Rothenberger SUPERTRONIC 1250 Instructions D'utilisation page 9

OPERATING/SERVICE
(the tube of the threading head should never overhang
in a normal thread), stop the motor (Fig. 3). Change the
position of the reverse gear lever and start the motor. The
machine will begin to unscrew the head and the tube will
become free (Fig. 4).
DANGER! Once the threading process has ended,
wait until the motor and the threading head have
stopped completely before reversing the direction
of rotation.
Maintenance
Cable and plug. Both the cable and plug should be in
optimum condition. Check them at regular
ON switch. Check that the machine switch unblocks
automatically when finger pressure is released. of any
anomaly, replace immediately with a new one.
Brushes. Check frequently for brush wear and perfect
contact with rotor. Change brushes when their length is
1/3 of original length. Use original Rothenberger brushes.
In order to change the brushes make sure the machine
is disconnected from the mains supply. Open the back
brush-change lid, disconnect the brush-housing's electrical
connection, unmount the brush housing and change the
brush using original Rothenberger replacement brushes
Motor and rotor. The carbon dust accumulated in the
motor and brush housing should be removed 100 hours.
The motor's rotor should be permanently clean with an
uniform surface (light bronze colour).
Threading heads. Check that there are no damaged
teeth on the head to be used, as thread quality be seriously
deterriorated. Keep clean of swarf to achieve top quality
threading and longer life.
Gear box. Change grease every 500 operating hours.
After dismounting the machine, oil all mechanisms to
eliminate old grease. Remove parts with dry compressed
air and apply new grease with clean hands. Do not
use any dissolvents. Approximately 300 gr. of grease
is needed for a correct lubrication. An excessive
amount of grease is not recommended as it can
increase the temperature of the machine. Grease type:
LGMT2 by SKF or similar. We recommend that this operation
be carried out by an authorized after-sales service.
Tube fastener (clamp). Check that the tube fastener
clamp is in good condition. Replace when tube
displacement occurs.
ENGLISH
9
Troubleshooting
Insufficient power
- Make sure that extension cable is not too long or that it
does not have insufficient section.
- Make sure that the right working speed is being used.
- Tube clamp must be well secured (bolt parallel to tube).
- Check operating condition of threading heads.
- Apply plenty and continuous lubrication to threading
heads.
- Make sure that the tube can be screwed.
Off-centre threading
- Check position of tube fastener (shaft parallel to tube).
- Check condition and quality of tube.
Insufficient thread lenght
- Check correct positioning of tube fastener.
- Make sure that there is no obstruction between the
machine and the tube fastener.
Poor thread quality
- Check condition of teeth.
- Check that there is continuous and abundant
lubrication.
- Check quality of tube.
- Check quality of threading oil (use Rothenberger oil).
Incorrect adjustment of threading head
- Use the adapter for appropriate sizes (up to 1.1/4").
- Check that the appropriate threading head is being
used (Rothenberger, serie 600 or equivalent).
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ENGLISH
9