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Troubleshooting Tips

To get the highest performance for your Planer

If clip or snipe appears on the front end of board

  • Top head chip-breaker not holding stock down
  • Bottom head lower than platen after cut
  • In-feed rolls set low
  • Pressure bar  too high of front end
  • Platen before bottom head not level

If clip or snipe appears on the rear end of board

  • Pressure bar too high on front end
  • Bottom head lower than platen after cut
  • Platen before bottom head not level

If clip or snipe appears on the left edge of board

  • Board is not being held against guide. Check the bottom in-feed rolls for level
  • Not enough spring pressure on the left side head chip-breaker
  • Guide nose not in line with long guide, also not held rigid
  • Guide after side head is not in line

If clip or snipe appears on the right hand edge of board

  • Guide after cut is back of side head cut
  • Guide after cut not square with long guide
  • Board not traveling straight after cut, causing end to swing into cutter head
  • Guide after side head not mounted securely

If chip marks appear on the lumber

  • Adjust the scraper on out-feed roll
  • Shaving exhaust system not enough suction, due to leaks, not correct size, piping at to great an angel to main pipe
  • Too fast a speed
  • Shaving hitting some obstruction and bouncing back at cutter
  • Incorrect bevel on knife
  • Wire edge may have been left on knives when jointing
  • Too light of a cut
  • Moisture content too high
  •  Raised top out-feed roll

If lumber varies in thickness across board

  • Cylinder not level with platen
  • the pressure bar not level with cylinder
  • Knives not being jointed straight, check jointer
  • Platens may be worn

Washboard finish or revolution marks

  • Check knives to make sure all are cutting
  • Knives unevenly jointed—joint may be too heavy on one or two knives
  • Lumber not held firm—check chip-breaker and pressure bar
  • Check cylinder and heads for unbalance- also knives should be checked for balance
  • Trouble could be caused by bad bearings in the planer
  • A hard or soft knife
  • Bed plate worn

If lines appear at right angles to knife marks, or finish is flaky

  • Knives may be nicked or checkered by using to hard a jointer stone
  • By moving jointer stone too fast across knife
  • Jointer slide loose on bar
  • Chips or slivers may have become wedged between roll and table
  • Coastal pressure bar may be too tight
  • Jointer slide loose on bar

If stock pulls away from the planer guide

  • Guide out of line
  • Bottom rolls worn or low on guide side
  • Pressure bar too tight on left hand side of board
  • Bottom head lower than platen after cut on the left side
  • Ends of lumber out of square

If stock twists in machine

  • Pressure bar too tight on one side
  • Top out-feed roll not parallel
  • Top out-feed roll may have uneven spring tension
  • Bottom feed rolls may not be parallel with bed plate

If stock hesitates or stops in machine

  • Too much down pressure on chip-breaker
  • Pressure bar too tight on stock can be due to knife wear
  • Bottom rolls too low
  • Guide after side heads too tight
  • Side head hold-downs too tight
  • Not enough down pressure on the hydraulic roll tension
  • Bad hydraulic pump or motor in feed works—check pressure on each pump system

Knives raising the grain

  • Excessive Feed roll pressure
  • Heavy pressure bar force
  • Knives may be too dull
  • Moisture contact too high
  • Cut is too heavy
  • Feed may be too fast
  • Cutting angle may be incorrect
  • Joint may be too heavy or heel is too wide

Fuzzy Grain

  • High moisture content
  • Dull knifes
  • Low feed speed
  • Small depth of cut
  • Incorrect cutting angles

Noisy Machine - Vibration and Pounding

  • Knives may be too dull
  • Feed belt may be jumping on pulley
  • Variable feed belt jumping
  • Pressure bar set below cutting circle
  • Machine may not be on solid Foundation
  • Machine may not be level

Throwing Knives Out of Heads

  • Gibb screws tightening out of sequence
  • Not tight enough
  • Screws are dirty
  • Screws are mushroomed

Motor kick-out

  • Knives may be dull and overloading motors
  • Pressure bar may be set too low, putting drag on motors
  • Motor may be drawing high current because other machinery in use in the plant has pulled down voltage – check line voltages
  • Machine may be out of adjustment
  • Lower rolls may be set too low
  • Joint may be too heavy
  • Feed speed too low or high
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