- About me
- A university trained Professional Mechanical Engineer, registered in the Province of Ontario, Canada.
A wire and cable manufacturing engineering specialist with over 35 years hands on experience.
- Hello Ms Ingham,
Your cable as you have stated, would be outside and exposed to the elements including lightning. It would also be mounted on a metallic roof.
I personally would be quite cautious and install the cable in a small metallic conduit with the upper end sealed to prevent moisture ingress. The lower end of the conduit would be left open to drain any moisture that inadvertently got into the conduit. Moreover, I would make sure that the metallic roof, TV antenna and conduit are all properly grounded.
Finally, I would make sure to use moisture proof connectors on the cable.
- Hello Mr. Lua,
First you need to purchase a portable, precision thermocouple type temperature monitor certified for accuracy by your government standards and traced right back to the World SI standards. It should also have a sticker on it verifying same and showing when the next calibration date is due.
Then you go around to each extruder and, while hot, check the thermocouple output of each zone and other temperature indicator such as the melt temperature. The portable temperature monitor should fully agree with each temperature monitor or controller on the extruder. Them you place a calibration sticker on each temperature controller or monitor on the extruder indicating that it has been calibrated and indicating that it must be renewed again in one year's time.
- Hello Mr Jongguran Sondang Doli Noviedo,
I have looked at your drawing but I cannot tell anything from it or about it. Is there a dancer or just a wire straightener?
I suggest you click on the "WAI STORE" on the left hand side and purchase the following books and articles:
Electrical Wire Handbook, Part 1
Electrical Wire Handbook, Part 2
We Do it Straight - Wire Straightening
Then start reading!
With regard to the second question, are you talking about capstans in a drawing machine? If so, you should be aware that a standard drawing machine is a non-positive device and thus more conductor is introduced to each drawing die than is necessary. This prevents wire breaks. The excess material slips back through the machine and the number of wraps is such to allow both the slip and the supply of conductor for the next drawing die. It is empirically determined.