Welcome to the Windows 95 driver demo for Servo To Go, Inc.'s ISA
Bus Servo I/O card.

This demo has two main purposes.  First, it shows how easy it is
to use our board and software. Second, customers who have
purchased our Servo I/O card should find this demo useful to test
their hardware and find PID coefficients.  The demo consists of:

    1) A Windows 95 virtual device driver.  Only the executable
       code is included, however, the source is available for
       licensing.

    2) An example application, "vbtune," written in Visual Basic.  We
       include both source and executable for "vbtune."

This demo initially comes as a compressed file named vbtune.zip. 
We recommend you unzip it into an empty directory.

Note that this demo works whether or not you have one of our
boards.  If you don't have a board, motors are simulated; if you
do have a board installed and some servo motors attached, it runs your
hardware.

When you install this demo, it will register itself with Windows
95.  So, you can uninstall it easily.  Uninstallation
instructions are near the end of this document.

Run "setup" to install the demo.  Setup will create a directory,
named c:\Program Files\vbtune by default (this can be changed
from within setup). In the directory you should find:

    readme.txt   -- This file.
    stgdrvr.vxd  -- Windows 95 virtual device driver for I/O card
    frmvbtun.frm -- Visual Basic source
    frmvbtun.frx -- Visual Basic source
    header.bas   -- Visual Basic source
    loadstg.bas  -- Visual Basic source
    vbtune.vbp   -- Visual Basic Project
    vbtune.exe   -- Compiled version of Visual Basic program
    loadvxd.exe  -- Program to load or unload a VxD

You don't need Visual Basic to run the compiled program.  While
the compiled program needs several run-time libraries, all these
were installed during setup.   However, you will need Visual
Basic 4.0 Professional to make sense of the source code.

A shortcut to vbtune will be on your start menu.  So, one way to run
the demo is: click Start -- Program -- vbtune.

Briefly, "vbtune" drives a selected servo with a pulse or ramp,
then graphs the resulting motion.  Typically, you change the PID
coefficients and try again, observing the new results.

"Vbtune" was designed to be self explanatory.  As you drag the
mouse over a control, the box at the bottom of the frame will
explain what that control does.  But here are two additional
hints to keep in mind: 1) Remember to "send" new coefficients to
the axis; they don't take effect until you do.  2) Make sure the
"closed loop" button is selected; otherwise nothing interesting
happens.

To uninstall this entire demo, go to Control Panel -- Add/Remove
Programs -- select vbtune from the menu of programs which can be
uninstalled -- then hit the button Add/Remove.

As the demo is uninstalled, you may get some warnings about
deleting some libraries (dll's or ocx's).  If you haven't
installed anything since this demo, it is safe to delete all
these.  If you've installed other stuff since installing this
demo, there's a slight possibility that the new stuff decided to
use libraries that came with this demo, but didn't register the
fact correctly.  This is rare, but it happens.  

You also no longer need the directory where you unzipped the
setup files.  Delete it now, if you want.  The original zip file
is sitting around somewhere on your hard disk too.  You may want
to save it for a while (in case you want to show this demo to a
friend), but, at some point, you'll probably want to delete
this too.

Comments or questions to:

    Servo To Go, Inc.
    8117 Groton Lane
    Indianapolis, IN 46260

    Phone: 317 257-1655
    Fax: 317-251-39580
    Email: info@servotogo.com

Note: loadvxd.exe is Copyright (c) Vireo Software, Inc., Bolton
MA.  It may only be used in support of a VxD developed with their
software, as stgdrvr.vxd was.  It cannot be redistributed
generally (i.e. it can only be used with this demo).