Need Help!- motors lock but nothing moves!

[bikedude987]

I'm in the process of setting up my mill. I'm using EMC2 and Keling 4030 drivers with a C10 BOB. I have the axes wired up exactly according to their website, but haven't wired in things like the limit switches or estop yet. During configuration, I can plug in the power supplies, and the motors will lock, but when I go to test them, they will not move. They seem to make a kind of random clicking when I try to jog or run them, but will not move.

What could be wrong?!

[ninefinger]

sounds like the dir and step pins are reversed - try changing them in step config and see if that makes a difference.

Mike

[bikedude987]

i changed them but then tho motors wouldn't even lock. what type of parallel port do i need to use in the bios? EPP? ECC?

[bikedude987]

figured it out.

had to check the 'invert' checkbox to get anything to output. all the axes work now.

can anyone explain why i had to do this?

[photomankc]

Sounds like the driver was set to active low so it expected the pulses to be drops from high to low for step/dir instead of what people generally think of, low to high.