a service station for cleaning and sealing the print head of a print module in a printing system is provided . the service station comprises a base , a first direction - changing mechanism , a first moving mechanism and a wiper . the print module drives the first direction - changing mechanism , which drives the first moving mechanism and hence the wiper to clean up the print head . furthermore , the service station comprises a second direction - changing mechanism , a second moving mechanism and a cap . the print module drives the second direction - changing mechanism , which drives the second moving mechanism and hence the cap to seal the print head .