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logan (Logan Ferguson)
Mfg. Engineering Tech I

Projects (9)

User Details

User Since
Feb 4 2017, 5:27 PM (132 w, 2 d)

Recent Activity

Today

logan added a comment to T9470: Increased X Carriage drag w/ rear tool head mounting fastener tightened.

@west Do you think we could do with a 3in*lbs torque spec vs 5in*lbs?

Tue, Aug 20, 11:05 AM · Redgum
logan added a comment to T8843: bad Z seam in calibration print.

My thought process is that there isn't a big ol gap in the model, so we should be able to print it without one.
Have you tried a different wall printing order? I think those would both be treated as outer walls.

Tue, Aug 20, 10:46 AM · Redgum
logan closed T7964: Insert jigs - redgum specific as Resolved.

@david.hall Since I haven't had any requests and we've moved past the development stage I'm going to go ahead and close this ticket. If anything arises please feel free to open a new ticket.

Tue, Aug 20, 10:44 AM · Redgum
logan added a comment to T8843: bad Z seam in calibration print.

No I haven't been working on it, I already tried everything I could think of

Tue, Aug 20, 10:11 AM · Redgum

Yesterday

logan closed T9664: LCD Center holes do not line up with lcd board controller as Resolved.

The updated gcodes are present on T8953 and will be included in that merge

Mon, Aug 19, 10:36 AM · kangaroo-paw
logan committed rTAZREDGUMf56e62f7e022: Add Y Bearing Holder v1.3.1 models and test gcode T7800 (authored by logan).
Add Y Bearing Holder v1.3.1 models and test gcode T7800
Mon, Aug 19, 10:22 AM
logan committed rTAZQUIVER0c69b0248ac9: Add test gcode for AS-PR0121 Y Bearing Holder v1.3.1 T7800 (authored by logan).
Add test gcode for AS-PR0121 Y Bearing Holder v1.3.1 T7800
Mon, Aug 19, 10:20 AM
logan added a comment to T9470: Increased X Carriage drag w/ rear tool head mounting fastener tightened.

@west any ideas? I don't have any ideas as far as what the cause might be or how to solve this one.

Mon, Aug 19, 8:53 AM · Redgum

Thu, Aug 15

logan added a comment to T9470: Increased X Carriage drag w/ rear tool head mounting fastener tightened.

Talked to Rob at Final this morning and they've had 1 or 2 of these appear at final but were able to fix it with adjustments, so I was told these shouldn't be reaching calibration anymore.
@robert how has this been for you since Tuesday?

Thu, Aug 15, 3:26 PM · Redgum
logan added a comment to T9664: LCD Center holes do not line up with lcd board controller.

These gcodes are being pushed to T8953 branch so that only one branch need be merged later. Sending prints to cluster now, should know by tomorrow.

Thu, Aug 15, 2:18 PM · kangaroo-paw
logan committed R231:f5ffc7270084: Updated X/Y steps/mm to 100.6 per T9664 T8953 (authored by logan).
Updated X/Y steps/mm to 100.6 per T9664 T8953
Thu, Aug 15, 2:17 PM
logan committed R231:3a85953e5bc3: Updated X/Y steps/mm to 100.6 per T9664 also updated step file with v1.4 T8953 (authored by logan).
Updated X/Y steps/mm to 100.6 per T9664 also updated step file with v1.4 T8953
Thu, Aug 15, 2:12 PM
logan closed T9614: Packaging OHAI Images as Resolved.

This has been updated here: https://ohai.lulzbot.com/project/packaging-taz-workhorse/taz-workhorse/
I have packagers looking it over for feedback now but this was developed with them so I don't expect many issues.

Thu, Aug 15, 1:14 PM · Redgum
logan added a comment to T7654: Under extrusion from toolhead?.

@zachah that looks great!

Thu, Aug 15, 8:23 AM · Quiver

Wed, Aug 14

logan added a comment to T9628: External bed harness failed.

It looks better than the video I posted, and is the simplest potential solution.

Wed, Aug 14, 11:03 AM · Redgum
logan added a comment to T9664: LCD Center holes do not line up with lcd board controller.

@bigmansas Don't worry about this one, @oliver and I are working on it. But there's some history here and I can give you the rundown on the solution so you're aware for the future.

Wed, Aug 14, 9:40 AM · kangaroo-paw
logan updated subscribers of T9472: Part number was not created for M2.5x14mm screw.
Wed, Aug 14, 8:26 AM · kangaroo-paw
logan added a comment to T9472: Part number was not created for M2.5x14mm screw.

@DaniAO @oliver Is this part number present on the EBOM? Then I think this would be ready to close

Wed, Aug 14, 8:26 AM · kangaroo-paw
logan placed T9472: Part number was not created for M2.5x14mm screw up for grabs.
Wed, Aug 14, 8:25 AM · kangaroo-paw
logan updated subscribers of T9475: Missing pdf for PC-AS0041.

@adam Do we need a CO for something so simple that should probably have already been there? This seems more like a quick correction than something we should submit a CO for IMO.

Wed, Aug 14, 8:21 AM · Redgum
logan renamed T9574: trouble reading SD cards/LCD lockup from trouble reading SD cards to trouble reading SD cards/LCD lockup.
Wed, Aug 14, 8:10 AM · Redgum

Tue, Aug 13

logan added a comment to T9574: trouble reading SD cards/LCD lockup.

@TyTh So is that ticket an inability to read the SD card, or the LCD actually freezing? I don't see anything about the LCD freezing.

Tue, Aug 13, 2:56 PM · Redgum
logan added a comment to T9470: Increased X Carriage drag w/ rear tool head mounting fastener tightened.

