Prusai3 axis not moving Hi guys, I just bought a prusa i3 DIY kit from a company in China and have it assembled fully except for the hot end and the printer works on a Melzi board. The problem is that the axes were responding in a random manner. There will be times where all axis works good but then when i replugged the usb cable to my computer, one of the axis just stops moving. Sometimes, hammering noises even comes out from one of the axis (but its not frequent) Firmware: In the beginning, I was suspecting that there may be a problem with the firmware so I tried uploading the exact same firmware to my friend's diy stage but his x,y,z axis works fine. End stops: I also tried changing the connections for all the end stops but the randomness still do not stop. Can anyone advice me on how to go around with this? From what I know, every connector for the Axis motor has A+ A- B+ B- Another question that I have is whether the order of the connections of the motor matters in this case? https://reprap.org/forum/read.php?151,323681,323681#msg-323681 Thu, 12 Mar 2026 15:31:39 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?151,323681,323681#msg-323681 Prusai3 axis not moving https://reprap.org/forum/read.php?151,323681,323681#msg-323681 I just bought a prusa i3 DIY kit from a company in China and have it assembled fully except for the hot end and the printer works on a Melzi board.

The problem is that the axes were responding in a random manner. There will be times where all axis works good but then when i replugged the usb cable to my computer, one of the axis just stops moving. Sometimes, hammering noises even comes out from one of the axis (but its not frequent)

Firmware:
In the beginning, I was suspecting that there may be a problem with the firmware so I tried uploading the exact same firmware to my friend's diy stage but his x,y,z axis works fine.

End stops:
I also tried changing the connections for all the end stops but the randomness still do not stop.

Can anyone advice me on how to go around with this?

From what I know, every connector for the Axis motor has A+ A- B+ B-
Another question that I have is whether the order of the connections of the motor matters in this case?]]> confused_J General Mendel Topics Wed, 12 Mar 2014 10:45:32 -0400