Machine momentarily halts on each cut pass?

[marbles]

Open Windows Task Manager and monitor CPU usage while it's running.
See if the CPU usage spikes when the machine hesitates.

Thanks Gerry,

Good advice. I ran a file which went on for an hour or so and watched the CPU usage and of course not a squeak wrong with it haha. Typical

i'll keep the CPU usage up though to monitor incase and indeed when it returns, becasue we know it will