- band tension too high; the lying down band rises
on the side;
- saw frame lowering too strong: the band back is
polish and upset;
- The thrust bearings are not aligned with the band
wheels: the lying band curves and the band back
is polish
and upset;
- the band guides are too tight: the lying band
spiralles up as a spring; the more the teeth are
tight, the more the
band twists;
- short coolant.
6. BENT CUTS
- Increase the band tension;
- approach the band guides to the cutting unit;
- the teeth are too thin;
- reduce the cutting pressure.
7. THE CUT IS NOT RIGHT
- Approach the band guides to the cutting unit;
- check if the cutting piece is rightly horizonataly
placed on the support table;
- control the band perpendicularity: if it is out of
perpendicularity, work on the band guides;
- toothing too thick;
- the teeth are broken or variegated;
- increase the cutting speed.
8. BAND NOISE ON THE THRUST BEARINGS
- Burr or adjust the band back;
- check the band wheel alignement;
- check the thrust bearing wear and tear;
- the welding is not perfect.
9. THE BAND CURVES POSITIVELY
- Reduce the cutting pressure;
- use bigger teeth for increasing the penetration;
- approach the band guides to the cutting unit.
10. THE BAND CURVES NEGATIVELY
- The band back strains against the upper thrust
bearing band guides; check if the space between
the band back
and the band wheel rim is always the same by
band in movement and band stopped;
- check the alignement of the band wheels.
11. SLOW CUTTING, THIN CHIPS
- Increase the bend wheels speed;
- increase the cutting pressure;
- use bigger teeth;
- use a proper coolant.
12. PREMATURE LOSS OF THE SIDE SETTING
- Reduce the bad wheels speed;
- increase the distribution of the coolant.
13. THE BAND WARPS AS A SPRING
- Reduce the cutting pressure;
- reduce the band tension;
- excessive pressure on the band guides: adjust it;
- approach the bad guides to the cutting unit.
14. THE CHIP WELDS TO THE TOOTH / CHIPS
ARE TOO BIG
- Reduce the cutting pressure
- use proper coolant and in a good quantity;
- check the wear and tear of the burst used for
clening the chips from the grooves.
15. THE BAND IS SIGNED OR SCRATCHED ON
ONE SIDE
- Check the wear and tera of band pads;
- the pads press too much against the band back;
- check the alignement and the perpendicularity of
the band guides.
16. BURR OR SWANGING ON THE BAND BACK
- Increase the tension and adjust the band guides;
- check the pressure and the alignement of the
thrust bearings on the band back;
- reduce the cutting pressure;
- use a bigger toothing.
17. THE CUT PIECE HAS BLACK DIRT
- The band back touches the lip angle and
becomes dirty;
- if the dirt is on the left side: the left band guide is
out of axle;
- if the dirt is on the right side: the right band guide
is out of square;
the dirt is on the complete cutting line: the
band guides are out of square, or: the
pressure is too high; the band tension is too
low; teeth are too thick and cannot set free
from the dirt; the used coolant is wrong
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22 - MACHINE DEMOLITION
This paragraph may give some informations about the macrooperations of machine disassembly for its
scrapping.
Special procedures are not required but it is necessary to take only some cares to avoid damages in the last
phase of the machine life.