Changed over from 13 TPI to 2 Turns Per Inch, Help!

[KnotsAboutWood]

Hi,

Using the book written by Patrick Hood-Daniel, I built my first machine. Was working fine up until the Z axis starting grinding. So I replaced the 13 TPI steel rod and nut with an ACME 10 TPI (5 start) and backlash nut. Rides very smoothly now, but I have no idea how to reconfigure Mach 3.

I believed that I could just change the TPI number in the equation 200*13*4 where 13 is the TPI.

However I've been told that it's not really that easy.

Can anyone direct me to where I can find this info?

Thanks

[ger21]

if using 1/4 microstepping, then yes, 200*2*4 = 3200