A common complaint with wire EDM is wire breakage. The manual's "Wire Drive System" section explains:
X8 Wire Cut System CNC Wire EDM DK7763 - Multifunctional Wire EDM Machine with 2-Year Warranty and Precision Cutting Up to 0.02mm. Alibaba.com X8 Wire Cut System Manual | PDF | Machining - Scribd X8 Wire Cut System Manual Pdf