Quote Originally Posted by Voicecoil View Post
BTW, did you check the ballscrew for smoothness throughout its' length before mounting it?? As I mentioned in my thread here: http://www.mycncuk.com/threads/12524-gritty-ballscrews , although Fred tries hard to please, his engineers don't always seem to adhere to the old saying "cleanliness is Godliness" when it comes to machining ballscrews. Even the replacement parts he sent me needed a clean, strip down, flush through and re-grease before they were acceptably smooth. Try running (twisting) the sticky portions through a piece of clean tissue and then examine under magnification to see if there's any small flakes of swarf.
I think you may be right. I need to dismantle much of my machine anyway so best get to cleaning the ballscrews!

In my hurry I didn't attach the nipples to my HIWIN carriages so this is probably a good opportunity to do that as well. I see you have made a post about these nipples: Do you know if the following are a good way to go for greasing the carriages? Are they also suitable for greasing ballscrews/nuts?

https://www.toolstation.com/laser-grease-gun/p29224
https://www.toolstation.com/lithium-grease/p89691