The Bucking Magnet Motor

[nievesoliveras]

Thank you @thaelin. Thank you @zmonkey.

[z.monkey]

Full Scale UABMM-Large.jpg is here...
http://www.overunity.com/index.php?action=downloads;sa=view;down=450

[Arthurs]

The result? Look forward to! ! !

[z.monkey]

Pardon the delay, I have been having machine troubles...

My milling table suffered a breakdown.  Its a cross slide table, so there is hardware that moves the table.  The table screws have a keeper point which is on the moving table part, and a reference mounting point which is fixed to the base.  The reference mounting point is basically a nut.  The keeper is a rotating joint which determines the alignment of the table along the axis of the positioning screw.  The original hardware that was this keeper, rotating joint was eroding very quickly.  This resulted in a very large amount of lash on the positioning screws.  The more I used the tool, the greater the lash became, making it more difficult to use the tool, and would ultimately cause mechanical failure...

So, whats to do?  Buy a new, better quality table?  $300?  Nah...  Buy another same quality table and use it until it fails, then toss it?  Nah...  Its a cool table, I like it.  We should use scrapyard ingenuity to make it betters...

I had to let this fester in my brain to figure out the right materials.  I ultimately used some scrap iron hanging around in the shop.  I didn't have enough room inside the existing table to add the shaft collars, so I had to extend the keepers outside of the tables.  The iron scraps that I found had some existing holes that could be utilized.  I cut the pieces into appropriate lengths, and added more holes as needed.  Then bolted everything together with 3/8 inch machine screws.  The shaft collars mount on the screw shaft on both sides of the new keepers.  This improved the linear lash considerably.  I am also going to add thrust bearings on both sides of the new keepers.  I want to keep everything happy around the new keepers...

[z.monkey]

I  got a snow day, so I am starting to mill the UABMM plate.

I am using 2x4 for a sacrificial block.  The center of the plate is bolted to the 2x4 block.  Then the 2x4 block clamps into the cross slide vise.  I align each cant (magnet cutout) with the table edge, and then use the cross slides on the table to work down the cant.  After the cant is cut out I rotate the plate to the next cant position, and do it again.  This is going a lot faster than I expected.  I am cutting everything about 30 to 50 mils wide so I can finish them very precisely with a file.  I want to keep the clearances tight in the cants...