The invention relates to a novel method for enzymatic polymerization which includes obtaining a reaction mixture including a monomer, a template, and an enzyme; and incubating the reaction mixture for a time and under conditions sufficient for the monomer to align along the template and polymerize to form a polymer-template complex. In the case of storage of any unsent download request file, the printer collects from the other printers unsent download request files, which are stored in the other printers and have not yet been sent to the management server, and sends the collected download request files and the unsent download request file stored in the self printer to the management server. The planetary gear drive system can include a planetary gear system and a first clutch being substantially adjacent to a second clutch. 045% of a reducing agent selected from the group consisting of sulfite, thiodiurea, formaldehyde bisulfite formaldehyde sulfoxilate and mixtures thereof; andiii. When the guide is at the second position, the guide is configured to be tilted downward relative to a horizontal direction such that the leading end is lower than the trailing end.