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Fans prone to getting things in them
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Description

I've noticed that the position of the heatsink fans make them very prone to accidentally sticking a finger or a tool into them while loading or unloading filament or cleaning the hobb or adjusting the idler compression. Maybe pebcak but if I did it, I'd be willing to bet other people will do it too.

Event Timeline

kent created this task.Dec 10 2018, 11:45 AM
kent created this object with edit policy "LulzBot Hardware Products (Project)".
west added a comment.Dec 10 2018, 12:30 PM

This is the case with any heatsink fan. If we covered the fan, it could reduce airflow going to the heatsink and require another printed part that would be cosmetic heavy

kent closed this task as Wontfix.Dec 10 2018, 12:46 PM

This is the case with any heatsink fan. If we covered the fan, it could reduce airflow going to the heatsink and require another printed part that would be cosmetic heavy

@kent we can make a little printed fan guard

kent added a comment.Dec 10 2018, 2:02 PM

@tutley yeah we could. I think there may be a number of designs that are available and freely licenced. I don't see it as something that absolutely needs to happen, but it was something that I noticed so I made a ticket for it, mostly for logging purposes. It's pretty frequent that months and months after the release of a product, someone will point out an issue that was already thought about and determined not to do anything about. In situations like that it might seem like negligence. This way, we can look back and remind ourselves exactly why we decided not to do anything. Not doing anything is a valid thing to do in some cases, including this one I think.

I have hit my fingers in the fans a lot and it doesnt ever cut you or anything, it is mostly just startling. Not sure if we really need to put anything over them but i can see the concern

we have some covers on order

west added a comment.Wed, Dec 26, 12:29 PM

I have the first sample of fan covers in, they will require 4x M3x20 FHCS

DaniAO added a subscriber: DaniAO.Wed, Dec 26, 1:29 PM

@west do we have these on the machine already? Or would this add yet another part to the BoM?

west added a comment.Wed, Dec 26, 2:04 PM

@DaniAO i only have it on quiver 3 to test, nothing has been added to the bom for this

sorry, do we have the M3x20 on the BoM..

west added a comment.Wed, Dec 26, 2:06 PM

I dont think so, it would be a new fastener :/

west added a comment.Thu, Dec 27, 8:21 AM

@Steven requested a printed fan cover to see how it looks compares to the off the shelf ones that

west added a comment.Thu, Dec 27, 11:00 AM

Printed part has been pushed, the fan covers from pelonis are in

mouser cover

pelonis cover

@mcoronado @Hob hat do you think

my two cents- not a fan of the mouser or the printed part. I like the Pelonis and am all for this! While it doesn't hurt, it does give you a nice jolt when you do stick your finger in the fan.

I agree that the Pelonis cover looks better as the matte black matches the rest of the black parts around it better

@west will you believe me if I say yes? lol

west added a comment.Wed, Jan 2, 8:56 AM

The lead time for the pelonis fan cover is ~ 0-2 weeks for up to 1K pcs, but can increase to ~5-6 weeks at larger quantities if new production is needed. Pelonis generally keep this part in stock ~ 1K pcs
@Steven @mcoronado @Hob should we add these to the BoM?

kent added a comment.Thu, Jan 3, 12:16 PM

reviewed and merged

$ git diff master
diff --git a/production_docs/BOM.csv b/production_docs/BOM.csv
index effae13..61dd2c1 100644
--- a/production_docs/BOM.csv
+++ b/production_docs/BOM.csv
@@ -29,6 +29,7 @@ EL-HR0157,"CB Switch to PSU Harness, Assembled",PCE,1,Y
 EL-HR0160,"E1 Extruder Motor Harness, Assembled",PCE,1,Y
 EL-HR0161,"E2 Extruder Motor Harness, Assembled",PCE,1,Y
 EL-HR0164,USB ground,PCE,1,Y
+EL-HR0170,"PFG 40, Fan Finger Guard Plastic, 40mm",PCE,2,
 EL-MS0479,CONN TERM FEMALE 20-24AWG TIN (Micro-Fit 3.0™),PCE,4,Y
 EL-MS0480,CONN TERM MALE 20-24AWG TIN (Micro-Fit 3.0™),PCE,6,Y
 EL-MS0059,Molex-CONN TERM FEMALE 22-24AWG TIN Reels of 20K,PCE,2,Y
@@ -45,7 +46,6 @@ HD-BL0023,866-2P-06 POWERHOUSE™ BELT,PCE,2,Y
 HD-BL0028,956-2P-06 POWERHOUSE BELT,PCE,1,Y
 HD-BT0043,"Metric Class 12.9 Socket Head Cap Screw, Alloy Steel, M3 Thread, 35MM Length, 0.50MM Pitch",,,
 HD-BT0012,M3 Set Screw (Grub Screw),PCE,8,Y
-HD-BT0039,"Metric Class 12.9 Socket Head Cap Screw, Alloy Steel, M3 Thread, 12MM Length, 0.50MM Pitch",PCE,8,Y
 HD-BT0041,"Metric Class 12.9 Socket Head Cap Screw Alloy Steel, M3 Thread, 25mm Length, 0.50mm Pitch",PCE,6,Y
 HD-BT0042,"Metric Class 12.9 Socket Head Cap Screw, Alloy Steel, M3 Thread, 30MM Length, 0.50MM Pitch",PCE,3,Y
 HD-BT0049,"Metric Class 12.9 Socket Head Cap Screw, Alloy Steel, M5 thread, 14MM length, 0.80MM pitch",PCE,2,Y
@@ -69,6 +69,7 @@ HD-BT0185,"Black-Oxide Alloy Steel Socket Head Screw M3 x 0.5 mm Thread, 16 mm L
 HD-BT0196,"Black-Oxide Alloy Steel Socket Head Screw M5 x 0.8 mm Thread, 25 mm Long",PCE,2,Y
 HD-BT0197,M4 Thumb Screw for Aero,PCE,2,Y
 HD-BT0202,"M3 x 25 0.5 mm Thread, BHCS, Black-Oxide Alloy Steel",PCE,2,Y
+HD-BT0204,"Black-Oxide Alloy Steel Hex Drive Flat Head Screw M3 x 0.5 mm Thread, 22 mm Long",PCE,8,
 HD-BT0206,"Black-Oxide Alloy Steel Hex Drive Flat Head Screw M3 x 0.5 mm Thread, 25 mm Long",PCE,2,Y
 HD-BT0222,"Blue-Dyed Zinc-Plated Alloy Steel Socket Head Screw M3 x 0.5 mm Thread, 50 mm Long",PCE,1,Y
 HD-BT0223,"Blue-Dyed Zinc-Plated Alloy Steel Socket Head Screw M3 x 0.5 mm Thread, 16 mm Long",PCE,2,Y
kent closed this task as Resolved.Thu, Jan 3, 12:16 PM