Electromagnet manipulating neodymium

[tomtomtomtom]

Hello all,

I am developing robotic workstation with holding electromagnet as gripper tool. Electromagnet has holding force 45 N, Rated input power 1.4 W, 24 VDC, diameter 18mm. It was supposed to attach game pieces (application of playing checkers with a small robot). Game pieces are small cylindrical 3d printed parts, weight about 3grams, they have 2 washers inside the piece on top of each other (there are 2 washers (2mm) and then 1mm layer of print material). The problem is that electromagnet is too weak for that piece. Im thinking about boosting pieces with neodyme or ferrite magnet instead of washers (140HV). What do you think about this? That holding electromagnet is able to hold 4.5 kg under ideal circumstances but the 1mm is decreasing the force heavily. At the best, I would like to keep the electromagnet. The 1mm layer between holding face of electromagnet and counter magnetic part should remain too.

 

[waross]

Or you could rewind your electromagnet with a heavier gauge conductor.

 

[tomtomtomtom]

Or you could rewind your electromagnet with a heavier gauge conductor.

Thanks for this idea. It's worth considering. However, I've never disassembled holding electromagnet like this. e1as holding elmg
I've found a video of manufacturing and it looks like it holds by a glue. What is a good way to disassemble that?

 

[waross]

Or increase the voltage.

 

[MagMike]

The electromagnets in your weblink are designed for maximum holding power while in direct contact with steel. Any air gap, 1 or 2 millimeters, significantly reduces their holding power.
You'd be better served with a single, cylindrical piece of steel wrapped with wire. Ideally, the diameter of the steel should be close to the diameter of the washers in the game piece. The holding power won't be huge, but it'll work better with regard to an airgap.

 

[Hitylo]

An electromagnet can be used to manipulate a neodymium magnet by creating a magnetic field that can either attract or repel the neodymium magnet, depending on the polarity of the electromagnet. The strength of the electromagnetic field can be adjusted by changing the current flow in the coil of wire, allowing for fine control over the interaction.