Build very rigid CNC machine with zero backlash and high accuracy at home
Here are some info on build.
Build time: About 500 hours.
Build cost: About $4500
Travels:
Z : 11″ ( 27.9 cm )
X: 22″ (55.88 cm)
Y: 12″ (30.48cm)
Spindle:
5.5 KW ATC BT30 18000RPM from Ebay. ( very happy with it) seller is super nice guy.
https://www.ebay.ca/itm/Combo-ATC-tool-change-spindle-motor-BT30-5-5kw-18k-rpm-VFD-NBT30/184223154689?hash=item2ae48e4201:g:XTQAAOSwPdhdOt~h
Electronics:
BOB: PMDX 424. https://www.pmdx.com/PMDX-424
Spindle speed control: PMDX 407. https://www.pmdx.com/PMDX-407
Stepper motors : Nema 34 1275oz-in
Drivers: DM860d from Ebay
Software:
Mach4.
Rails:
20 mm Raills for X,Y and Z
Ball screws:
Y ball screw is 20mm
X Z ball screws are 16mm
Couplings:
Bellows style Ruland coupling with zero backlash .
https://www.ruland.com/servo-couplings/bellows-couplings.html.
Frame:
Y Axis
24″ x 14″ X 4″( 64 X 35.5 X 10.1 cm )
Material 1.25″ X 4″ ( 3.1 X 10.1cm )steel
X Axis
35″ X 11″ ( 88 X 28 cm )
Material .500″ (12.7mm) base plate
1.25″ X 3″ walls
Z column
35″ x 8″ X 4″ ( 88.9 X20.3 X 10.1 cm) tube with .500″ (12.7mm) wall thikness
filled with cement.
Enclosure:
Aluminum sheet and angle.
source
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