The riser of a commutator can be constructed in various ways:
• Solid commutator:
A slot is made in the riser of a full-copper commutator, an operation
that is performed at the end of the production process.
For larger commutators, the solid cupper must sometimes be replaced by
copper plates that are placed in the copper segments. The risers can be
tinned, which is an advantage solding with tin.
Both with risers as with solid, the slots for balance connections can
be made. In a special application, these balance connections can be provided
on the front of the commutator.