Sprocket on Y-axis came out

The sprocket on one of my Y-axis rail assemblies has come loose. Not sure how it is supposed to be held in, but I’m certain it needs put back in. Anyone else have this issue?

Hmm… From what I can see, it looks like they have backed out completely. As in: not there at all. Rats. I will call Support tomorrow and see if they can either send me some replacement screws or let me know where I can find them.

Thank you for the response! Very helpful.

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That looks like a wiper to keep dust from getting into the bearings. I don’t have my 1F yet so I can’t comment on what keeps it in place. I did a quick search to see if there’s an image and this came up.