Hey everyone.

So I've finally finished my shoot, it was a very busy ten day shoot but glad to be working given how things have been this year.

Now I've got time to investigate a bit further, I removed the ballnut from the carriage and moved each component individually. The carriage moved perfectly on the linear rails, no sticking, juddering etc. Moving the ballnut by hand it did feel as though it was oscillating a little rather than moving perfectly on axis but it's hard to say if what I felt is normal given I have so little experience with these machines.

When I put the ballnut and carriage back together the problem returned. This suggests to me that the issue resides with the ballnut + ballscrew but I'd love to hear opinions. As usual I recorded a couple videos so you guys can see what's going on.

https://drive.google.com/file/d/1EfN...ew?usp=sharing

https://drive.google.com/file/d/1Ele...ew?usp=sharing

In the meantime, the Chinese company have asked me to locate the issue and then they will send replacement parts. As such I'd really love to hear what you all think. Am I right in thinking the cause is the ball screw? If so, is it difficult to replace this part?

Thanks!