Metallisation ARC150-2310D, Руководство по эксплуатации

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Page 40 of 48
4.9 Wire Condition
The importance of supplying good quality wire to the arc spraying pistol cannot be over
emphasised. Over many years, two simple principles have proven to be true:
1. If good quality coatings are required, attention should be given to the state of the
Nozzle and the quality of the air supply.
2. For trouble free spraying, attention must be given to the condition of the wire
dispensing system.
Due to the often dusty metal spraying environment and the large quantities of wire which
modern pistols consume, the second principle requires awareness on the part of the sprayer,
the store-keeper and the buyer to ensure uninterrupted spraying.
Ensure that:
a) Wire is not contaminated or damaged and is of proven quality.
b) Wire pulls easily from the conduits (wire should be able to be pulled through
the conduits without excessive force).
c) Lubrication of the conduits is not excessive.
It is important to give good Current Transfer from the contact tubes to the wire. In order to do
this the wire surface must be clean and able to touch the copper Contact Tubes. The contact
area is drastically reduced if dust or other contaminants are allowed to enter the contact area
and build up. This is known as
Surface Debris .
All wires have Surface Debris in the form of drawing lubricant and dust particles, but this
becomes a problem when the wire has been stored in an open state for a long period of time.
If this is allowed to enter the system it can become compacted and cause the wire to seize.
The most common solution when debris is a problem is to wet a lint free pad with
approximately 5ml of Metallisation Wire Oil and fold it over the wire where it enters the wire
conduit. The pad may be held in place with a small spring clip and the pad removed and
folded in a different place every hour or so depending on the amount of debris collected.
Surface Debris can also increase
Conduit Friction which can produce a condition where the
wire cannot be pulled through the conduit. Conduit friction is easily reduced to acceptable
levels by an occasional light application of Metallisation Wire Oil upstream of the drive unit.
Avoid over-oiling since this tends to wet the spray head and causes dust to collect around the
Spray Head and Terminals. Excessive lubrication can also result in oil being carried onto the
surface of the coating applied. Apply when changing reels of wire or after prolonged periods of
down time e.g. the beginning of a new day or shift.
To summarise, for optimum Wire Feed and Current Transfer follow the below points:
a) Ensure the wire used is the correct size and is undamaged.
b) Store the wire where it will not be contaminated by dust and the surface will not
oxidise or corrode.
c) Remove Surface Debris by applying a very lightly lubricated pad to the wire before it
enters the conduits. DO NOT over lubricate. Change the pad regularly.
d) Maintain a gentle, even curvature of the wire conduits.