2+2+3 More Plasma builds, double the joy ! 3X2M and 2.5X1.5M cnc plasma build.

regarding HiWin, i forgot to mention that all my machines are fully bolt on, so they can be adjusted, and that makes them not a good choice for me.
Otherwise, if the frame is rigid, HiWin can be used, of course.
I have used and still use HiWin and THK and NSK linear railrs, they are an abomination when you look at how much dynamic load they can handle, supported round ones can handle less than 1/10 of that, i have new THK 35mm ones with long carriages that can do 17900KG of dynamic load!
As for dust, i had the worst case where the rails were up and full of dust and water and they are still good, but also had a single case where one HiWin HGR25/HGH25 locked after a week of use.
There is also a huge difference in tolerances, linear ones will lock even from plasma fine dust if it gets in, round ones will continue working like nothing happened.

I saw your drawing on the other topic, that will do just fine, for many, many years.
Do not use extra wipers and scrapers, except the standard ones that come with the HGH carriages, they add a lot of friction.
Also a single HGR15 is more than enough for the X axis/gantry if you make the Z axis lite enough. Two for the Y axis, HGR15 also more than enough.
Make the moving parts as lite as possible, notice on my machine everything on the gantry and Z axis is aluminium, except the rails.

Just a short update, all 3 machines from the latest batch are finished, configured, tested and fire tested.
The only things still missing are the side panels and cable chains, still printing those
For a longer update, head over here:
forum.linuxcnc.org/show-your-stuff/32784...t-15?start=30#253992

Some of them do blank, some do not, this one does that because of the cable, it is the best i could fund here but still not good.
The plasma source is a high voltage/ high frequency pilot arc one, so makes huge amounts of interference.
I have a video where this plasma blanks a monitor on the other shop at every start using that same type of cable. That is 7 meters far and through metal clading!