Ballscrew Temperature v's current usage plots

[Dean250776]

Hi

I am currently working on a quantification exercise on ballscrews and their ability to drive focus lens assemblies at very low temperatures (-46ºC), acheiving a speed of 0.1m/sec. I am experienceing increased voltage usage at below -20ºC and am unable to achieve the required speed, which reduces by 40%.

Does anyone know how to minimise static and dynamic friction at these low temperature. Lubrication is minimum due to migration of the media onto the optics.

I hope you can help.

Regards,

Dean250776

 

[VEBill]

NASA has a Tech Tips (or something like that) website that should (hopefully?) have some useful information buried on it somewhere. I know that low temperature and low contamination lubrication is a huge issue for most space hardware. It is a problem that was solved many years ago.