Set Screw Mystery

[Neil]

Hello all,

I have an AR8+ with Rotary, which I purchased October 20th 2018. Love it , works perfectly and use it frequently for hobby and fun stuff.

Last Sunday (Oct 8th 2023), I was cutting a large board (3'x2'x1.5") when I noticed a tiny 4mm set screw (see pictures) on the board which was not there before. I suspect it fell from the gantry or Z-axis. I have looked everywhere I can't think of where it may have worked loose and fell onto the work piece. I have added pictures of the set screw. Can anyone suggest where it may have come from? The machine still works fine and I could just continue until something shows signs of misalignment or other issues, but I hate loose ends.

I have checked the Ball Screw fitting on Z and X axis. Also the greasing nipples. Took the motor mounts off and the Z-axis cap to check couplings. Still a mystery. It is of course possible it fell from somewhere else, stuck to my sleeve or perhaps stuck to a magnetic screw driver and just fell while I coincidentally was using the AR8. I can not imagine that there are that many set screws on an AR8. I have looked through the documentation and manual images of the construction. I have searched this forum without luck.

Not holding my breath, but any suggestions would be very much appreciated.

Regards,
Neil

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[grossmsj]

On the ProV5 there are four sets of set screws like that on the Z-axis linear bearing that rides up and down the rails. Each pair of screws sit adjacent to the rail. I don't know what they do, but they are between the thin plastic fascia that sits above and below the metal linear bearing.

[Neil]

Thanks grossmsj for the reply and time to take that picture. Yes, I have those too and they are all still in place. I believe they hold that black plate on.

Added picture to show they are both still there.

Neil

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[savannahdan]

Only place I could think of are the couplers and I think you said you checked those.