Wire Wound
2008
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 Post Glover ILC 606 DBENIA2 Wire Wound Resistor PR5 FB $100.00 Time Remaining: 23d 23h 8m Buy It Now for only: $100.00 |
 MIDORI PRECISION CP 4M WIRE WOUND POTENTIOMETER NIB $64.00 Time Remaining: 4d 20h 36m Buy It Now for only: $64.00 |
Wire Wound
Skills Training Required to Work With Aluminium Wire
Copyright (c) 2010 Nadine Davis
As techniques for manufacturing products made from aluminium become increasingly sophisticated, more industrial and consumer applications for this amazing metal are being found. Aluminium can now be found in almost every home, business and manufacturing complex in the industrialised world ' from a drink can to the family vehicle, it is hard to imagine life without it. Lightweight and corrosion-resistant, aluminium is especially suitable for use near the ocean, and many ocean front buildings are now replacing their old, corroded and dangerous balcony railings with aluminium railings which will resist ocean spray. Some specialised knowledge is needed, however, to get the best out of this amazing resource.
Aluminium can be a difficult metal to work with, especially for those experienced only in steel welding, and care must be taken to get the best result. Aluminium Fabrication welders are aware that what works for steel may not work for aluminium. There are three areas in particular that need to be addressed:
1. The set-up and associated techniques.
2. Power sources.
3. Three ways to feed the aluminium wire.
Because of the sheer size of this particular topic, we will discuss set-up within this article, and subsequent areas will be covered in future articles.
The Set-up and associated techniques.
The following changes to steel settings and equipment are required:
=> Liner and Wire Guides: a helically wound steel liner is not suitable as it would scratch the soft aluminium wire creating shavings. Use a Teflon or nylon liner and wire guides to reduce friction and eliminate shavings.
=> Drive Rolls: Use a U-shaped groove in the drive rolls to eliminate sharp edges that will shave off the aluminium wire. Reduce the tension on the drive roll to stop the wire from crushing during feeding.
=> Contact Tips: A bigger hole is needed for aluminium than for steel, as the aluminium expands further than steel when heated. Purchase contact tips designed especially for aluminium to prevent poor electrical contact.
=> Brake Tension: Set the brake tension on the wire spindle more loosely than for steel to reduce the force needed to pull the wire off the spool.
=> Gun Cables: Keep the gun as straight as possible to minimize tangling. The column strength of aluminium makes it much more difficult to feed.
The softness of the metal is the most difficult thing that people new to welding aluminium must consider. There is always the possibility of scratching of the soft wire and the creation of shavings which cause other problems to surface, so individual welders who are used to fabrication work must make recommendations for changes in the initial setup stages.
About the Author
There is increasing demand for
Aluminium Fabrication Brisbane
workshops like PPW Steel to produce high quality aluminium in preference to steel. This does not mean that steel will be replaced though. There is also demand for
Pipe Fabrication Brisbane
skills, depending on the type of work being performed.
resolution for a wire wound pot?
I am looking for the equation to find the resolution of a wire wound pot. the important numbers are: the workpiece moves over a distance of 12 cm. the pot is wound on 3 cm diameter form 5cm long and the distance between the wires in the pot is .25mm. What is the resoution in work piece motion.
Without either knowing what you mean by a workpiece in this context or understanding what its motion over 12 cm signifies when the pot is only 5 cm long, I'm in some difficulty answering.
However the resolution of the pot itself is 0.025/5 = 1 in 200 or 0.5% of full scale deflection.
Wire Wound Machine part1
