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Need drawing for heat break and heat sink
Closed, WontfixPublic


We need a drawing for the heat break to send to a new supplier.


Event Timeline

kent created this task.Dec 21 2018, 8:47 AM
kent triaged this task as Normal priority.
kent created this object with edit policy "LulzBot Hardware Products (Project)".
kent added a comment.Dec 21 2018, 3:03 PM

Ok here is the drawing I made for the break:

@samantha when you get a chance, could you please review this drawing?

rev should be IR (initial revision) and not A
angles for V groove

@kent - is this good to send for quote yet?

kent added a comment.Jan 8 2019, 7:33 AM

No I don't think so @jessica

kent added a comment.Jan 8 2019, 7:57 AM

I incorporated @samantha feedback on the break and pushed a new version. Here is a pdf with the incorporated changes:

The heatsink drawing is still outstanding, there is a pdf here but it was drawn a while ago and I don't see the fcstd file in that same dir.

@kent changes look good

@samantha - can you please point me to the step file for the MP0112... I see one but its pretty old and I am unsure if it is correct or not.

@kent can I use the heatsink drawing or are you re-drawing?

kent added a comment.Jan 8 2019, 3:42 PM

@jessica I just finished re-drawing it, there were a few errors on the drawing I posted.

@samantha, here is a pdf of the drawing I made for the heat break and you please review it when you have a chance?

thank you both so so much!

@kent what file did you base the heat break drawing on?

@kent PP-MP0113 feedback:
The A datum is a theoretical axis that is not based on anything physical, with everything related to it being measured off of it. This prevents it from being able to be used in any actual measurements. A physical feature will need to be selected as the A datum to generate that axis from.

The stack up of hole information in the upper left can be confusing. I recommend starting with the first hole size you would come to from that view (the M6 ↧4.7) then proceed through as you encounter each new hole. Also, the chamfer should be on a combined line with the diameter it is connected to (in this case the Ø4) to make it clear where in the stackup it belongs.

It looks like everything else is probably good.

@jessica I pushed a step file for the heat break to the branch for this ticket under taz-olive, exported from Kent's file

step file for heat sink also pushed now

kent added a comment.Jan 16 2019, 12:22 PM

@samantha I incorporated those changes and pushed it to the branch can you review the drawing again?

DaniAO added a subscriber: DaniAO.Jan 18 2019, 8:25 AM

@kent Where are we on this drawing? This is needed ASAP!

DaniAO raised the priority of this task from Normal to Unbreak Now!.Jan 18 2019, 8:29 AM
kent added a comment.Jan 18 2019, 12:00 PM

Just talked with Patrick from Quattro and scrubbed the hexagon source with 6dc8aade581f96deda5ba25e90d00b9499552ae0 and added a couple more things to the sink and break. It needs to be reviewed and merged into master. In this case I just straight reverse engineered the existing design, but there are some major DFM questions.. For example, there is a piece of hardware that needs to go into the top of the heatsink that we don't need or use, so do we need the additional cost of processing? The heat break is going to be difficult to get quoted, since it requires a laser welding process that most of our usual suppliers don't have equipment for. Last thing is the tolerances required to get the fit between the break and the sink right are super tight and this will drive up the cost of these parts, both in terms of price and the cost of the difficulty of maintaining a reliable supply of parts.

kent removed kent as the assignee of this task.Apr 1 2019, 1:01 PM
Steven added a subscriber: adam.Apr 2 2019, 9:39 AM

@adam is this still needed? If not we can close this one out.

Steven claimed this task.Apr 2 2019, 9:43 AM
adam added a comment.Apr 2 2019, 9:46 AM

@Steven I think we can close this. We are fully discontinuing these parts and will have enough coming in to cover the transition. Our T&Cs allow us to upgrade for a fix/RMA as necessary so we don't have to worry about getting in one-off parts.

Steven closed this task as Wontfix.Apr 9 2019, 8:54 AM