40 MAN. PS 254 EN – Ind. 2
Tachometer controlled closed chamber
welding heads
It is possible to adjust the rotation speed of
closed chamber welding heads with
tachometer. Find out the code of the reference
R30 for the closed chamber welding head in
the table hereabove. Enter this reference code
into the power source and validate. To start
one revolution of the head, push the sector key
SY 14. The rotation speed can be calculated
by the time the weld head needs for one
revolution.
Welding heads with home position switch
If the measured speed is included in a range of
9 % of the theorical speed, the speed will be
automatically adjusted during weld cycles. If
the speed difference is more than ± 9 %, an
arrow * or + will appear on the sceen to
indicate the correction to be applied on the
welding head.
• In the case of an arrow * showing to the
right, increase the rotation speed by
turning the potentiometer inside the
welding head clockwise.
• In the case of an arrow + showing to the
left, decrease the rotation speed by turning
the potentiometer in the welding head
counterclockwise.
• Push the sector key SY 15 again and
repeat adjustments, if necessary, until no
arrow will appear on the screen. The
speed difference is now less than ± 9 %
and corrections will be made
automatically.
Welding heads without home position
switch
After a push on the sector key SY 15, the
welding head should do a whole revolution.
If not the speed must be adjusted by turning
the potentiometer inside the weldhead:
• If the rotation of the welding head is less
than one revolution, its speed must be
increased by turning the potentiometer
clockwise.
• If the rotation of the welding head is more
than one revolution, its speed must be
decreased by turning the potentiometer
counterclockwise.
Push the sector key SY 15 again and repeat
adjustments, if necessary, until the rotation
stops exactly after one revolution.
Control of an external speed variator
It is possible to control an external speed
variator. There are two possibilities to program
the reference number R30:
• For a time base of 1/10 seconds the letter
I followed by 0,1 s has to be introduced
(R30 = I0,1s).
• For a time base of seconds the letter I
followed by 1 s has to be introduced (R30
= I1s).
The weld cycle is now controlled by time (1/10
seconds or seconds) and not by the position of
the welding head (impulse control). The
internal clock of the power source is
generating the impulse signals.
To command the external speed variator, an
interface (signal generation for start and
direction of rotation) has to be connected to
the rotation plug FA 3 of the power source.
Control of the power source by prise
manual welding head
• Use of a manual torch
R30=yyyy
, Working cycle without movements and
pulsing
, Downslope
, End of cycle
• Use of a welding head
♦ R30=yyyy C (MW40, MW65, MW115 and
MW170)
, Forward rotation of the head
, Test gas and cooling agent
, Working cycle without considering the
open position of the weld head but with the
head going back to the open position at
the end of the cycle
, Downslope
, End of cycle
♦ R30=yyyy X (other heads)
, Forward rotatio the head
, Test gas and cooling agent
, Working cycle considering the open
position of the head and with the head
going back to the open position at the end
of the cycle
, Downslope
, End of cycle
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