Bad clanking sound when moving the print platform


Juz finish one of my print and it was working alright. Suddenly there is some clanky sound when moving the build platform vertically. Check the video:

Bad Clanky Sound

and I juz found out there are two screws that are gone (parts of the screws are still attached in the power supply). Wonder how to take it out.

Please write e-mail with your shipping address to looks as Z coupler failure it will be shipped ASAP to you.

Best Regards