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 10+15mm washers and 1mm clearance should be 24 + 10 + 2 = 36mm diameter.

X Blocks

• The X major and minor blocks should have the same heights.

• Base to shaft hole = 30mm

• Base to stepper hole = 75mm

• Base to top = 100mm

Y Blocks

• The Y major and minor blocks should have the same heights.

• Base to X shaft hole = 25mm

• Base to Y lower shaft hole = 50mm

• Base to X stepper hole = 70mm

• Base to Y stepper hole = 95mm

• Base to Y upper shaft hole = 140mm

• Base to top = 150mm

Z Blocks

• The Z mount block should coincide with the Y shaft positions.

• Base to lower shaft hole = 25mm

• Base to stepper hole = 70mm

• Base to upper shaft hole = 115mm

• Base to top = 140mm