I am starting a new build as I wanted to upgrade my existing machine with an ATC but I can not find enough downtime to make the modifications.
Because of this I am building a second machine and will then run them both in production.
The existing machine mostly does VCarving and struggles with cuts above 1000mm/Min due to vibrations in the structure destroying the fine detail (although it can make profile cuts at 5,000mm/Min):
Attachment 310764

With a view to going much faster on the VCarving I will build the new machine much heavier and with a lot more cross bracing for rigidity:
Attachment 310768

The spec of the new machine will be:
4'x2' cutting area with 24,000mm/Min rapids and 15,000mm/Min cutting speeds.

Hardware will be:
25mm, 20mm and 15mm Hiwin Rails for X, Y and Z.
Helical Rack and Pinion for the X and Y axis.
4mm Pitch THK Ballscrew for the Z (with Pneumatic counterbalance)

Frame will be 120mmX60mm RHS 5mm wall.
Gantry will be 180mmX90mm Heavy extrusion with uprights machined from solid aluminium billets.

Electronics and drive will be the same as my current machine:
2.2Kw 24,000RPM ATC spindle (ISO20)
Leadshine EL5 400W servos (dual on the X axis)
1:5 Planetary gearboxes for the R&P drive.
CSMIO from CS-Labs for the motion controller.

I already have the ATC and all the rails and R&P plus the gantry extrusion.
I will shortly be ordering the Servos and gearboxes. I will order the steel when I am ready to start with the build.

One of the pieces of aluminium to be machined for the gantry supports:
Attachment 310770
Parts for the Z axis including the ATC spindle
Attachment 310772
ISO20 Tool holders and holder forks:
Attachment 310774
Some test welding of the 120mmX60mm RHS:
Attachment 310776