Hi! I am working on a project where I am utilising the FluxGrip magnets to create pulling force to a ferromagnetic surface (black steel). When activating the magnetization command the magnets will magnetize for a short period of time before demagnetizing by itself. I believe this has something to do with the ferromagnetic surface, because when magnetizing with a small air gap between the magnet and the surface it works perfectly fine. What can be the cause of this, and is this behaviour known? In addition to this I experience a brutal decrease in magnetic pulling force, just by having an air gap of 1-2mm. Does anyone have any experience with this?
Hi!
The magnetic field of FluxGrip is optimized for applications like payload attachment in drones and robotics, this means that even a small air gap will significantly decrease the resulting force.
This section from fluxgrip.zubax.com is relevant here:
In order to achieve maximum pulling force at a larger distance a different pole arrangement is required, we can develop this. Please reach out to sales@zubax.com if you’re interested to discuss this further.
When activating the magnetization command the magnets will magnetize for a short period of time before demagnetizing by itself. I believe this has something to do with the ferromagnetic surface, because when magnetizing with a small air gap between the magnet and the surface it works perfectly fine.
This is very strange. The ferromagnetic surface shouldn’t affect the magnetization state, are you sure the magnet completed its magnetization cycle? (I’m assuming the surface isn’t magnetized.)
Looking at the photo I don’t see a power source, therefore I suspect this might be a power issue. The Arduino won’t be able to supply enough power for the FluxGrip to magnetize (and there’s a high likelihood that you will damage the power circuitry on the Arduino if you do this).
If you haven’t, please check the RCPWM section in the Quickstart guide, I think this might help you with your setup.
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