Transmig 210, 250, 310, 330
DOC No: MIGTRN0001 Page 19 of 31
Issue No: 2 Date: 14/09/98
6.14 Wirefeeder Driver Roller Pressure Adjustment (Compact Models & 2R
Wirefeeder Only)
The moveable roller applies pressure to the grooved roller via screw adjustable spring pressure. The
adjustable spring screw should be adjusted to a minimum pressure that will provide satisfactory wire
feed without slippage. If slipping occurs, and inspection of the wire contact tip reveals no wear,
distortion or burn-back jam, the correct feed roll groove size is used, the feed roll groove is not
worn, the conduit liner should be checked for kinks and clogging by
metal flakes and swarf. If this is
not the cause of slipping, the feedroll pressure can be increased by rotating the adjustable spring
screw clockwise. Excessive pressure may cause rapid wear of the feed roller, motor shaft and motor
bearings. Refer to CAUTION 7.
6.15 Wire Reel Brake (Compact Models & 2R Wirefeeder Only)
The wire reel hub incorporates a friction brake which is adjusted during manufacture for optimum
braking. If it is considered necessary, adjustment can be made by turning
the large nut inside the
open end of the wire reel hub. Clockwise rotation will tighten the brake. Correct adjustment will
result in the reel circumference continuing no further than 20mm after release of the Torch trigger
switch. The electrode wire should be slack without becoming dislodged from the reel.
CAUTION 6: Excessive tension on the brake will cause rapid wear of mechanical wire feed
parts, overheating of electrical componentry and possibly an increased incidence
of wire Burnback into the contact tip.
7. TWECO MIG TORCH (P/N 717578 where supplied)
7.1 Introduction
The TWECO 250A gun fitted to the Transmig offers robust construction, unparalleled reliability and
easy replacement of consumable parts. The TWECO 250A has an operating capacity in excess of
the capacity of the Transmigs and can be expected to give trouble free service.
TWECO MIG Torches may be fitted to many different types of MIG welding plants so that your
whole shop can be converted to TWECO. Not only will this give greater reliability (and hence
greater productivity), but it will reduce stockholdings of consumable parts. See your CIGWELD
distributor for details.
CAUTION 7: Genuine TWECO contact tips and lines should be used. Many non-genuine liners
use inferior materials which can cause wire feed problems.
7.2 Torch Consumable Parts
NOTE 1: * denotes parts that are supplied as standard with MIG torch 717578.
a) Gas Diffusers
Part No. Part No.
* EL52
(slide on nozzles)
EL52CT
(screw on nozzles)
Table 3 - MIG torch gas diffusers
