4. Bottom Arm Assembly

FBX Robot Curriculum, Module No. 1

For this step, you will need the following parts:

Insert the DC Motor (FBX-4) through the large hole in the Middle Column (FBX-3). Then, align the holes on the motor to the holes on the middle column and secure it using six M3x12mm Allen Screws (FBX-24).

For this step, you will need the following parts:

Insert the DC Motor shaft (motor from the previous step) through the flat side of the Small Yellow Gear (FBX-5). Make sure to align the small hole in the gear with the hole in the motor shaft. Then, secure the yellow gear onto the motor shaft using an M4x12mm Allen Screw (FBX-27) as shown here:

Now, let's connect the arm assembly to the chassis. To do this, align the bottom of the arm assembly with the holes on the chassis (circled in red), and secure it with two M3 x 12mm Allen Screws (FBX-24) as shown here:

For this step, you will need one additional part:

Install the Left Side Column (FBX-2 L) onto the chassis assembly loosely, using two M3x12mm Allen Screws (FBX-24) as shown here:

For this step, you will need the following parts:

Take the two M3x30 mm Allen Screws (FBX-22) and thread them through the two 3mm holes on the Left side of the Big Yellow Gear (FBX-6). When you thread them on, you should leave about 5 threads exposed to give us some wiggle room in later steps.

The Left side of the gear is the side with the protruding center piece.

For the next few instructions, please reference the following diagram:

Slide the two Gear Spacers (FBX-9) onto the two M3x30 screws from the previous step, on the Right side of the gear.

Next, insert the Arm Center Shaft (FBX-7) through the Big Yellow Gear, and slide the Spacer (FBX-19) onto the Arm Center Shaft on the Right side of the gear.

Now, take the Black Arm C-Channel (FBX-8) and slide it onto the Arm Center Shaft (flat side down), followed by another Spacer (FBX-20) on the end of the shaft.

Finally, use M3 Nuts (FBX-23) to fasten the M3x30mm Allen Screws (from the above steps) to the Arm C-Channel (FBX-8) using the two holes as shown in the diagram above.