Re: Show how to build a CNC machine from the very beginning to the end
Originally Posted by
handlewanker
Wow....all that calculation......I considered wiring in a 100 Watt light bulb in series with the live wire to slow the inrush down, and when the voltage built up to 240 just short it out with a 240 volt relay......the relay NC contacts would remain closed while the voltage was low and rising, but would activate when the trannie was "full" and the voltage was at 240.....I think.
Ian.
Not sure what circuit you are talking about here where you want to limit in-rush current, but a 100W light bulb won't work so well. Can't carry enough current for any significant load, wrong resistance, and short-lifespan. The ICL that xjdubber linked are in the 1-10 ohm range, a 100W lightbulb resistance is about 20 ohms when cold, 600 ohms when hot.
Tim
Tormach 1100-3, Grizzly G0709 lathe, Clausing 8520 mill, SolidWorks, HSMWorks.