Grafitti
• Stealing Property, Tools or Materials
Tomorrow
• Report to the Shop at 9am
• No open shoes
• No Shorts
• Need a Tape Measure
• Need a Pencil
• Need your Safety Glasses
Warm-Up
• After using the Jointer, Planer and Table Saw, what is the next POWER TOOL that needs to be used?
• What does type of cut does it create?
Answer
• You NEED to use the Sliding Compound Miter Saw or Radial Arm Saw after the Jointer, Planer and Table Saw– Cut to Final Dimensions
• The Sliding Compound Miter Saw creates SQUARE cuts to a STRAIGHT edge
1st Things
• Finish Downhill Race Track– Chris, Kelvyn, Justin
• Clean-Up Shop– Organize– Mirrors, etc.
Tomorrow
• Same Rules Apply– Tape Measure– Pencil– No Shorts– No Open Toed Shoes
• Bring a Lunch
Warm-Up
• Why is it important to sand on the LEFT side of the Disc Sander?
Answer
Always Sand on the LEFT of the Disc:
• The Disc is spinning COUNTER CLOCKWISE so it will push the Work Piece INTO the table
Warm-Up
• What limits the size of the work piece you can sand on the Belt/Disc Sander?
Answer
• The WIDTH of the Belt
• ½ the DIAMETER of the Disc
Warm-Up
How deep do you make a finger joint?
Answer
The DEPTH of the Finger Joint is determined by the THICKNESS of the material being joined
Warm-Up
•Why is a DOVETAIL joint better than a FINGER JOINT?
Answer
• A Dovetail Joint is stronger than a Finger Joint because it can ONLY be pulled apart in ONE DIRECTION
Warm-Up
• What is the difference between a DADO, RABBET and a GROOVE?
Dado
• U-Shaped Recess ACROSS the GRAIN
Rabbet
• L-Shaped Recess
Groove
• U-Shaped Recess WITH the GRAIN
Warm-Up
• Explain the importance of DRY assembling your project BEFORE final assembly
Importance of Dry Assembly
• Check to make sure ALL measurements are correct
• Check to see if everything fits
• Gives you time to make correction
• Gives you PRACTICE at assembling project– Figure out how to clamp it, etc
• Gives you a chance to take measurements
Warm-Up
• Why is it important to NEVER sand an edge that will be joined to another face or edge?
Answer
• A machine cuts a SQUARE and STRAIGHT edge
• You CANNOT hand sand an edge PERFECTLY SQUARE or STRAIGHT
Warm-Up
• Explain WHERE and WHEN you would use the following Joints:–Rabbet
–Dado
Joinery Uses
• Rabbet: – simple case construction– Joining at 90 degrees– Conceals End Grain– Prevents movement in 1 plane
• Dado:– Mount Shelves in Cabinets and Bookcases– Joining at 90 degrees– Prevents movement in 2 planes
Warm-Up
• Explain WHERE and WHEN you would use the following Joints:–Dovetail
–Groove
Joinery Uses:
• Dovetail:– Reinforced Joint– Prevents movement in ALL planes– Drawers, Case Construction, Knock Down
Furniture
• Groove:– A U-shaped Slot WITH the grain– Drawer or Case Bottoms– Prevents movement in 2 planes
Warm-Up
• What is the difference between a POSITIONED, NON-POSITIONED and a REINFORCED Joint?
NON-Positioned Joint
• Two components meet without any position or locking effect
• Only glue or fasteners hold the joint
• Weakest
Positioned Joint
• One or both components have a machined contour that holds the assembly in place
• Nails and Glue help to strengthen joint
• Stronger than NON-positioned joints
Reinforced Joint
• Additional element besides glue that helps hold the joint together– Dowels, biscuits, splines, glue blocks, nails,
screws, etc.
Warm-Up
•What is the difference between a Half-Blind Dovetail and a Thru-Dovetail?
Half-Blind Dovetail
• Used on Drawer Boxes and Case Construction
• Conceals the End Grain on one Side
Thru-Dovetail
• Stronger
• Shows End Grain on BOTH sides
• Case Construction
• Decorative
Warm-Up
• List the 3 MOST important stationary power tools used in stock preparation
Stock Prep Tools
• Jointer–flattens and straightens
• Surface Planer–makes opposite FACE parallel to
jointed FACE • Table Saw
–makes opposite EDGE parallel to jointed EDGE
Warm-Up
• Explain the difference between HEARTWOOD and SAPWOOD
Heartwood
• Inner Portion of a Tree
• Usually Darker
• More Stable
• More Expensive
• Dead part of a living Tree
Sapwood
• Outer Portion of a Tree
• Usually Lighter
• Less Stable
• Less Expensive
• Living part of a Tree
Warm-Up
• Name 3 Tools you can use to create a DADO joint
Tools for creating a DADO
• Router– Need Fence or Straight Edge
• Sliding Compound Miter Saw– Need Jig and Depth Stop
• Table Saw– Need Dado Blade– Miter Gauge or Sliding Table
• Radial Arm Saw– Need Dado Blade
Warm-Up
• What is the difference between a STACKED Dado Blade and a WOBBLE Dado Blade
Answer
• Stacked Dado Blade – Has several cutters that you “stack” together to create the width needed
• Wobble Dado Blade – has ONE blade that you mount at an ANGLE to create the width needed
Warm-Up
• Which HANDSAW would be the best to use if you needed to cut a DADO by hand?
Answer
• The BACKSAW is the best tool to use to cut the shoulders of the DADO by hand
Shoulder Cut
Warm-Up
• After applying a coat of shellac AND allowing it to dry, what do you do next?
Answer
• Scuff Sand with 220grit–Very Lightly
–Finish should powder (become white with dust)
Warm-Up
• When using the Chisel to remove material, which way should the BEVEL of the chisel face?
BEVEL
Answer
• The BEVEL should ALWAYS face down or to the WASTE side of the cut
Warm-Up
• List the machines you should use to sand your project in order of use–Most Aggressive to Least
Aggressive
Sanding Machines
1. Belt Sander or Belt/Disc Sander
2. Random Orbit Sander
3. Dual Action Sander
4. Hand Sanding with Wooden Block
Warm-Up
• Why is it important to use the correct Sanding Machine and Sandpaper to sand your project?
Answer
• Saves you time
• Better Job
• Doesn’t Ruin your Project
• Better Finish