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x lower bearing holder interference on bearing
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Description

@west When the bushing is pushed in all the way for the correct retaining ring orientation, there is interference with the bushing stop in the printed part. I have attached an image of the interference.
We can get an assembly that works, but this has greatly increased x carriage drag on some machines. I believe we can roll in a correction for this issue as the assembly is still working in most cases.


tagging @david.hall @kent @Steven @logan @oliver @MikeR @EricNugent @bigmansas @franklin @samantha

Event Timeline

tutley created this task.Apr 29 2019, 1:09 PM
DaniAO added a subscriber: DaniAO.Apr 29 2019, 1:13 PM

@tutley @west We will need to do a change order to update this on Quivers.

west added a comment.Apr 29 2019, 2:03 PM

If we change to 12mm bushing retaining ring to be shorter by .75mm it will fit nice

west added a comment.Apr 29 2019, 2:07 PM

or we can make the divider piece smaller and keep the retaining ring the same

west added a comment.Apr 29 2019, 2:11 PM

or add a chamfer to the id of the retaining ring to accept the end of the bushing

@west the x double bearing holder would also need to be evaluated with the retaining ring adjustment. I am sure it would be fine though.

@EricNugent @west How long would you like to test this? (needed for change order)

Also, will there be an OHAI or the GP reference list that will need to be updated at all? Or any other documents?

logan removed a subscriber: logan.Apr 29 2019, 2:44 PM
west added a comment.Apr 29 2019, 2:46 PM

The gp reference list will need to have a new image, and weight. On the ohai, it might be a subtle enough change where you cant tell the difference between the old in new

Change order has been started T6936

all OHAI's will need to be updated with the actual positioning and any changes made to the procedure so that any tech that needs to build a part will have clear instructions.

@david.hall the positioning will remain the same. I do not think an OHAI update will be necessary as the part will look the same externally as it does now. If there is further confusion with the part orientation or if you or your technicians need more training on this process we can help where we can.

DaniAO claimed this task.May 14 2019, 3:04 PM

jlively6:22 PM 5/25/19
For the X Double Bearing Holders (AS-PR0140) we had to put the bottom retaining rings in upside down. Right side up was way too tight, and took an incredible amount of drilling to make it barely passable. With the bottom rings reversed, everything snapped in place correctly, the rings are locked in tight, and the bearings now pass. Until we get the slice corrected, this is all we can do.

I copied this from the Cluster chat. We will have to confirm this after the holiday

@david.hall The retaining rings were popping out in the drop test when installed in reverse like this.
If machines have been built like this and have since shipped there is a possibility the rings will pop out during shipping.
There should have been an MCO before you implemented any change

@tutley , No machines have been built this way and no parts have been delivered this way. My weekend lead thought, (for some reason) that he should build them this way. We are removing all of the AS-PR0140's that he built before we make a delivery of parts this morning. Then we can try to see what happened to the slice when we look at the parts that we have built. We will get the input from MER on it once we see what he did. I put @jlively cluster chat post here, so we could follow up on the issue, when I came in Sunday to do payroll, so that the problem would not be overlooked. We will follow up today and see why we have an issue that was not present before.

@david.hall okay sounds good!
I know @west updated the model to remove the bushing interference, which will help with this issue. Im not sure if the ECO has been closed out yet though. do you know if you are printing the updated model yet?

I will get with MER this morning and see if the latest file is pushed, and if so, that we don't have any issues with it.

It appears that it was the old file that does not have the updated bushing retention area. That file is being tested in MER currently. Hopefully we will have it directly. We will adjust the bushings and reinstall the snap rings correctly on the parts that were done this weekend. I will make sure that my weekend crew knows about the file, if we don't have the new file pushed by this weekend. This has been resolved.

west added a comment.Tue, Jul 16, 9:11 AM

Can we close this?

tutley closed this task as Resolved.Tue, Jul 16, 9:20 AM

the change order is past deliverables review. just waiting on the notification that it is rolled into production. I think we can close this one out