Sealey SUPERMIG255 - Manual (Page 5)

fig.14
6.1 The wire feed mechanism has a lower grooved drive roller and an upper
pressure roller. The pressure roller is in a separate hinged housing
which is held in place and acted upon by a pressure adjustment knob as
shown in fig.9 above. To access the drive mechanism pull the pressure
adjustment knob over to the left and allow it to hinge downwards. As you
do so the pressure roller housing will spring open to the right as shown
in fig.11 below.
6.1.1 The wire drive unit is supplied with one roller which has drive grooves
for Ø0.8mm and Ø1.0mm wire. Note that it is essential to place the
roller the right way round on the drive mechanism.
6.1.2 The roller groove size is stamped on the face of each roller adjacent
to the appropriate groove. Ensure that the groove size you require is
positioned furthest away from you so that it will be in line with the wire
feed path.
6.1.3 When changing from Ø0.8mm to Ø1.0mm wire it will be necessary to
reverse the position of the roller on its carrier. Firstly unscrew and
remove the black knurled knob that holds the roller and its carrier in
position (see fig.11).
6.1.4 Now slide the roller and its carrier off the main drive shaft as shown
below in fig.13. taking care to keep the parts together as an
assembly. Note that there is a keyway in the roller which must align
with the keyway on the roller carrier and the two components are held
together with a close fitting square key (see fig.13).
MAKE SURE ThAT ThE wIRE FEED ROLLER, ThE wIRE GUIDE hOSE
AND ThE CONTACT TIp OF ThE TORCh MATCh ThE DIAMETER AND
TYpE OF wIRE TO BE USED AND ARE FITTED CORRECTLY.
6 . SETTING Up ThE wIRE FEED
fig.9
fig.10
6.1.6 With the carrier, roller and key reassembled as shown in fig.13B,
orientate the carrier so that the keyway in the carrier itself is aligned with
the key on the wire feed drive shaft as shown in fig.12. Slide the carrier
fully onto the drive shaft and fix it in position by screwing into place the
black knurled knob previously removed.
6.2 Straighten about 50-100mm of spool wire (do not allow wire to uncoil).
Ensure that the wire is undistorted and clean cut with no burrs or sharp
points. (Note: Burrs or sharp points at wire tip may damage the torch
liner.) Gently push the wire through the flexible wire guide until it
emerges into the wire feed drive unit. Guide the wire over the roller and
into the torch fitting wire guide by 50 to 100mm.
6.2.1 Close and hold down the pressure roller housing then hinge the
pressure knob upwards and onto the housing until it snaps into
position. Set an intermediate pressure between marks 2 and 3. Turning
the knob clockwise increases the pressure. Turning the knob
anti-clockwise decreases the pressure. (See fig.9).
6.1.5 Once the carrier is free from the main drive, you can now slide the roller
off the carrier as shown below in fig.13A. Take care not to unseat the
loose key that aligns the roller with the carrier. The roller can now be
reversed or replaced as required. In either instance the required drive
groove must be furthest away from you at the back of the roller in order
to align with the wire drive path.
fig.11
fig.13
fig.12
Original Language Version © Jack Sealey Limited 2013 SUPERMIG255, SUPERMIG275 Issue: 2 (SP)- 28/08/13