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They not drive belt, they serve as protection to rails against chips/mist etc. Many of us use concertina folded covers.
Zeeflyboy has brought design to different level - read higher:)

Even bearing with red seal - so nice
every colour with black will looks good - keep to colours

This doesn't look like home made machine.
I am speechless, attention to details and general looks blowing my mind - hats off

Hi
In general this is easy to build design but I would change it slightly:

1. Put rails on spindle plate and blocks on Z plate (this will give zero torque at top spindle position, your design...

I do keep well oiled - rust protection+ anti splatter spray while MIG welding. TiG is clean so no needs for anything

Should add that the mix goes through bed/slipper which is kind of mold and is compacted by packshaft with fingers - layer of concrete is 12mm thick and travel 1m/s speed.
In your case vibrating...

Black oxide kit used to blacken the steel parts - mostly mild or bright steel

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Now everything strip down for painting

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I use body filler to cover imperfection
Already...

Thanks Jazz, SolidWorks helps a lot, I print the template before I drill any hole and cat any shape, use automatic puncher to be precise. Can not wait to the end.

Planing base for ballscrew - base is 60x5 mild still (as we know is far from flat, unlike cold rolled - bright steel)
As always got some distortion after welding.

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