Based on the increasingly popular Spot Micro design (https://www.thingiverse.com/thing:3445283), I made a branch of it, to to improve a few points:

• All nuts and bolts were replaced with self tapping screws (way easier and faster to assemble and open/close covers to access electronics)
• Thanks to the self tapping screws change, no more gluing of any part!
• The foot bigger is now bigger on the inside, and the wrist smaller (no noticeable from outside, but will have better elasticity)
• Changed the servo horn to the ones that come with the servos PDI-HV5523MG
• Made a tester for those servo horns so anyone can check if they would fit before printing a leg section

If you'd like to customize this design further, please find the Fusion 360 design here.

Hardware needed

I'll only list here what is specific for this chassis version, (So you already know you'll need a [Raspbery Pi}(https://aaf.li/44983), or other main board of your preference, etc). (Link in the list takes you to were I bought them, so you can get the same if that's what you want)

• 12 x PDI-HV5523MG servos
  • If you have other servos, please make sure they fit the design, using the ServoHornTester.stl
• M3 self tapping countersunk head screws
  • I didn't count how many you need.. Get the kit, you'll use them for other prints too :)
  • They should have countersunk head, as I made space to fit those screw heads
  • These are use to link every printed part together
• M2 x 6mm self tapping countersunk head screws
  • Make sure they are 6mm long, countersunk head and M2
  • These are used to screw the servo horns to the printed parts

Parts to print

Some parts on this design are compatible with the original SpotMicro. When this is the case, I will mention that in the list of things to print.

Note about file naming

• F = Front
• B = Back
• I = Inner
• O = Outer
• L = Left
• R = Right

Servo Horn Tester

To avoid spending countless hours printing just to find out this design doesn't fit your servos, I'd recommend printing the servo tester. It prints quite fast and you ensure every other print will work with your hardware.

• 1 x ServoHornTester.stl

Body

• 1 x Chassis_Baseplate_v2.0.stl (compatible with SpotMicro v1.0)
• 2 x Chassis_Side_v2.0.stl (compatible with SpotMicro v1.0)
• 1 x F_I_Shoulder_v2.0.stl
• 1 x F_O_Shoulder_v2.0.stl
• 1 x B_I_Shoulder_v2.0.stl
• 1 x B_O_Shoulder_v2.0.stl

Legs

• 2 x L_HindLimb_v2.0.stl
• 2 x L_MidLimb_v2.0.stl
• 2 x L_Wrist_v2.0.stl
• 2 x L_MidLimbCover_v2.0.stl (compatible with SpotMicro v1.0)
• 2 x R_HindLimb_v2.0.stl
• 2 x R_MidLimb_v2.0.stl
• 2 x R_Wrist_v2.0.stl
• 2 x R_MidLimbCover_v2.0.stl
• 4 x Foot_v2.0.stl (Better if printed in TPU or any elastic material)

Covers

• 1 x Cover_Top_v2.0.stl
• 1 x Cover_Bottom_v2.0.stl
• 1 x Head_RPiCam_v2.0.stl
• 1 x Butt_Empty_v2.0.stl

NOTE: I use aaf.li to manage my links, this allows me to:
- Use shorter links
- Change them in only one place if I see they are broken
- Have a nice dashboard with statistics on their performance
- And all this for free