Thanks Hood

Since I posted the question I found a calculation spreedsheet on this side and it stats that I had a right calc.

See below. (I do not know how to insert a file to this page).

I do not remember how much of but it was quit a bit - something like in the x direction 5mm instead of 10 and in z 30 instad of 10.

Of to bed now,- check it to morrow

Metric

Required inputs

Stepper Motor Deg/step - 1,8

Steps/rev - 200

Micro Stepping Pulse/step - 8

Pulse/rev - 1600

Gear Reduction Stepper teeth - 12

(Enter zeros for Lead screw teeth - 24

direct drive) Multiplier - 2

Leadscrew Pitch (mm) - 3,18

Thread starts - 1

Lead (mm/rev) - 3,18

Result *Steps per mm - 1007,87

Resolution (mm/step) - 0,000992

Input: Result:

Feed - mm/min 2500 pulse/sec = 41994,75

mm/sec = 41,67

stepper rpm = 1574,8

Stepper RPM 500 mm/min = 793,75

mm/sec = 13,23

pulse/sec = 13333,33

Pulse/sec 13333,33 stepper rpm = 500

mm/min = 793,75

mm/sec = 13,23

Distance vs. 3200 steps = 3,175 mm

Steps 1 mm = 1007,874016 steps