Looking for 4th axis build advice

**hanermo2** · 30-10-2018

Em .. everything depends.
I think most users missed the 200 mm D endmill, = 20 cm !!!, == 8 ", and carving wood 800 mm in D. !!!

You get huge forces from the leverage arm, and rigidity is always everything.

I suspect you need 4-8x the section sizes you are using and a box section spindle holder.
For the 200 mm endmills in wood at 800 mm D on blank, indicating about 400+200 == 600 mm free length (++) on the spindle ram/holder.

**magicniner** · 30-10-2018

Originally Posted by hanermo2

Em .. everything depends.
I think most users missed the 200 mm D endmill, = 20 cm !!!,

Yeah, You added a "D" and assumed it meant Diameter, I think some users missed how useless a 200mm Diameter Ball Nose End Mill is for machining anything but flat surfaces and cylinders and didn't look at the pictures? :D

**marbles** · 30-10-2018

The big D for me at the moment is working out what software to go with for 4th axis. Aspire is fine but is limited use for 3d models with voids etc. Rhino inc Rhinocam, Fusion 360 or Deskproto currently comparing all three... blimey

**marbles** · 30-10-2018

Originally Posted by hanermo2

Em .. everything depends.
I think most users missed the 200 mm D endmill, = 20 cm !!!, == 8 ", and carving wood 800 mm in D. !!!

You get huge forces from the leverage arm, and rigidity is always everything.

I suspect you need 4-8x the section sizes you are using and a box section spindle holder.
For the 200 mm endmills in wood at 800 mm D on blank, indicating about 400+200 == 600 mm free length (++) on the spindle ram/holder.

;D
Thats a 12mm Diameter, 200mm long from RicoCNC.com
https://www.ricocnc.com/products/248...-Flat-End.html

No way am I going to carve 400mm deep in wood, foam blocks only! Either way as your saying the frame size needs to be made out of some serious section.