Fig. 7: Coil with capacitor
Next, we proceed with the ready-made cables. The dual cable has been dimensioned at 70 mm,
stripped, twined and tinned at the cable-endings. Solder the cable-endings directly entwined to the
capacitor-endings with the endings and pointing in the same direction as shown in fig. 8. Polarity is
irrelevant. If you have a multimeter you may now measure the resistance between both cable-
endings. The resistance-value is to be approx. 30Ω. If the value exceeds 60Ω you should check the
proper removal of the isolation layer at the thin copper wires, the soldering quality and any ruptures
of the soldering and cables. Should the resistance-value be much lower (< 10Ω), you must check for
short circuits at or near the soldering area. Unfortunately you are unable to detect short circuits
within the winding area.
Fig. 8: Coil (assembly completed)
2.2 Inserting the coil assembly
To insert the completed coil assembly into the robot, you start by removing the ping-pong ball.
Right now you will be grateful if you have glued the ping-pong ball at a minimal number of points
instead of an overall glued area of the component.
Proceed by glueing – again using an
instant glue –
the coil at the backside under the ping-pong ball
(see fig. 9).
