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Mechanics#

Hardware BOM#

labeled

iso photo

all parts

QTY Description Part Number Supplier
4 M3 x 25mm machine screw 92005A130 McMaster-Carr
6 M3 x 16mm machine screw 92005A126 McMaster-Carr
16 M3 x 10mm machine screw 92000A120 McMaster-Carr
15 M3 thin square nut 97259A101 McMaster-Carr
3 M3 threaded insert 94510A240 McMaster-Carr
4 Spring 9657K267 McMaster-Carr
2 Flanged sleeve bearing 5448T2 McMaster-Carr
1 Knob 6479K78 McMaster-Carr
1 200 x 8mm lead screw 3501-0804-0200 goBILDA
1 8mm lead screw nut 3505-0804-3216 goBILDA
1 200 x 8 mm shaft 2100-0008-0200 goBILDA
1 Linear ball bearing 1612-0815-0045 goBILDA
1 5 mm to 8 mm coupler 4002-0005-0008 goBILDA
2 Limit switch 255-5122-ND Digi-Key
2 DIN clip 277-2296-ND Digi-Key
1 Nema 17 bipolar 60Ncm 200steps 17HS24-0644S STEPPERONLINE

Laser cut parts#

2D cutting services

I've gotten good results using laser cutter / waterjet services from Big Blue Saw, SendCutSend, and OSH Cut.

Base#

The base can be cut out of aluminum or acrylic. Acrylic is a faster and cheaper option if you are using your own laser cutter. If you are outsourcing the laser cutting anyway, aluminum has the benefit of being stiffer for only a slightly higher cost.

base_tapped_holes.dxf

  • 3/16"(0.1875") aluminum
  • 2.5 mm holes ready for M3x0.5 tap

Laser cutting/water jetting may offer tapped holes as a service for an added cost. You can also tap the holes yourself using an M3x0.5 tap.

base_threaded_inserts.dxf

Clamps#

clamp_plunger.dxf and clamp_barrel.dxf (units are in mm)

  • 1/4" acrylic

3D printed parts#

These components are printed in Nylon PA 12 using an HP Multi-Jet-Fusion printer.

Cradle#

cradle.step

Carriage#

carriage.step

End Support#

end_support.step

Assembly#

Video#

Tools#

  • Phillips head screwdriver
  • M2.5 mm allen key
  • 5/64 allen key

Instructions#

1. Assemble cradle#

  • (2) M3x25mm screws
  • (2) springs
  • (2) square nuts
  • (1) flanged sleeve bearing
  • (1) laser cut acrylic clamp
  • (1) 3d printed nylon cradle

2. Mount motor to cradle and attach coupler#

  • (4) M3x10mm screws
  • (1) 5mm to 8mm coupler
  • (1) motor with limit switches
  • (1) cradle assembly

3. Assemble carriage#

  • (6) M3x10mm screws
  • (2) M3x25mm screws
  • (2) springs
  • (8) square nuts
  • (1) lead nut
  • (1) linear bearing
  • (1) laser cut acrylic clamp
  • (1) 3d printed nylon carriage

4. Connect carriage to motor#

  • (1) lead screw
  • (1) motor/cradle assembly
  • (1) carriage assembly

5. Attach baseplate#

6. Attach end support#

  • (1) flanged sleeve bearing
  • (1) 3d printed nylon end support
  • (2) M3 x 16mm screws
  • (2) square nuts

7. Add knob and support shaft#

  • (1) M3 x 10mm screw
  • (1) square nut
  • (1) support shaft
  • (1) knob

8. Add control electronics#

Last update: October 4, 2023