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feed tube gets caught on frame corner
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Description

We had a report from a user that the bend in the bowden tube is causing additional friction and routing issues when feeding filament:

Can we look into packaging the tube differently without winding to avoid this issue?

Event Timeline

karrad created this task.Jul 29 2019, 3:00 PM
karrad created this object with edit policy "LulzBot Hardware Products (Project)".
logan added a comment.Jul 29 2019, 3:08 PM

@karrad They arrive here with a curve already from the reel of tubing, this is then worsened by the curve in the filament coming off of the reel. I'm pretty sure packaging differently would have no affect on the scenario in the above photos.

@logan any other suggestions to alleviate this? This one seems much worse than what we are used to in previous models.

logan added a comment.Jul 29 2019, 3:29 PM

Nothing that comes to mind. This is pretty typical of this setup and one of the reasons many users prefer to move their spools to feed from above.

logan added a comment.Jul 29 2019, 3:34 PM

We could add a guide feature to the Z-Upper Right that would keep it from flopping over the front, like this:


just to throw an idea out there

karrad added a subscriber: TyTh.Jul 29 2019, 4:00 PM

@logan That options scares me just due to the possible packaging changes that may be required.

@TyTh Have you had any other reports of this in the field? As this is so similar to Taz 6 designs, we should have heard it before if it is a widespread issue.

logan added a comment.Jul 30 2019, 8:12 AM

@karrad Just an idea, it would require a packaging change. I did see a comment about it on a FB post regarding the Workhorse.

logan renamed this task from Possiblly package filament guide tube straight to feed tube gets caught on frame corner.Jul 31 2019, 8:42 AM
logan reassigned this task from logan to Steven.
logan added subscribers: west, tutley, logan.

Need some feedback from R&D, I don't think this can be fixed with packaging. @tutley @west

what about flipping the feed tube spinner around so the feed side is toward the back? not sure if it will help but it might

logan added a comment.Jul 31 2019, 9:21 AM

I can try it, but we'd have to communicate that to customers. Maybe in the QSG?

logan reassigned this task from Steven to karrad.Jul 31 2019, 11:33 AM
logan added a subscriber: Steven.

@tutley That actually did help, with the feed tube holder installed as described it doesn't look like it wants to flop over that corner. I loaded a reel of stiff polylite that is nearing the end of the reel to get a scenario as close to the origin of the issue as possible. If I turn the feed tube holder around, it goes right over that corner.



@karrad we'll need to figure out the best way to relay this to customers.

@logan @tutley T9159 will be the fix towards customers.

@TyTh Please get this logged for your team, in case any customer has an issue here is the fix.

karrad reassigned this task from karrad to TyTh.Jul 31 2019, 11:36 AM
logan added a comment.Jul 31 2019, 3:49 PM

Well it at least helped on that one. Installed a different reel and now its flopped over the front. Still able to get pinched at the back when homing too.

tutley added a comment.Aug 1 2019, 7:13 AM

does it help if you flip that one the back the other way?

logan added a comment.Aug 1 2019, 8:16 AM

I guess, sorta

tutley added a comment.Aug 1 2019, 8:20 AM

is this PTFE coming from the end of a reel? This setup is no different from TAZ6

logan added a comment.Aug 1 2019, 8:30 AM

No way to know. Yes I have seen users in the field report this on TAZ 6 also, one of several reasons many ditch this setup in favor of a top feeding spool holder. Which doesn't really jive with our enclosures in the cluster and makes the machine considerably taller, and i'm guessing is the reason we haven't explored that option for production.

logan added a comment.Aug 1 2019, 8:31 AM

The filament put into it has more affect on the curve of the PTFE than anything else, FWIW