[pikolo]

So i built a cnc not that good but its ok for me...I run it for abouty one month with no problems...then i increased the velocity of the motor and acceleration to speed them a little...suddenly the machine stopped working...what happened is this the motors became to slow and they dont even turn like they dont have any power...also when i reboot the pc befor it even load the bios it starts doing a noise the z motor...alla the lights on the machine are as they should be and nothing looks burnt...i changed the velocity and acceleration option again and the problem insists...also the fuses i have placed are ok....can someone please help me?i am desperate... i have uploaded a video showing the sound of the motors...also now only the z motor is spining and the other two no...(the pc is old and has lots of problems if this could cause the problem please tell me)

http://vid236.photobucket.com/albums...414_114445.mp4

[pikolo]

I have new info! i Changed the parallel cable and now the noise stoped and the z axis motor is working perfect!! the other two motors still not working but being at locked position!Any thoughts?