Hi
I am having the same problem, have you found a solution ?
This is how It occurs on my machine....
I have purchased aspire 3 upgrade, last week. I have run preliminary tests: The z-axis is diving down while cutting, it progresivly lowers its posision while cutting a 3d image, not by much but it is steadily working its way down into the table. I have found a thread about this on the aspire forum but there was no resolution to this problem, I have taken all the steps sujested but I am still having the same problem with the z axis.
I am pograming on a computer running vista, 6gb ram - then exporting to a computer running xp via a memory stick, into Mach3, this computer runs my cnc router, I have sucsesfully used V-carv pro on this machine before Aspire with no such problems.
Please advise....