An end user network access point monitors and collects usage statistics associated with all content accessed by the end user devices through the access point. Accordingly, wire metal powder is hardly generated from the wire electrode even though the wire electrode rubs against the chuck part electrodes. The first connector has several pins complying with a specific connector specification. When the front edge of the paper is moved to the second roller assembly, the first roller is driven to be rotated at a higher speed by the paper.