Robot-making process [9-1] hand

[Robot Making 9-1]



Making the hands - the fingers in particular - is probably the most difficult work in building a humanoid. But, it is a needful work in order to film some necessary scenes, in which the humanoid clench its fist, or grab something. The work process will be posted divided into two parts.


Unlike in other parts, I directly carved lines to cut with an awl on an aluminium plane for the knuckles. It was to minimize the error range.

This is for one single knuckle(the X signs indicate redundancy).

Drill a 1mm-hole after leaving out the unnecessary parts.

We need 18 pieces in total.

Each of the pieces should be bent into a smooth rectangle with a round-shaped joint rolled up inside
like this.

Then, inset needles to make sure if the two pivot joints are in parallel.

Make 17 more pieces in the same manner.

Now, for the fingertip, drill a 1mm-hole on the aluminium plane as below.

And, bend it to make an arch.

We need ten pieces in total.

Then, prepare 10 pieces of nylon lines of 30 cm in length.

Fold a line in half, stick it to the end of the arch, and plaster the end with epoxy putty into a shape of a fingertip.

Combine the fingertip to a knuckle with a pin inside.

Likewise, make a hand with fingers.

Compare it with the other side.

Finally, cut off the unnecessary parts of the pins, and glue the areas with a steelweld epoxy adhesive.

Now, make 9 more fingers in the same way.