Strider Camera Robot V2

This is a simplified version of Strider Camera Robot.

This design avoid to use thin wall bearing and use paperclip as rod, so it can reduce the difficultly of get the material, reduce the cost to build and also reduce the weight.

This instructables mainly cover how to assembly the new version of 3D printed model. More other details can be find at Strider Camera Robot.

Supplies

Two 4.3g servo:

https://www.aliexpress.com/wholesale?SearchText=4.3g+servo

Some Paperclip:

https://www.aliexpress.com/wholesale?SearchText=33mm+paper+clip

100 pieces of M1.4x4mm pan head bolt:

https://www.aliexpress.com/SearchText=M1.4+pan+head+bolt

Step 1: 3D Printed Parts

Download and 3D print all the parts at thingiverse:

https://www.thingiverse.com/thing:4977235

Note:

The file name tail with "_x2" means print 2 copies ... "_x12" means print 12 copies.

Step 2: Servo Patch

We need to patch two 4.3g servos into gear motors and reduce the size foot print:

• picture 1: unscrew the servo
• picture 2: remove the stickers and bottom cover
• picture 3: detach the potentiometer from the main axis
• picture 4: optional, if the servo is not 360 rotation model, desoldering motor from control board
• picture 5: use marker mark the cut out area
• picture 6: trim the bottom cover
• picture 7-8: screw up the trimmed bottom cover
• picture 9-10: trim the main body
• picture 11-12: trim the main axis tail

Step 3: Install Motor Mount

Use 2 servo screws install to the servo mount. Remember the main axis should be in the middle.

Step 4: Build Paperclip Crankshaft

This is the most difficult parts in this intructables:

• Picture 1-2: install the smallest servo arm to the main axis
• Picture 3: unscrew to make a gap that can fit a paperclip
• Picture 4-5: unbent the paperclip to straight line
• Picture 6: bend a 1 mm right angle on the straighten paperclip
• Picture 7-10: fix paperclip to the servo arm and screw up
• Picture 11-12: mark the paperclip from axis at 6.5 mm, 14 mm, 20.5 mm, 27 mm, 34.5 mm, 41 mm, 47.5 mm, 55 mm, 61.5 mm
• Picture 13: unscrew the paperclip
• Picture 14-16: use a wire bending plier bend the wire on all marked point
• Picture 17: roughly adjust the bent paperclip look like a crankshaft
• Picture 18: cut the tail at around 2 mm
• Picture 19: screw up the crankshaft to the servo
• Picture 20: double check the crankshaft fixed on the servo

Step 5: Fine Tune Crankshaft

Use plier fine tune the crankshaft. The tuning steps are a little bit arbitrary, few points can be highlighted:

• 3 arms are divided the circle evenly, i.e. 120 degree from arm to arm
• align main axis and 3 arm poles in the same line
• double check the tuning by motor turning

Step 6: Legs Assembly Part1

Picture 1-2: connect leg3 and leg4 with screw

Picture 3-4: connect leg2 and leg4 with screw

Picture 5: repeat above step to create 6 legs (12 for both sides)

Step 7: Install Legs to Crankshaft

Step 8: Legs Assembly Part2

Picture 1: connect leg2, leg3 and leg1 with screw

Picture 2: use same method connect other 5 legs

Picture 3: cut 2 pieces straighten paperclip at around 4.75 mm (4 pieces for 2 sides)

Picture 4: stream the paperclip axis to 3 leg1

Picture 5: use same method stream other 3 leg1 and align the paperclip to body1 hole

Picture 6: align body2 holes to crankshaft and 2 paperclip axis

Picture 7: screw up body2 and cover

Step 9: Check Leg Assembly

Check the leg assembly by a slow motor turning.

Step 10: Enjoy!

The legs assembly parts is finished. You can refer Strider Camera Robot for the circuit and software part.

Note: the bottom part of this version can fit a 702535 Lipo, or you can adjust the parts to fit a bigger Lipo.