Bended ballscrews. What i can do?

[ba99297]

I contact with Chai i ask him to see the videos and he told me
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Dear Vagelis,
Can you adjust it as this linked instruction:

Screw Shaft Straightness

AS you know, the ballscrews have to be checked and adusted Before they are mounting to the machine.

Thank you very much for your consideration and cooperation!

Chai

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Has anybody followed the above procedure for ballscrew straightening?
I am not sure for the result.

[JAZZCNC]

Has anybody followed the above procedure for ballscrew straightening?
I am not sure for the result.

Yes it's standard way to straighten any shaft not just ballscrews. . . . BUT . . Trust me on this Vagelis chances are they will be OK when on the machine and setup. If any is bent enough to cause a problem then it's not difficult to straighten them like is shown in the link above and often this can be done in a standard vice with pair of V blocks. It doesn't take much effort to straighten screws just a little patience.!

[Jonathan]

Personally I'd have a go at straightening them. Whilst the machine will probably 'work' with bent screws, the life of the system (particularly the ballnut) will clearly be lower. How much lower is hard to say, but why take that chance? It's a similar reason for why you shouldn't exceed the critical speed of the screw - whilst sometimes it can look OK as the nut guides the screw, it's still putting larger than normal radial forces on the nut which the nut isn't designed to tolerate.

I straightened a RM1204 ballscrew a while ago. It wasn't challenging.

often this can be done in a standard vice with pair of V blocks. It doesn't take much effort to straighten screws just a little patience.!

Just remember not to use steel V-blocks as you could damage the threads on the screw.