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Tightening LCD bows LCD board
Closed, WontfixPublic


I noticed a bow in the LCD board while installing LCD screens. Occurs when fasteners are tightened.

Event Timeline

logan created this task.Nov 30 2018, 7:29 AM
logan created this object with edit policy "LulzBot Hardware Products (Project)".

@logan you saw this when installing the board to the board mount? or the entire LCD assembly into the chassis?

logan added a comment.Nov 30 2018, 7:49 AM

@tutley The latter; LCD assembly into chassis

logan added a comment.Nov 30 2018, 8:16 AM

@tutley Maybe a bit of both actually now that I'm installing another

I looked at the bow l@ogan was describing here. The bow here is pretty minimal and i dont suspect we will run into any issues with this one.

if need be we can easily adjust the LCD board mount to help alleviate this

logan assigned this task to Steven.Dec 4 2018, 2:24 PM

I agree, the bow in this case is much more minor, likely acceptable.
@Steven would you agree with a "Wontfix" conclusion to this ticket?

Steven added a comment.Dec 4 2018, 4:25 PM

Can we please get @mjpelletier eyes on this to get feedback before we close this out?

Steven reassigned this task from Steven to mjpelletier.Dec 4 2018, 4:25 PM

I took a look at an LCD assembly and the CLCD PCB assembly. The pins of the speaker on the CLCD board are slightly longer than the height of the standoffs, causing the board to bow when installed on the plastic LCD Back piece. A possible fix would be to add an indentation on the LCD Back at the point where the CLCD board speaker pins are located. Another possible fix would be to lengthen the standoffs on the LCD Back by 1mm to accommodate the length of the speaker pins.

Never mind. I was looking at an older LCD assembly. The standoff length on the newer LCD Back piece now accommodates the long speaker pins. The bowing on the new assemblies is very minimal but may be caused by either the LCD Back plastic piece bowing when installed or the brass M3 inserts not being exactly perpendicular. As long as the bowing is minimal, it should not cause any problems. If, however, the bowing is excessive, the plastic parts of the LCD assembly should be examined and replaced, if needed.

west closed this task as Wontfix.Dec 10 2018, 7:22 AM

this can be reopened if excessive bowing