28/11/02-\\SERVER\TECNICO\-SNZ\0Sit\hVtf500shie.doc-Scheda Identificazione Codice Padre (mac.sott.etc...)-
29 di 62 pagine.
Pagina
n°-
29
63NDA
12 - DEFECTS LOCALISATION
The solution of most of the inconvenients that
could happen during the work can be find by
consulting this paragraph.
The first part concerns the machine working and
includes a list of the possible defects with relevant
controls that have to be made;
The second part concerns the inconvenients that
can be found by checking the band and / or the
cut pieces.
If your problem is not included in or you need the
presence of qualified technicians , please get in
touch with the manufacturer or the reseller by
keeping this instruction book .
12.1 - MACHINE DEFECT
Inconvenients
Check
A* Electric motor does not work ( for the band )
3-4-5-9
B* Electric motor does not work ( for hydraulic
central station )
1-2-3-4-5-9-17
C* Electronic control does not start
6-7-8-9
D* Hydraulic circuit is not under pressure
10-11-12-13
E* Noisy hydraulic pump
14-15-16-17
F* Missing / lacking cooling
18-19-20-21
G* The piece to cut moves or is being deformed
22-23
H* The machine don’t start to cut (SHI models)
25
Parts list to control
1 = Plug is right insert in the socket
2 = The main switch is off
3 = The motor is damaged or blown
4 = Incorrect electric feeding
5 = Locked transmission ( seizure, oxidation , etc.
)
6 = The fuse is in the primary transformer circuit
7 = The fuse is in the secondary transformer
circuit
8 = The transformer is blown or breakdown
9 = The connection terminals of the feeding wire
10=The tank oil level
11=Pipes and / or connections loss
12=The adjustment valve screw of the maximum
pressure is loosened
13=The maximum pressure valve is broken
14=Hydraulic oil quality ( consumed, too much
liquid )
15=There is some water in the oil and/or there is
some condensate in the tank
16=Too high circuit pressure ( over 20 BAR )
17=Locked hydraulic pump ( seizure, expansion
,oxidation)
18=The circuit taps are closed
19=The cooling filters are obstructed or must be
cleaned
20=The electropump does not work ( see 3-4-5-9-
24 )
21=The tank is empty or durty
22=Excessive cutting feed
23=The vice is not closed enough , the piece is
not right clamped .
24=The control LUBRICANT OFF is in action.
25= The limit switch placed under the vice isn’t in
the right position
12.2 LIST OF PROBLEMS- CAUSES-
SOLUTIONS OF THE BAND
In case of broken teeth , broken bands or short
band life, please laid out the broken band on the
floor and check the body or teeth defects; look for
them in the following list and read the solution of
the cutting problem .
1. PREMATURE AND EXCESSIVE TEETH
WEAR AND TEAR
- thrust pressure to short : increase it;
- reduce velocity of flywheel;
- short cooling jet;
- improper cooling emulsion;
- improper band running-in;
- teeth go to the opposite cutting direction: reverse
the band.
2. BAND VIBRATION
- increase or reduce flywheel velocity;
- dull vibration : increase band tension;
- too coarse teeth for piece being cut;
- vibration reverberated in the base; reduce
cutting pressure;
- vibration can be due to the high frequence ;
increase the head lowering ;
- incorrect locking material;
- use a variable pitch or a right teeth.
3. BROKEN TEETH
- too coarse teeth for section being cut;
- incorrect locking material;
- improper cooling;
- inadequate cooling;
- too high cutting pressure; check chip;
- too low flywheel velocity;
- overload groove of cut material