Either add G61 to the top of each g code file or manually enter it in the mdi prior to starting a program. That will be exact path following.
I prefer to leave a bit of blending and usually do a G64 P.003 or G64 P.005 to each file to make sure it's always used with the file.
The lower acceleration your machine is capable of the more it will cut corners in G64 mode with no tolerance. Putting a bit of tolerance P will keep it from cutting corners and also not come to a complete stop like a G61 will on occasion
