CNC12 only does that if you have bit 0 of Parameter 4 set (e.g. P4 = 1, 5, or 9).martyscncgarage wrote:I never have had an issue. When you point CNC12 to the file on a USB drive, it immediately copies the file the C:\CNCM(T)|NCFILES directory.
Having that bit set is the standard configuration, but it can be turned off if you prefer to just use the file where it sits.
There is also an option (via bit 1, value +2) to "cache" CNC files. With this option a temporary copy of the current job is made on the c: drive, and the control runs that temporary copy, but it is deleted and replaced when you load a different job.