Proxxon MF70 CNC kit

Proxxon MF70 CNC kit

The Proxxon MF70 milling aluminum: https://www.youtube.com/watch?v=0W1iQ1PUNVY

Following improvements/changes have been made compared to the design of ttsalo:

• full x-axis table range is now available. Using the ttsalo design I lost 5 mm of the x-axis range; perhaps this issue was caused by changes Proxxon did make to the design of the MF70.
• No bearings need to be removed/replaced; the x/y/z axis is simply driven by a coupler connecting the stepper directly to the handwheel. The coupler is slightly flexible since it is made out of NinjaTek.
• holes for end switches have been added for all axis

Required 3D printed parts:

• BracketX.stl (1x)
• BracketY.stl (1x)
• BracketZ.stl (1x)
• CouplerXY.stl (2x)
• CouplerZ.stl (1x)

Optional 3D printed parts:

• ShockAbsorber.stl (3x)
• DirtCapBracketX (1x)
• DirtCapBracketY (1x)

Required other parts:

• Nema17 (3x)
• hex screw m3x16 (15x)
• grubscrew m3 (6x)
• nut m3 (6x)
• hex screw m3x25 (4x) or diameter 3 mm screws that 8 mm longer than the originals (4x)
• hex screw m3x30 (4x)
• washer m3 (4x)

Optional other parts:

• endswitch for x-axis and y-axis (2x)
• screw m2.5x20 (4x)
• nut m2.5 (4x)
• endswitch for z-axis (1x)
• screw diameter 2.5 mm, length 15 mm (2x)

Suggested Materials:

• ABS (95% infill): BracketX, BracketY, BracketZ
• NinjaTek Cheetah (50% infill): CouplerXY, CouplerZ, DirtCapBracketX, DirtCapBracketY
• NinjaFlex (20% infill, not important): ShockAbsorber
• no supports are required

Assembly instructions x and y-axis:

• attach steppermotor to bracketX(Y) and shockabsorber using hex screw m3x16 (4x)
• assemble couplerXY using 2 grubscrews and 2 m3 nuts
• attach couplerXY to handwheel using hex screw m3x16 (of course the handle from the handwheel needs to be removed first).
• attach bracketX(Y) to x/y table using hex screw m3x25 (2x), (or use the longer screws with diameter 3 mm if they could be resourced)

Assembly instructions z-axis:

• attach steppermotor to bracketZ and shockabsorber using hex screw m3x16 (4x)
• assemble couplerZ using 2 grubscrews and 2 m3 nuts
• attach couplerZ to handwheel using hex screw m3x16 (of course the handle from the handwheel needs to be removed first).
• attach bracketZ to z-column using hex screw m3x30 (4x)

remark:

• I did tap M3 thread in the table for the X/Y axis since I could not source screws with the same pitch that were originally holding the caps. This is not required if screws can be sourced that are about 8 mm longer than the original ones.

Changes 21 May 2020:

• added optional dirt caps for BracketX and BracketY.

Changes 01 Jan 2021:

• added optional gauge holder "GaugeHolder.stl"

Category: Machine Tools