Right . I have tried all combinations of pulse width and dir pulse but to no avail , so I have reset both to the original setting .
After a couple of changes the program and machine ran fine to a predetermined stop in the program . However when I rewound the program , and started the program with the axis at a different start point , the problem arose again . Badly .
Whilst writing this reply I had a thought and I have just checked the original brochure for the machine and have found that at 100% feed , rapid traverse rate is 350mm/min , and programmable feed rates to 300mm/min .
Me thinks I will try again .