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13. Assembling the mechanical parts
The following illustrations illustrate the mechanical assembly.
Caution!
When tightening the plastic screws, make sure that they are not screwed too tightly into the plastic and that the plastic holders are not damaged!
If you remove a screw from a plastic part and then screw it in again, first turn the screw anticlockwise until you notice that the screw "engages". At this
point the screw is "engaged" in the existing thread. The screw can then be easily screwed into the thread that has already been created during the
first screwing in. If the self-tapping plastic screw is screwed in without using this method, a new thread may occur. This weakens the material and the
tensile strength as well as the hold are no longer guaranteed.
a) Mounting servos
Mount the servos as shown in the following illustrations. You will need 3 pairs of left and 3 pairs of right legs.
Most aluminium parts have a slightly rounded side due to the manufacturing process (punching process). You can use the parts in both directions during as-
sembly. The nicer side should point forward in the direction of travel. The rounded side of the top and bottom plates should point in the same direction (top or
bottom).
Required tool: 1x PH2 Cross Screwdriver
The screws are packed in plastic bags in the kit. Figure 19 shows the type of screws used for servo mounting.
A total of 6x legs must be assembled (3 left and 3 right).
Figure 20 shows a leg of the Robobug. The leg elements are called "Coxa", "Femur"
and "Tibia".
Place the servo in the plastic U-angle and the aluminium leg thereon (pay attention to
the left and right leg and the round edge).
The servo cable is pushed through the oval opening in the U-angle.
Screw the leg together with four plastic screws.
When screwing the parts together, align them so that they are centred in the U-angle,
the aluminium legs lie against the servo and ensure that nothing is strained or warped.
If necessary, loosen the screws a little to relax the mechanics and then carefully tighten
the screws crosswise.
18
Figure 19
Figure 20
Figure 21
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