Kuwumpompi osetshenziselwa ukucubungula nokufaka uchungechunge lwangaphakathi lokufakwa kwezikulufu zezintambo, okwaziwa nangokuthi ompompi be-ST kanye nompompi bezikulufa.Ihlukaniswe yaba ompompi bemigodi eqondile, ompompi be-spiral groove kanye nompompi be-extrusion ngokuya ngokuma kanye nendlela yokwenza imicu.