Hi gr5
Many thanks for your suggestions, I have lifted the build plate during the limit switch test as you suggest, that all seem fine and the switch disengages correctly. There doesn't seem to be any plastic waste in or around the switch. The axis move fine and I have oiled them again to ensure smooth operation. I
I taken a video of the issue but I can seem to attach movie files to messages in this forum? Weirdly it also seem to happen at the particular point of the cycle, I guess it might the be power supply, but there doesn't seem to be any issues with heating the nozzles which would draw more power - could it be the main board?
Cheers
Tavs