Husqvarna 3120XP 用户手册

English

 – 19

In most cases you can avoid these problems by cutting in two 
stages; from the top and from the bottom. You need to support 
the object so that it will not trap the chain or split during 
cutting.

The following instructions describe how to handle the 
commonest situations you are likely to encounter when using 
a chain saw.

The log is lying on the ground. There is little risk of the 
chain jamming or the object splitting. However there is a risk 
that the chain will touch the ground when you finish the cut.

Cut all the way through the log from above. Avoid letting the 
chain touch the ground as you finish the cut. Maintain full 
throttle but be prepared for what might happen.

If it is possible (can you turn the log?) stop cutting about 2/3 
of the way through the log.

Turn the log and finish the cut from the opposite side.

The log is supported at one end. There is a high risk that it 
will split.

Start by cutting from below (about 1/3 of the way through).

Finish by cutting from above so that the two cuts meet.

The log is supported at both ends. There is a high risk that 
the chain will jam.

Start by cutting from above (about 1/3 of the way through).

Finish by cutting from below so that the two cuts meet.

When limbing thick branches you should use the same 
approach as for cutting.

Cut difficult branches piece by piece.