Okay Mach3 and my motors are not understand each other.
Mach3 shows that machine moved on 1.5 inch, but when i measure it on machine table it moved way far that Mach3 shows.
I also think Mach3 doesn't recognize my motors.

Can anybody help me with that???
I'm newbee with Mach3

Thanks in advance.

Mach doesnt care about your motors as long as your drives take step and direction.
What kind of motors? If servos whats the encoder count, if steppers what microstepping do your drives have?
What is the pitch of your leadscrew?
Do you have any gearing between motor and screw?
Hood

well i try to find out any info for my motor, and i can't find it anywhere.
but there are two pictures. as you can see that I have gear!
Thank you "Hood" for helping

well this is what I could find for my motor
103H7126-5740 – Single shaft
1.6(226.6) N•m (oz•in) MIN.  -  Holding torque at 2-phase energization
2 A/phase  -  Rated current
2 /phase  -  Resistance
9.1 mH/phase  -  Inductance
0.36(1.97) x10-4kg•m2(oz•in2)  -  Rotor inertia
0.98(2.16) kg(lbs)  -  Mass(Weight)

So could you anybody still help me

Ok your motor is a stepper and its the normal 1.8 degree type so 200 steps per revolution. I still need to know the pitch of your ballscrews and the type of drives you have so that I know the microstepping value and lastly whether you have any gearing between the motor and the ballscrew.
Hood

Okay the gear rack is 20 DP
Gear on motor shaft has 0.6940 in - outside diameter and has 12 teeth
and i use GECKODRIVE G210

And the stepper drive make or microstepping if you know it?
Hood

 G210
    *
      7A, 80VDC 10-Microstep drive
    
I'm sorry if I don't understand something. English is not my native language, but i try to do my best
Thank You!

No problem, your English is pretty good
Ok so stepper is 200 steps per rev and microstepping is 10 so thats 2000 steps per rev of the motor.
I am not great with rack and pinion but I think 20 DP means it has 20 teeth in 3.1416inches so one tooth would be 3.1416/20 = 0.15708 inches. Your motor gear has 12 teeth so that would be 12 x 0.15708 =  1.88496 inches per rev
1/1.88496 = 0.53052 revs per inch
so finally 2000 x 0.53052 = 1061.0305 steps per unit.

I think

Hood