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
