I dabbled over the last few weeks to no real effect. However, today when I went to check it out, I managed to get the problem occurring on video. Towards the end of the video, you can even hear the stepper skipping.
Any thought please?
Chazz
PS,
I had to send it to YouTube as it is too large for here even though it is only 31 seconds... It is unlisted so here is the link:
https://youtu.be/uLLdmX5ZCSA
Thoughts?