Page MenuHomeAleph Objects Inc

M3 insert causing mounting issues.
Closed, ResolvedPublic

Description

The M3 insert's inner bloom is causing mounting issues. I have forcefully cleared plastic, yet this is not ideal for manufacturability. If we are able, can we create more of a void in this M3 hole?

Event Timeline

kforrest created this task.Sep 27 2018, 1:23 PM
kforrest triaged this task as Normal priority.
adam added a subscriber: adam.Sep 27 2018, 1:36 PM

@kforrest which part/location is this on?

adam claimed this task.Sep 27 2018, 1:39 PM
adam added a subscriber: DaniAO.

The back of the extruder mount. The lone M3 insert.

adam added a comment.Sep 27 2018, 2:50 PM

Are we seeing the same issue with Micro and standard? I thought that these were the exact same besides color.

kforrest added a comment.EditedSep 27 2018, 2:59 PM

They are not the same.

kent added a subscriber: kent.Sep 28 2018, 10:01 AM

If we used the same shape and size hole as the inserts on the y rod mount on mini, we should be ok, This is 100 microns bigger, and has a lead in chamfer.

@tutley can you add these changes to the mount model for both banded and dingy and push to repo? @david.hall we will need to stop printing PP-GP0345 and PP-GP0353 until we have an updated slice. Since these are still workable, just not as easy I'm not sure if we need to scrap everything we've already printed or not. @jessica head's up on another printed part change.

I have notified Cluster to stop printing these files. Please contact @EricNugent so that he can pull the files until this is resolved. That will inhibit the printing of the file.

@david.hall I have pulled the folders from cluster production. As soon as the new model is ready I can begin getting a new slice underway

kent added a comment.Sep 28 2018, 12:53 PM

I found these thermal insert test results, for reference http://devel.lulzbot.com/best_practices/

tutley added a comment.EditedSep 28 2018, 1:30 PM

sorry for the delay, both banded and dingy have been updated. V1.1 extruder mount has a 100 micron larger radius and a lead in chamfer, also a deeper pocket

adam added a comment.Oct 4 2018, 3:27 PM

Changes made and pushed to cluster.
@jessica can you scrap any PP-GP0345 and PP-GP0353 that are still in backstock and re-procure these parts from cluster to refill backstock buffers?

Yes, how many would you like run through the buffers?

adam added a comment.Oct 4 2018, 3:44 PM

Just enough to replace the ones in backstock = looks like 50 PP-GP0345 and 75x PP-GP0353

WH1/INT/63787 - PP-GP0345 x50
WH1/INT/63788 - PP-GP0353 x75

Buffers run for replacements

I was trying to help Lily get one of these set up on her desk and was unable to get the back screw to hold the toolhead securely unless we added several washers as a stop gap. There was a pretty sizable gap without the additional washers (Photos included)

@Galadriel i would be willing to bet that the m3 insert on the back of the extruder mount has plastic in the threads and this is preventing your screw from being able to fully tighten down, or it got cross threaded

@Galadriel The washers you are adding are on the back screw right? do you happen to have a picture of that screw? It should be the same distance as a regular aerostruder v2. @adam had me clean out the plastic in the threads of the initial beta units, but I don't think all 15 were brought to me.

@EricNugent I don't have a photo of the screw right now but I can run over and grab one in a little bit here to post. It was the back screw that needed the extra washers. I did a kind of cursory inspect on the heat set insert when I was running into issues attaching the toolhead and didn't see any plastic in the threading but I know that doesn't necessarily mean anything.

@EricNugent So with the angle that I had to be at to get a photo of that screw they all came out pretty terribly :( I couldn't get the camera to focus in the right spot. That being said I am attaching the two best pictures I got because you can still sorta see the stack of washer, sorry for the quality of the photos!

@Galadriel Thank you for snapping those for me. If possible can you pull out the screw from its assembly and measure the threads with a ruler? It should measure a total of about 29 mm

adam closed this task as Resolved.Oct 22 2018, 12:08 PM

The printed part has been updated and we have the new versions in production/cluster. I'm closing as resolved - we can reopen if we see more issues in the wild.