Cause
Blade tension is too high.

Solution
Check the blade tension and reduce it if necessary (see Adjusting blade tension (p. 57)).

Cause
The blade is slipping on the blade guides.

Solution
Make sure the blade guides turn freely.

Cause
The blade is slipping on the band wheels.

Solution
Replace the drive belt.
If necessary, machine the band wheels to reduce their outer rim so the blade rests on the rubber and not on the metal.

Cause
There is not enough lubricant on the blade.

Solution

• Check the blade lubricant flow and increase it if necessary.
• Make sure the lubricant outlet is correctly positioned.