The values are in two places. You can either change the max velocity in stepconf, or manually edit the INI file.
To be honest, I would normally suggest accepting that Stepconf's work is done, and start editing INI and HAL directly.
However yo have not yet configured limit and home switches, so perhaps you should use stepconf.
The reason that this is an either/or is that Stepconf is write-only. It uses its own internal data to write HAL and INI and will over-write any changes that you make in those files.
The numbers in the INI file are 4.36 in/sec. To experiment you can change them in the INI and restart to see what works.This is probably a faster cycle that using Stepconf until you know the numbers you want.
In the INI, each axis has a section like this:
[AXIS_0]
TYPE = LINEAR
HOME = 0.0
MAX_VELOCITY = 4.36580882353
MAX_ACCELERATION = 20.0
STEPGEN_MAXACCEL = 25.0
SCALE = 6400.0
FERROR = 0.05
MIN_FERROR = 0.01
MIN_LIMIT = -10.0
MAX_LIMIT = 10.0
HOME_OFFSET = 0.0
Just change the number higlighted in red to the inches/sec that you want.
(Incidentally, I am fairly sure that Stepconf asks you for the max velocity, rather than choosing it for you, but it is many years since I used stepconf)
