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Kemppi A7 TIG Orbital System 150 Manual

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A7 TIG Orbital System 150© Kemppi Oy 2016 1615
OPERATING MANUAL
2.3 Suitable collets to the collet frame
The collets are designed to clamp rmly on the outside
diameter (OD) of the tube or ttings to be welded. The
interior diameter (ID) of standard collets is oversize relative
to the tube to be welded by .075 mm to allow for standard
dimensional tolerances. The collet halves that make a pair
are identical. They are engraved to show the tube OD or
tube tting OD and type.
1. Install the two (2) pairs of appropriate collets on
either side of the weld head collet frame using
button head screws. The collet inserts are not
threaded to eliminate stripped threads in the collet
frame, which is more expensive to repair or replace.
2. Accomplish rm clamping by slight over-closure
of the collet frame. Compliance and preload are
provided by the collet frame adjustable latch
mechanism.
The latch lever provides very high clamping loads
with minimal eort. After adjusting the thumbscrew on
the latch mechanism, the toggle action of the lever should
require no more than light pressure of one nger to close.
Over-tightening can result in damage to the collet frame or
tubing.
2.4 Mounting the weld head
Do the following:
1. Install suitable collets on the weld head.
2. Install suitable electrode in the holder.
3. Mount the weld head on the tube and align the
tungsten electrode with the welding joint.
4. Close one side of the weld head and lock it
against the tube with the latch.
5. Place the other tube very tightly against the rst
tube already clamped.
6. Close the other side of the weld head and lock
with the latch.
7. Look through the hole on top of the weld head to
ensure that the alignment is right.
8. Close the hole cover.
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