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AndyCart
Oh well. It's fun trying new things. Like you I've decided it' easier to just buy the magnets. Currently I'm getting them as a block of 64 from China for about £16. They are marketed as an executive toy but they are just 10mm neodymium spheres so perfect for our needs.
If I did not have $50 USD invested in the 1/2 inch ball end mill bit, I would be converting to 10mm spherical magnets. When I went to re-order last night, my source for $1.69 magnets no longer carries 1/2" and does not expect to stock more! I had to pay $2.49 each from a second source, with the third source being an insane $3.66 each. If I wind up doing a third printer, it will be on 10mm toy magnets and I will have the buy a new bit for cutting 10mm cups.
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AndyCart
Core XY kinematics has me hooked at the moment. Very promising in terms of print quality and speed.
At this point, I just want to get a stable Delta printer working! I thought that I would be half way through printing the airfoil mold "bucks" that started my foray into 3D printing, and so far all that I have to show for it is a pile of printer parts and scrap plastic. I'm afraid to look at Core XY right now, because I might get sidetracked again..... :(