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3.8 Top and Bottom Planer (Straight Knife Or Segmented Knives)

Considerations

  • Pre-Operation Checklist is a prerequisite for ANY operation.
  • Tool/Machine Manufacturer's safety rules and guidelines are followed.
  • Demonstrates knowledge of and proper use of all machine specific controls.
  • Material is well supported at both in-feed and out- feed tables.
  • Spot check dimensions following the operation.
  • Proper stance and hand position are demonstrated.
  • Assesses stock for suitability to determine whether the finished material size can be achieved.
  • Grain direction is correctly identified and appropriately considered for feed to reduce tear-out.
  • Similar amounts of material are removed from both faces of the board.
  • Loose chips and debris are removed from in-feed table before placement of all stock after every pass.
  • Operator clears machine and cleans work area after use.
  • Required OSHA approved personal protective equipment is worn.
  • Lock-out/Tag-out procedure is in place and followed.
  • Process is completed in a timely manner.

Pre-Operation Checklist

Level 1

Performance Standard -
  • Verifies tool is properly guarded.
  • Verifies dust collection operable/operating.
  • Ensures paths of in-feed and out-feed have no obstructions to material and operator.
  • Staggers loading to ensure entire width of bed is used.
  • Minimum part length is observed.

Level 2

Performance Standard -
  • Inspects knives for wear or defects.
  • Verifies tables are clean and polished to facilitate smooth material movement.
  • Proper stock removal rates are selected given material type.
  • Meets Level 1 performance standard.

3.8.1 - Facing and Planing

Level 1

Given material, a target thickness greater than 6 mm (1/4") [0.25], feed rate pre-selected, and machine set up and ready to cut, plane material to specified thickness.
Performance Standard -
  • Final planed surfaces exhibit minimal tear-out or chip-out.
  • Proper incremental adjustment made on each pass to reach specified thickness.
  • Sets optimum initial thickness prior to first pass based on maximum thickness or species of material.
  • Final thickness dimension tolerance is ±.0.4 mm (1/64") [0.0156"] across entire surface of material.
  • Planed surfaces are free of or have minimal snipe (taking into account what is normal for a given machine).

Level 2

Given material, a target thickness greater than 6 mm (1/4") [0.25"], set up equipment and plane material to specified thickness.
Performance Standard -
  • Verifies/sets feed speed to meet surface quality specification - 15-25 knife cuts per inch (KCPI). Variations accepted for accommodation of difficult grain patterns and materials with defects. Any tear-out must be able to be removed without excessive sanding, scraping, etc.
  • Meets Level 1 performance standard.