Currently I'm thinking that this going to be the best coil design for the individual cells. Each cell is 1.25" wide and about an inch tall. I'll be milling one of these out of some old scrap cast iron at some point, then seeing how the individual cell pulls until I have it tweaked how I need it...
Berkeman, I appreciate the dangers of high voltages and your concern. I have no intention of pushing my chuck beyond the 12v 1.5A limit if I can avoid it. I'll be doing all the initial setup and testing with a regulated power supply and then building or purchasing one to match the...
Ahhhh, that is more what I was needed to start my thinking. Thanks.
With regards to the concern about the chuck losing grip in the event of power failure, I wouldn't have considered that as an issue myself, however it bears thinking about. Provided I'm still using the 12v 1.5A that I'm...
So here's where I'm having trouble, I don't know how to make this into a series of steps to get an answer of something like you need 30 windings of 24AWG wire around a 0.5" by 4" soft iron core to get a pull force of 4 inlb/per sq in of goblins pulling on your nose.
I don't know where to start...
Alright, I think you're talking about the core being a solid chunk of iron formed like this?
And the windings wrapped around the narrow sections?
That seems counter intuitive to me as I thought that the majority of the magnetic fields would be formed blowing out the smaller ends at the left and...
Aye, my main concern was trying to figure out how to do the math to determine the number of windings and the best arrangement of those electromagnets to have the best effect. The permanent magnet is an option, but the electromagnet seems like it would be easier to build. Either way the price tag...
The primary reason I'm looking at making an electromagnetic chuck over a permanent magnet one is cost and simplicity. The permanant magnet deals require the magnet block to be very perfectly aligned with the magnetic and non magnetic sections of the chuck. Provided I do it right, this shouldn't...
Q: What will it be used with?
A: This chuck is to go with my very abused $15 surface grinder. It is a surface grinder, and it likely was good at one point, but at some point in its history it met a 300lb gorilla with a drill. I've got it working solidly in what I like to think of 'good enough...
Alright the attached picture has the two physical layouts I'm considering for the chuck, however I'll admit that looking at the math involved to determine the construction of the individual magnets and a knowledge gap in how best to manipulate the construction of such a thing to have the...