Never lubricate the machine
Blade free of gum and edge
Apply proper tension to blade
Never bend down to look while running
Uniform width
Straight grain
Varying thickness
Uniform thickness
Used proper lubrication
Work piece very hardness
Setting the fence not properly
Rear table not proper alignment
Check the strength
Check the hardness
Sharpening at all time
Maintenance size and shape
Check the proper depth
Check the proper height
Check the proper weight
Check the proper alignment