CNCCMV2/CAD

Block Uniformity

• Keep 2 block dimensions same for all blocks

• Based on the conceptual design, 1 of the block dimensions will solely be used to fit the diameter of the leadscrews, precision shafts, and sleeve bearings.

• The other block dimension to be uniform will mostly support the part by its length on precision shafts.

• For accommodating leadscrew nuts up to 10mm or 3/8" dia, dimension 1 will be 40mm (approx. 1.5")

• For accommodating stepper motor mounting and axis stability, dimension 2 will be 75mm (approx. 3")

Stepper Motor Mount Uniformity

• Use the same stepper motor type for each axis.

• Nema 17 steppers for appropriate performance characteristics.

• Standard 31mm center-to-center mounting holes. Modular.

Sleeve Bearing Mount Uniformity

• Use the same sleeve bearing type throughout machine

• 2 fastening holes on the part to which sleeve bearing should be mounted. For sleeve bearing of 24mm diameter, mount circle with M5 screws and 1mm clearance should be 24 + 5 + 2 = 31mm diameter.

• 20mm depth mount holes

Leadscrew Nut Mount Uniformity

• Use the same leadscrew nut throughout machine

• 3 fastening holes on the part for the nut mounting. For current leadscrew nut, insertion diameter = 12.7mm, mount circle diameter = 19.05mm.

• 20mm depth mount holes

Assembly

• 

Structure

Structure CAD and 2D Fabrication Drawings

Bearings: Sleeve Bearing

• File:SleeveBearingV2.pdf

• File:SleeveBearingV2.stp

Drive: Leadscrew

• 320mm Lg, Qty 3

• 120mm Lg, Qty 1

Drive: Stepper Motor

• File:42BYGH404.pdf

Drive: Spindle Motor

• BLDC Outrunner

Shafts: XY Shaft

• File:XYShaftV2.pdf

• File:XYShaftV2.stp

Shafts: Z Shaft

• File:ZShaftV2.pdf

• File:ZShaftV2.stp

Shafts: Spindle Shaft

• File:SpindleShaft.pdf

• File:SpindleShaft.stp

Collars: Shaft Collar

• 25mm OD, 12mm ID, 10mm Lg, M6 Setscrew

Couplings: Axis Coupling

• 15mm OD, 30mm Lg, M6 Setscrew x2

• End 1: 5mm dia, 15mm Lg

• End 2: 1/4" dia, 15mm Lg

Couplings: Spindle Motor Coupling

• 15mm OD, 30mm Lg, M6 Setscrew x2

• End 1: 1/8" dia, 15mm Lg

• End 2: 5mm dia, 15mm Lg

Couplings: Spindle Bit Coupling

• 15mm OD, 30mm Lg, M6 Setscrew x2

• End 1: 5mm dia, 15mm Lg

• End 2: 3mm dia, 15mm Lg

Fasteners: Hardware Screw

• 20mm Lg, M5x0.8

Fasteners: Platemount Screw

• 30mm Lg, M5x0.8

Fasteners: Spindleblock Screw

• 60mm Lg, M5x0.8

Fasteners: M5 Washer

• 5.3mm ID, 10mm OD, 0.9-1.1mm Thk