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toolhead doesnt sit flat against the x carriage
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Description

I saw an assembly in production where the toolhead wasnt able to mount flat against the x carriage. I believe there is a tolerance stack between the x carriage and the toolhead mount that interferes with proper mounting

Event Timeline

west created this task.Jun 6 2019, 1:45 PM
adam added subscribers: logan, adam.Jun 7 2019, 9:05 AM

@logan do you think this is the same issue as T7661?

logan added a comment.Jun 7 2019, 9:26 AM

I think this is part of what was mentioned in T7661 but I think is an additional issue. If I understand correctly, the misalignment is due to interference with the lower bearing holder and this issue is with the upside down Y shaped feature being too large vs some of the tool head mounts.

west moved this task from Report Issues Here to Beta on the Redgum board.Jun 11 2019, 7:07 AM
west added a comment.Jun 11 2019, 9:03 AM

@logan do you have a toolhead that was exhibiting this issue?

logan added a comment.Jun 11 2019, 9:11 AM

I have one with a mount that is more squished than the others, but I don't have any more carriages to check it against.

west added a comment.Jun 11 2019, 9:18 AM

I found one over here that doesnt sit flat that I'll tset with

west added a comment.Jun 11 2019, 10:14 AM

@logan The changes made to the x carriage seem to fix the issue, at least with the one sample I printed off. T7685 is the slice request to test more

logan added a comment.Jun 18 2019, 9:21 AM

@west So I grabbed the redgum tool head with the most squished mount we have over here and it doesn't want to sit flat, seems like it is still high-centered on the alignment feature.

west added a comment.EditedJun 18 2019, 9:22 AM

@logan what does the negative feature on the toolhead mount measure?

measured with calipers at layer 1
Image top: 6.7mm
Image bottom left: 5.5mm
Image bottom right: 5.6mm

Model:
Top: 8mm
Bottoms: 6.77mm

west added a comment.Jun 18 2019, 10:46 AM

Dang that is squished, ill make the x carriage towards the low end

@west do you know where we are at with this part? AS-PR0154. I am just looking to get a batch printed in Cluster. Do we have a file we need to test?

adam added a comment.Jun 26 2019, 10:14 AM

@west @logan is this ready for merge to master? No hardware changes associated with this?

logan triaged this task as Normal priority.Jun 28 2019, 12:55 PM

@adam Looks like there are some older versions in there, do we need to clear those out before the merge?

Otherwise the part passed fit test and the correct model and gcode is present. No hardware changes here

adam added a comment.Jun 28 2019, 12:57 PM

All old versions must be cleared out before merging. The cleaner we keep the repo now, the easier the organization that is part of the production tag is going to be.

logan reassigned this task from west to Steven.Jun 28 2019, 1:20 PM
logan moved this task from Beta to Needs Review on the Redgum board.

The old version of the x double bearing holder was here also, I removed that too.

logan added a comment.Jul 2 2019, 1:24 PM

Drop test passed, full report:

Steven reassigned this task from Steven to logan.Jul 5 2019, 7:43 AM
Steven added a subscriber: Steven.

This is merged in master. @logan @adam would you rather me close this after merging or assign back to one of you?

adam added a comment.Jul 5 2019, 7:46 AM

Please assign back to @logan to make sure we have all the ohai updates worked out.

logan moved this task from Needs Review to OHAI Content on the Redgum board.Jul 5 2019, 8:11 AM

This OHAI update will include the new X-Double Bearing and X-Carriage Cover