the drums for my Antweight Saifu and Beetleweight Weta kits,
and they came back with a very reasonable quote for a quantity
of 10 parts.
These drums differ from their larger cousins in that they
are made from 6061 aluminum rather than the stronger but
more expensive 7075. The 6061 should be tough enough
for a Fairyweight and has the advantage that it’s more easily
The results can be seen in Figure 2, with the larger drums
for scale. The gold anodizing adds a bit of “bling.”
The top and bottom panels are intended to be 0.040”
polycarbonate. Rather than get these individually water cut, I
instead had a template for them to be water cut from 1/8” steel.
This worked quite well (Figure 3) but the parts are not as rigid as
So — if weight allows — I’ll try to make some parts in 0.030”
7075 aluminum as used with success in Saifu.
Similarly, I had a template made (Figure 4) for the UHMW
armor. That will allow accurate parts to be quickly made from
cheap standard width strips from McMaster.
The drive motor mounts were 3D-printed by Shapeways in a
SERVO 09/10.2018 27
Figure 2. Drums.
Figure 3. Cover template and
Figure 4. Armor
UHMW strip. Figure 5. Motor mounts