So i see that people build these out of old microwave oven transformers but i dont really like those designs.
I am more interested in a magnetic table that has amore even distrivution of magnetic field.
Do you think its possible to get reasonable performance using mild steel as a magnetic flux path?
I thought about cutting a bunch of 1/4 inch steel plate and making a tray/box out of mild steel, then placing the little blocks i cut like buildings in a city or projects, making a even grid, then filling the space between them with magnet wire.
I would prefer to run at low voltage incase i accidentally drill into it (especially if drilling into something with the base angled.
My drill press is one horse power.
I never really messed with electromagnets before.. So i guess the questions are:
1) ratio of magnetic flux carrier and wire (by volume) in the magnetic base
2)gauge of wire to use
3) power source to use (thinking low drop diodes andcap bank)
4)interlock for safety - i had a few ideas here but i think the enclosure should be grounded and a circuit should be used to measure dc going through ground to disable a contactor for to disable the drill press. Also a thermal interlock on the magnet and standard precautions for the powrr supply. All interlocks would kill the drill press
5) can a thin aluminum sheet be placed on the top (1/8) of an inch to act as a removable millable durface so repairs can be conducted. I dont like the epoxy fill used on youtube. I dont feel plastic is a good durface for a drill press because it will get fucked up in short order due to machining fluids, grinding dust, etc
This is really brain storming i dont have a good idea in mind yet or any idea yo how much power you need to pull this off.
I would like this to be strong enough to work with a 3/4 inch bit, annular cutter or fairly large hole saw.
I would like it to be designed so that you can have up to 3/8 inch of free space between the electromagnets and the object being drilled, so that a 1/8 inch aluminum cover and a 1/4 inch piece of plywood can be used as a backet for using annular cutters and circular saws
Are these design goals realistic?