Hi Terry,

First, you can't set motor tuning until you have the correct Steps per setting , your just wasting your time if you do.

The steps Per MM setting isn't something you can guess at. It's a fixed calculation based on several other parts of the machine. Luckily it's simple enough to work out.
I'm working this out on a typical stepper with a 1,8deg step angle or 200 steps per revolution.

First, you need to know the pitch of the lead screw, or simply put how far that axis travels for one revolution of the lead or ball screw.
Next, you need to know the micro-step setting the drive is set to.
lastly, if you have any ratio between the motor and lead screw you need to know this.

So let us say you have a 5mm pitch with 1600 micro steps set on the drives and you are directly driving the lead screw. The calculation for steps Per is this:
1600 / 5 = 320 Steps per mm

If you had let us say a 2:1 ratio between the motor and screw then it would be.
(1600 / 5) / 2 = 160 Steps per

When you have set the steps per correctly and it moves the correct distance then you can start adjusting the motor tuning.