help me in stepper calibration

[rimawi2008]

hello , every one

i have a problem with mach3 i make my calculation for step per and it is 119.2 i add this to mach3 motor tuning and select mm as my unit
the "step per"mean when i send 119.2 pulse the machine move 1mm .
but mach3 move 5mm when i use microcontroller and send 119 pulse the machine move 1 mm
i tray to make calibration in setting alt6 but it doesnt work ?

what can i do ??

[neilw20]

Look at the Mach3 manual 5.5.2.3 ... Automatic setting of steps per unit

[rimawi2008]

thank you neilw20 for replay
put i tried it and didnt work good it is stell error

[zeed]

Recently had some serious calibration problems,could not calibrate my X axis to move with precision.When calibrated on short distances it made a mess on longer distances and vice versa...
After a lot of mecanical repairs problem was the same.
And solution:Changed my pp port setting from ECP to EPP and problem solved.
Do you have microstepping on your drivers?
What is your leadscrew pitch?
ps:
I always use mach3 calibration and it works exelent.

[rimawi2008]

thank you zeed for replay
i used microstepping motor driver that i design , i design it to make one revolution when take 6400 pulse
and my driving system is belt
there is the way how i calculate my parameter
1- make one revolution of motor by sending 6400 pulse from microcontroller and measure haw axis move and it is 53.69 mm
2- then i calculate the step per unit by this equation 6400/53.69 = 119.2 pulse
3- i put this value in config > motor tuning > step per
4- i tray for get my best velocity and acceleration by moving cursor and apply the new parameter
when i tried to move the x and y axis 5mm by g1 x5 y5 z0 they move incorrect value i tried calibration in setting alt6 but it doesnt work best value is error about .4mm and it is large error.
when i send 119 pulse from microcontroller to my machine it is move exactly one
mm.
how can i convert my lpt from ecp to eep?
thank you

[neilw20]

ECP settings is in BIOS.
Reboot computer, while hitting <del> key (is most common)
Or read the mother board manual.

[rimawi2008]

thank you