RC Strider Ver 2
Linkage: To increase step-height, Strider's linkage pairs two 4-bar linkages into a combined 10-bar linkage with front and back legs, such that the rear leg lifts the front foot, and vice versa You can find more details on Strider's linkage here.
Note: These instructions cover building Strider's frame with battery box and IR receiver on board. Once the frame is built please refer to Strider's main instructions to build the legs and outer frames.
Build Difficulty: Easy. Strider's linkage is relatively simple (as mechanical walkers go), but it still requires care to build.
Strider's Characteristics:
1. 8 Legs powered by one motor
2. Walks well on smooth terrain, but not on rugged terrain.
3. Steerable? No. For tank-style steering build Strider Ver 3. The wired Strider Ver 2 can be sort of steered by tugging sideways on the extension wire like it was a leash.
Parts Used: In addition to the Technic beams, pins, gears, etc., this build uses LEGO's 8883 M-Motor, 8881 battery box, and an 8871 extension wire. The RC version also uses LEGO's Power Functions IR RX 8884 remote receiver which I controlled with a 8885 IR remote. Also, to stiffen the robot I used 3/16" OD aluminum rods for the leg's long connections to the frame rather than LEGO's plastic axles.
Strider's part list covers most of the parts needed, except for a few parts like the mounts for the battery box.
For batteries I recommend using Lithium Ion AA batteries as they are lighter, last longer, and will improve walking performance.
Strider's part list covers most of the parts needed, except for a few parts like the mounts for the battery box.
For batteries I recommend using Lithium Ion AA batteries as they are lighter, last longer, and will improve walking performance.
I purchased the plastic LEGO parts from Bricklink
I purchased the motors, controllers and battery box from Amazon
I purchased the metal support rods from my local hardware store
Frame Instructions:
Even light-weight walkers like Strider stress frames more than wheeled vehicles, so when building walkers strive to utilize triangles to make strong and light-weight frames that resist bending forces.
I purchased the motors, controllers and battery box from Amazon
I purchased the metal support rods from my local hardware store
Frame Instructions:
Even light-weight walkers like Strider stress frames more than wheeled vehicles, so when building walkers strive to utilize triangles to make strong and light-weight frames that resist bending forces.
Notice there are no pins connecting the upper corner diagonals to the top bar. These connections will eventually be made with the aluminum support tubes.
The lower and more centered the battery box is mounted, the better the walker's performance will be. (I offset the box from center slightly due to the motor's weight)
Please refer to Strider's main instructions to add the legs.