Q: How do I print from an iPad to a Ricoh sg3110dn?

If your printer doesn't support AirPrint

You'll have to install AirPrint enabling software on a mac or PC

http://www.ecamm.com/mac/printopia/

Or you could use a raspberry pi which is a low cost low power consumption, credit card sized Linux computer

As your AirPrint print server

http://rohankapoor.com/2012/06/configuring-the-raspberry-pi-as-an-airprint-serve r/

List of supported AirPrinters.

    http://support.apple.com/kb/HT4356

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printing to a non-airprinter from an iPad

To print from the iPad, your going to have to install some more software:

-- install a printer app on the ipad. many printer makers have iPad applications for their printers.  Look in the app store

-- install enabling software on a computer which you have connected the printer

For a comprehensive list of links,

   see Texas Mac Man list:

     https://discussions.apple.com/message/21291967#21291967

   or

     http://ipadhowtouseit.com/ipad-printing/

Helper app -- /print n share

Print directly to the widest range of network or WiFi printers available in any app. Alternatively print via your computer to ALL printers including USB & Bluetooth printers. View read and display large PDF, Office & iWork files. Easily transfer & store files from the Cloud or your computer.

https://itunes.apple.com/us/app/print-n-share/id301656026?mt=8