Check first.
Setup Parameters: Check your parameters agains the table in section 5.
If you are going to change anything, write down ALL the existing values before you start to experiment.
Look at items 18 and 33 in particular. Both of those will probably be the same.
Tell us what you find for each of them, or show us the whole table.
Don't just TRY things. That is doomed to failure. Analyze the problem to fix it.
Super X3. 3600rpm. Sheridan 6"x24" Lathe + more. Three ways to fix things: The right way, the other way, and maybe your way, which is possibly a faster wrong way.