Nimbal is a railway station on Sholapur- Bijapur route. Passenger trains stop there. From Mumbai, Pune , Bangalore, etc. you have to go via Sholapur. You can take connecting train from Sholapur to reach Nimbal station. Ashram is just near the station. However if you do not have a convenient connecting train, you can take a taxi from Sholapur to Nimbal. It costs about Rs.1800 (with return fare).
Alternatively you can take Sholapur � Bijapur bus, which stops opposite Sholapur station. There is a bus every half an hour. You have to get off at Horti on Bijapur road. From Horti you can hire a tumtum (a three wheeler) to go to Nimbal Ashram. However train or taxi is more convenient. If you are coming from Bijapur side, you have to take Bijapur- Sholapur train, or a taxi to Nimbal or a bus (to get off at Horti).
Alternatively you can travel by car or taxi from Mumbai or Pune or any other place. You can reach Nimbal via Sholapur or Bijapur. You have to take Sholapur- Bijapur highway and turn off at Horti for Nimbal. You can also arrive at Sholapur or Bijapur by bus from Mumbai, Pune or any other place and proceed further to Nimbal.