Quite an Unusual one

[Boyan Silyavski]

Thanks guys!

Don't get the point of 2 ballscrews on Z axis Boyan but it sure looks Cool.!. . . Mega OTT but very Cool.

Thanks Dean,

I will explain. So people don't get over excited and start doing machine with double ball screw assemblies on the Z . As i said i will not do that again.

First i wanted to use a pneumatic hammer to shape the 1mm metal sheet. So i thought better 2 ball nut assemblies than just double ball screw nut, cause so the vibration will be spread on 4 fixed ball screw supports instead of 2.

Then as we spoke it became clear that 1 ball nut assembly is ok, especially if fit with double ball nut.It also became clear that maybe i will not use at all the hammer but make separate machine.

But i saw that because of the Z rail length /i had them already/ i will loose Z travel, don't remember exactly but instead of 200 it was to be 160. Or i had to change this and that and move the upper bearing blocks on the Z plate too much down, which would make pointless the so strong Z box


And as all was designed for 200mm travel i decided to live with the 2 ball screws

So yeah, it was a mistake , not a design wonder, just cost me 1 ball screw more. One year ago i had no idea how big can be 2505 screw, how angular contact bearings work, that i could have made custom end supports and so on. Slowly evolving...


There are also some other small mistakes on the gantry design that i would not repeat, most of them are OTT because of the hammer idea. Not that big mistakes but unnecessary waste of time and energy. I know now how to make all much simpler and faster. Same strong.