Patrick has kindly provided me with his basic machine MACH3 setup and asked me to post it on the forum. This should provide a great resource for us all. If anyone else wants to post a different setup, wouldn't that be the beginnings of a great resource we can all share!

So here it is direct from Patrick:

Method so you know:

Motor - 200 steps per revolution

Drivers for motors that will be moving via chain should be set to 1/16 microstepping

Actual steps per revolution - 200 * 16 = 3200

Now to find the steps per inch:

#40 sprockets are .5 inch pitch. At 9 teeth, you have 4.5 inches of travel for one revolution.

So, 3200 / 4.5 = 711.111111 steps per inch

There is your number to put into the step per.

If you are working in mm, try replacing the 4.5 inches with 114.3 mm.

So, 3200 / 114.3 = 27.997 steps per mm

For the screw, you have 2 turns per inch.

If you have 1/4 microstepping for the screw, here is the formula: 200 * 4 * 2 = 1600 steps per inch

for mm, there are 25.4 mm in one inch, or 12.7 mm in .5 inches. So, in one full revolution, there is 800 steps for 12.7 mm. Let's divide and see what we have... 800/12.7 = 62.99 steps per each mm.