ona db series - new high-speed pulse technology, which allows to get the following results: shorter machining times in jobs that involve very difficult flushing. more homogeneous finish on large surface areas (vdi 20 ......ona db series - new high-speed pulse technology, which allows to get the following results: shorter machining times in jobs that involve very difficult flushing. more homogeneous finish on large surface areas (vdi 20 on 225 cm). very deep grooves can be machined, with the highest quality and precision guaranteed (vdi 20 up to 100 mm). - the expert system featured in the generator of the ona db 300 models ensures totally automated production with one hundred percent performance and an excellent finish. - surface finish of up to vdi = 0. this machines include a high-performance generator in removal operations, while at the same time preserving the electrodes and allowing excellent performance in fine finish mode (up to vdi = 0). - subsurface injection function. a great aid to speed when the injection points required by a mould are being realized. - important savings. the filter featured optionally in the ona serie db machines guarantees over 10,000 hours in operation with zero maintenance costs. filtering quality is excellent (1 micron).