gritty ballscrews

[Voicecoil]

Thanks for the advice and the link to the video; I don't think it's oversized balls as the roughness it intermittent, sometime you can do a turn or 2 OK, then suddenly it graunches and feels dog rough. Also looking at my hands after handling them I see tiny flakes of swarf which points to bits getting into the nuts. Hopefully as I've caught it before running them with motors there won't be any damage, but I'll take a close look at the screw for signs of scratching. Cleaning and repacking looks like a job for a long winters evening, though with the amount I have on at the mo. I could do without it!

[Voicecoil]

So I ran one of the shorter screws through a piece of tissue paper and sure enough there's little flakes of swarf amongst the grease:

Whilst doing this I also noticed that the depth of the residual thread where these 1204 screws had been machined down to 10mm was different one one side to the other:


This says to me that the end machining is off centre, not so good ......email on it's way to Fred, just hope he has time to sort something before Chinese New Year.

[routercnc]

For info I can't open the attachments. If I hover over them it shows no views so suspect I am not alone.

The graunchiness might be a missing ball, and/or not smoothly going round the plastic ball return track. Ask Fred how many balls there should be in there (mine are 1605 so different to yours).

[AndyGuid]

Yep, I can't access the attachments either.

Get message "Invalid Attachment specified. If you followed a valid link, please notify the administrator"

[Voicecoil]

I don't know what happened to the pics, they were there when I checked the post. I've put them up again, take a peek before they disappear again!

[Voicecoil]

Well, I got a very apologetic email back from Fred, apparently they were rather rushed getting stuff out before Chinese New Year. He's suggested removing the seals and flushing through, apparently this works a lot of the time and is obviously easier than complete dis-assembly.

[phill05]

apparently this works a lot of the time and is obviously easier than complete dis-assembly.

An hour or two spent stripping down, clean properly, and repack would in the long run save you some pain in the future.

Phill