Werbung
Verfügbare Sprachen
Verfügbare Sprachen
FR 4-1 REMOTE CONTROL UNIT
Fig.15
The FR4-1 is used with manual electrode and TIG welding.
Since a pre-set amperage is not always ideal for the entire duration of a
welding task, pulsating direct current is often used, so that the welder can
continue welding without having to alter the current setting. For example,
when pipes are being welded in cramped conditions, the amperage often
needs to be corrected. Should temperatures rise too high, there is a danger
that liquid metal will begin to drop from the welding pool. Too low, and the
workpiece material will not melt sufficiently.
Function: A relatively low welding current (pulse current I
steep up-slope to a considerably higher value (pulse current I
again after a pre-set period (pulse current time t
current I
), a process which repeats itself over and over again. This is only
2
possible when a specially de-signed current source is used.
During this welding process, small sections of the weld zone melt and
solidify quickly. A seam of this type is thus considerably easier to manage
than one with a large welding pool. This technique is also used for TIG-
welding thin sheet metal. Each fusion point overlaps the next, thus forming
a neat and regular seam. When the TIG pulsing technique is used for
manual welding, the welding rod is applied at each current peak.
Description of pulsed arc operating mode
For this operating mode the tumbler switch
position. The pulse current I
MAX by means of the dial
. The corres-ponding pulse current time t
be preselected (from 0,1 to 2 seconds) using the control dial situated
immediately above this
. The LED control lamp
the presence of pulse current I
. The dial
1
current I
(basic current) as an absolute value from MIN to MAX. The
2
necessary pulse current time t
2
background current is indicated by the LED control lamp
Description - standard operating mode
For this operating mode the tumbler switch
to the
position. The pulse function is thus deactivated and the remote
control unit operates using continuous current. The LED control lamp
lights up and remains ON. The welding current may be steplessly adjusted
from MIN to MAX using the regulator dial
Connection of remote control unit: see FR1-1 remote control unit
) rises via a
2
) and drops
1
) to the basic setting (pulse
1
must be switched to the
can be steplessly adjusted from MIN to
1
lights up to indicate
is used for adjusting the pulse
is fixed by means of the dial
.
must be shifted
.
WELDING START-UP
Fig. 16
Procedure for initial adjustments
- Plug in mains plug.
- Shift the mains switch
- The control lamp
- The air fan should be operational: (check that air is being emitted at the
rear of the machine).
- If necessary, connect a remote control unit
- Plug the welding cables (the type depends on the type of electrode used
- take care to act in accordance with the manufacturer's instructions)
into sockets
and
(recommended Ø: 35mm
- Preselect welding current
- Set arc force control dial
- Welding may now be started
WELDING
Settings
Table 2 gives the ampacity limits for the most important electrode diame-
ters, as well as rules of thumb for calculating them. The values given are
only valid for unalloyed and low-alloy core rods and for the stated electrode
lengths. For root-welding, vertical-up and overhead welding the welder
should use the lower limit. For fillet-welding in horizontal and flat positions
can
1
and also for vertical-down welding, the amperage is set near to the upper
limit.
d
Diameter
mm
. The
I
Length
mm
I
Amperage
A
Rule-of-
min.
thumb for
max.
amperage
Table 2
Amperages, as dictated by electrode diameter
11
from "0" to "1"
indicates that the machine is operational.
and secure by turning in a clockwise direction.
).
2
3.25
350/450
90-150
180-270
20 x d
30 x d
40 x d
50 x d
5.0
6.0
450
450
220-360
35 x d
60 x d
Werbung
