It is very strange, when mach3 work  none of my motors would work properly. They would only turn slowly and vibrate profusely，lose steps.
1 i set Task Manager-Processes-mach3.exe-affinity - cpu0 or cpu1 ,   it not useful,motors still slowly and vibrate profusely
2 when mach3 working ,i run any other software at the same time , the Motors  run smoothly immediately。
3 i set win+r-msconifg-boot.ini-advanced-/NUMPROC(N)=1，reboot laptop, the Motors  run smoothly immediately
please help , i dont want use only 1 cpu  ,coz it is core 2 dual
regard!

Which motion controller are you using ?

Tweakie.

Which motion controller are you using ?

Tweakie.

i use LPT port motion controller
cpu is Intel Core 2 Duo processor, P8700 - 2.53GHz, 1067MHz FSB, 3MB L2 cache

Unfortunately Mach3 will not operate correctly using a Laptop with a Parallel Port - you need to be using a PC with Parallel Port or a Laptop with motion controller.

Tweakie.

The Mach3 requirements are here;  https://www.machsupport.com/software/mach3/

Tweakie.

Unfortunately Mach3 will not operate correctly using a Laptop with a Parallel Port - you need to be using a PC with Parallel Port or a Laptop with motion controller.

Tweakie.

so i need change an usb motion controller ?i thought parallel port is better than usb 

If you decide on a motion controller then choose one from EU or USA manufacture - avoid anything from China.
If you choose anything from a business that is listed in this thread then forum support may be limited; https://www.machsupport.com/forum/index.php?topic=24331.0

There are many to choose from but the Warp9 ESS is good.

Tweakie.

If you decide on a motion controller then choose one from EU or USA manufacture - avoid anything from China.
If you choose anything from a business that is listed in this thread then forum support may be limited; https://www.machsupport.com/forum/index.php?topic=24331.0

There are many to choose from but the Warp9 ESS is good.

Tweakie.

  thank you  .
this is the video of the problem  https://www.youtube.com/watch?v=PWwS_NvnwKg

Try following the instructions in this link
http://support.machsupport.com/en/kb/articles/mach3-xp-optimization-txt-steps

especially changing from ACPI to standard PC

Marsha
Driving my CNC with old Dell D600 1.6mhz laptop