#rock saw

so i was trying to cut through this darn limestone sample and my rock saw just wouldnt make a clean cut... tried everything, different blade, more water, you name it. what finally worked was adjusting the blade depth... makes sense i guess but it took me way too long to figure that out. has anyone else had this problem?? are there any other common issues with these things that i should be looking out for... because honestly im surprised it was something so simple