By air. There is an airport at Tiruchirapalli, (airport code TRZ, for the use of travel agents!), which has connecting flights with Chennai, and Colombo (in Sri Lanka) and taxis are available at the airport direct to the Ashram (cost around 800 Rupees.)
By train. There is a railway station, Tiruchirapalli (known as Trichy) Junction, (TPJ station code for use when booking!) which has trains from Bangalore, Trivandrum, Cochin, and Chennai passing through. Taxis are available direct to the ashram, cost 700 Rupees. Train tickets, which need to be bought in advance, can be booked from overseas, using www.cleartrip.com
Regular buses also run from Trichy ‘Central Bus Stand’ to Karur, via Tannirpalli and Kulithalai. However, if you have large luggage, it is advisable to go by taxi!