Interrupted axis movement

Hi ! i started having a problem with my 4th axis and also with the other axis (X, Y and Z)
Everything started while using the 4th axis.
The problem is that the axis makes small stops when it shouldn’t, which causes it to lose the coordinate since the Mach 4 continues sending the information and the axis apparently moves less than it should.

This is a link where you can see what i’m talking about

It also start to happen with the other axis, most of the time when moving from one position to another.

It seems like a comunication problem between the computer and the cnc, but nothing changed from the last program that i used las week.

I didn’t try it yet with the 3 axis, like cutting a plywood or making simple cuts, since this start to happend.

Let me know if any have an idea that what might be happening.

Thanks Guys !

I had that happen a few times when I was using Mach 4, I had an extension cord laying parallel to the ethernet cable and it was causing a nosie coupling issue.