MK Products Copperhead Weldhead - Manual (Page 19)

CopperHead ® Owner’s Manual - Page 11
hands to manipulate parts within the weldhead, which requires the use of a
Benchmount. This Benchmount (P/N 005-0634) can be affixed to any table
or counter edge and can hold any 5001, 5002, or 5003 CopperHead
® as well
as the 4000 MiniMicro and 5000 Mr. Micro™ orbital weldhead.
Extension Cable
When longer weldhead cables are needed, a weldhead extension cable
is also available in a 25’ length. The extension cable (P/N 005-0635) has
all the necessary connections needed to connect a CopperHead
® to the
CobraTig ® 150: welding leads, gas, coolant supply and return and control
interface, or to an ACL ®
using the Pig Tail Kit (P/N 005-0619).
Pig Tails
The CopperHead ®
cable ends are designed to fit directly to the CobraTig
®
150 using twist-lock type connectors. In order to connect the CopperHead ®
to the older ACL ®
Orbital Power-supplies, an adapting Pig Tail Kit (P/N
005-0619) may be required. This Pig Tail Kit mates the twist-lock type
connectors of the CopperHead
® to the push-in type connectors of the ACL ® .
The CobraCooler™ can also be utilized on the ACL ® , allowing for a complete
water-cooled orbital welding system.
Collets
A set of Collets is defined as top and bottom halves for each side of the
weldhead. Typically, 2 sets are required per each weldhead. Locating
mandrels are used to mechanicaly position the tub or weld fitting directly in
line with the tungsten electrode.
Section D Maintenance
Preventative Maintenance
Prior to performing any maintenance, the weldhead should be tested to
“benchmark” its performance. A normal calibration should be run and the
required correction noted. If the weldhead is running slowly, this usually
indicates that there is an excessive load on the drive motor, and that
maintenance is required.
Rotor Accuracy
Weld uniformity depends on the accuracy of the position of the rotor during
welding. Rotor motion should be circular in motion in a plane at right angles
to the tube and concentric with the center of the tube to be welded. Any
deviation from the proper tracking or discontinuity in the rotor will appear in
the weld.
Problems in the plane of rotation are usually associated with Collets and can
be corrected by Collet modification. Discontinuities with rotor motion are
more serious and may require replacement of the rotor, the Teflon race, or
both. Proper replacement requires factory tooling and is not a field repair.
Cable Assembly
An electrical measurement should be made to determine continuity from
the positive cable connector to the rotor and from the negative cable to the
spring loaded connector block on the weldhead.
Resistance measurements should be less than 0.1 ohms.
A measurement should also be made to verify that no conductivity exists
between the positive and negative power cables. Any measurable
conductivity through the weldhead will severely reduce arc start reliability.
The resistance measurement must be greater than 20 M
Ω.
A visual inspection should be made to determine the condition of the
weldhead, the cable assembly and the cartridge. If there are damaged or
worn items, they should be replaced or returned for factory service.