Jointer student


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Jointer student

  1. 1. Woods Machine Safety# 2 Jointer
  2. 2. Purpose of the Jointer Joint the first rough Face of a board Joint the first rough Edge of a board Always joint the Face first Always joint the Edge first Outcomes  Makes the first Face and Edge  Makes the first Face and Edge  Creates a corner between the first Face and first Edge.
  3. 3. Guards are the most important part!
  4. 4. Main Parts of the JointerTable Table Power Switch
  5. 5. Main Parts of the Jointer 8” Cutter Head 12” Margin of Safety
  6. 6. Main Parts of the Jointer Fence Lock Fence Angle Lock NEVER TOUCH
  7. 7. Main Parts of the JointerMore parts that students should NEVER TOUCH Table Adjustment Lock Table Adjustment Lever
  8. 8. Personal Safety Preparation Always wear safety glasses when operating any machine. Remove exposed keys or cell phones and any other items that could get caught in the machine. Tape measures should also be removed. Always tuck the front half of your shirt while operating the jointer.
  9. 9. Jointer Safety Tools Combo Block Push Block Push Stick
  10. 10. Minimum Length- 12”This size is directly related to the overall Margin of Safety.
  11. 11. Minimum Thickness- 1/2”
  12. 12. Maximum Depth of Cut- 1/8”
  13. 13. 8” Cutter Head Cutter Head rotates clockwise when looking at it from the front of the machine. This means that it is rotating towards the Infeed Table.
  14. 14. Margin of SafetyMargin of Safety 12” totalMargin of Safety 6” on eachside of the Cutter Head. Cutter Head
  15. 15. Body Position People should never be directly behind or in front of the Ends of a board. This includes the operator or anyone else in the shop. This applies to the Infeed and Outfeed table. This rule is in place to avoid possible injury to anyone due to Kickback. It is the operators responsibility to make sure this area is clear.
  16. 16. More Safety Considerations Always use a Metal Detector to check wood for metal that could be inside and not visible. Make sure the Guard is operating properly by pulling the Guard back slightly and allowing it to snap back towards the Fence. Check the Guard only when the Cutter Head is not moving. Do not use and tell instructor immediately if the Guard is not working properly.
  17. 17. Reasons Why the Jointer is Dangerous The Cutter Head runs at a very high RPM. The Cutter Head blades are extremely sharp. The Cutter Head is exposed as the board is exiting.
  18. 18. Fence LockAlways make surethat the FenceLock is locked bymaking sure it isjust snug.
  19. 19. The 2 Adjustments an Operator Can Make The student can loosen and tighten the Fence Lock in order to move the Fence into the correct position The Infeed Table Height Adjustment can be moved by an operator. But, in our class the students will never adjust the Infeed Table height. Only the instructor will ever adjust the Infeed Table.
  20. 20. Face Jointing- Fence Adjustment Move the Fence up far enough to cover extra Cutter Head but wide enough to allow your board to pass through. Always run your board through with the machine off (Dry Run) so that you know that your board will make it through. This is important because your board may be wider at one end.
  21. 21. Always Joint the Cupped Face INCORRECT CORRECT
  22. 22. Other Face Defect Issues Always joint the Bowed Face Always get instructor assistance when trying to joint a Twisted board When these rules conflict each other, use the most stable Face. Stable means that the board should not rock or shift while cutting.
  23. 23. Face Jointing- Hand Placement Make sure all Push Blocks that your intend on using during your cut are within easy reach. Your left hand (leading hand) will start with a Push Blocks in contact with the top of the board a few inches back from the End. When jointing the Face of a longer board you must use your right hand to feed the wood. When your board reaches the end of the Infeed Table, you will pick up your Combo Block, hook it on the End of the board, and use it during the rest of the cut. When picking up the second Push Stick, make sure that your left hand and Push Block are not moving and are not inside of the Margin of Safety.
  24. 24. Face Jointing Short Boards- HandPlacement The operator can start with a Combo Block in the right hand, and hooked on the End of the board. If the board is long enough, you can use a Push Block in the left hand to help guide the wood. If the board is very short (minimum 12”), only use the Combo Block. You must use both hands on the combo block handle. Always use a Combo Block and Push Block when moving your hands through the Margin of Safety. Never have your hands in contact with the board while moving through the Margin of Safety.
  25. 25. Edge Jointing This is the 3rd step in the 6 step process Make sure to loosen the Fence Lock Handle and bring the Fence as far forward as possible to reduce the amount of exposed Cutter Head. Make sure that the Fence is relocked before continuing. Then make a Dry Run while the machine is off.
  26. 26. Edge Jointing with DefectsCrown Down, wood not stable Crook Down, wood is stable INCORRECT CORRECT Flip 180 deg. to correct.
  27. 27. Hand Placement A Push Stick and Push Block need to be used on any board that is not wider than 6 inches. If the board is wider than 6 inches, then the operator can use their hands to feed the board through. All parts of your hands must remain above the Fence even when jointing a wide board.
  28. 28. Body Placement Always stand in an upright position, never lunge or lean. Use small shuffled steps and move with the wood as you joint it. Always use consistent and smooth pressure. Keep your arms straight and your body close to the machine. This allows you to use your body weight to help feed the board.
  29. 29. General Machine Rules Tuck in you shirt. Operator is responsible for keeping other people out of their Work Area (Arm’s Distance) Make sure machine reaches Full RPM, The noise stops changing. Make sure that the Cutter Head stops moving before leaving the machine. Clean up area: push tools, tools, and pieces of wood.
  30. 30. Jointer Wrap-Up Jointing makes the surface flat. Jointing improves a Rough Sawn finish.
  31. 31. Jointer Wrap-Up Step 2 (Jointing the cupped face) and Step 3 (Jointing the crooked edge) create a Square corner along the length of the board.