Working on this with @robert today we found a machine that had a drag of ~15N with the rear tool head mount fastener loose, and ~22N with the fastener torqued to spec. We ran the octogear on this machine and it failed circular dimension accuracy. @robert then increased X-Belt tension to the high end of the specified range and the resulting print passed circular dimension accuracy.
So in this case 22-25N is acceptable if the belt tension is increased towards the high end of the spec.

Tue, Aug 13, 2:49 PM · Redgum
logan added a comment to T9628: External bed harness failed.

That catching on the bottom rear extrusion was reported in T7791 also

Tue, Aug 13, 2:06 PM · Redgum
logan renamed T9574: trouble reading SD cards/LCD lockup from TAZ Workhorse LCD Freezes when Printing from SD Card to trouble reading SD cards.
Tue, Aug 13, 2:02 PM · Redgum
logan added a comment to T9574: trouble reading SD cards/LCD lockup.

Hm I don't see anything in this ticket that matches the title.

Tue, Aug 13, 2:01 PM · Redgum
logan added a comment to T9628: External bed harness failed.

@bigmansas was wondering, what if we zip tied the 2 harnesses together maybe 2-3 inches behind the Y Cable Mount? On his unit anyway, only the one harness is drooping. Do you think that might help?

Tue, Aug 13, 1:08 PM · Redgum
logan updated subscribers of T9470: Increased X Carriage drag w/ rear tool head mounting fastener tightened.

I have not been able to get my hands on a unit exhibiting this issue, but I have gathered feedback from calibrators and final assemblers regarding what they are doing to fix it.
Rob at Final said that he has seen this, and when he does he removes the tool head and adjusts bushing compression and spacing. This morning he said that it happens most often when the front 2 button head fasteners (spacing between upper and lower) are not torqued to spec or otherwise left loose.
Feedback from calibrators (@paulette @robert @gregh @duncan) was that they are able to fix it by adjusting the compression hardware and spacing as well, just that it is time consuming for them.

Tue, Aug 13, 11:45 AM · Redgum
logan added a comment to T9628: External bed harness failed.

Would moving that face back make the bend at home even sharper? How will this prevent the cable from drooping into the frame as shown in the video?

Tue, Aug 13, 11:35 AM · Redgum
logan renamed T9470: Increased X Carriage drag w/ rear tool head mounting fastener tightened from As soon as you tighten the M3x50 for mounting tool head, X carriage gets really tight to Increased X Carriage drag w/ rear tool head mounting fastener tightened.
Tue, Aug 13, 11:28 AM · Redgum
logan added a comment to T9628: External bed harness failed.

@adam it is possible that these could fail in the field. We've taken a video that shows how this cable may have been damaged. However the cable in the video is the bed harness not the bed power harness. The bed power harness in the video is the new replacement.

Tue, Aug 13, 11:24 AM · Redgum
logan added a comment to T9628: External bed harness failed.

Pulling back the braided loom, there is a prominent kink and/or bulge. I believe this location on the harness was right at the rear of the Y Cable Mount, due to the length of the braided loom on this harness.


Tue, Aug 13, 10:24 AM · Redgum
logan added a comment to T9628: External bed harness failed.

Here is a pic of the curve of it once removed

Tue, Aug 13, 8:29 AM · Redgum
logan updated subscribers of T9628: External bed harness failed.

The external bed harness was the failure here. One line reads open loop once removed, on the machine it was giving us odd readings.

Tue, Aug 13, 8:28 AM · Redgum

Mon, Aug 12

logan added a comment to T9614: Packaging OHAI Images.

@eBeardslee the process is very similar to TAZ Pro. Assuming they wont have strapping, as long as they get the printer/foam in the box they'll be fine.

Mon, Aug 12, 9:10 AM · Redgum
logan added a comment to T9614: Packaging OHAI Images.

Haven't taken any photos yet. I'll try to get this going

Mon, Aug 12, 9:08 AM · Redgum

Fri, Aug 9

logan added a comment to T8921: Source Files - Dual v3 Adapter Kit.

@karrad I cant think of anything else that should be there, looks good to me.

Fri, Aug 9, 2:11 PM · Retail Parts

Thu, Aug 8

logan committed rTAZQUIVERb6bc188579b6: Add spacer for setting X-Carriage bushing compression T9548 (authored by logan).
Add spacer for setting X-Carriage bushing compression T9548
Thu, Aug 8, 12:47 PM
logan committed rTAZREDGUM286ccb1b7e1d: Add spacer jig for setting X-Carriage bushing compression T9548 T9471 (authored by logan).
Add spacer jig for setting X-Carriage bushing compression T9548 T9471
Thu, Aug 8, 12:45 PM
logan added a comment to T9257: Heatsink Fan wiring coming loose.

If they're worse than the ones we've seen I can see that being possible, but not likely at the bend photographed. I understand the concerns, I just want the best possible solution all around; customers, assemblers, tech support, repair techs should all be considered.
I know to do it best would require a rev of the RAMBo which isn't anywhere near painless financially.
Some testing may be required but this decision is looking to be above my position, I'd like some input from @Steven and @cmerot regarding which option we should pursue/test.

Thu, Aug 8, 11:23 AM · Redgum
logan updated subscribers of T9257: Heatsink Fan wiring coming loose.
Thu, Aug 8, 10:59 AM · Redgum
logan added a comment to T9257: Heatsink Fan wiring coming loose.

How easily could it be removed in the event of rework? Would customers replacing a RAMBo need a new E1 harness every time?

Thu, Aug 8, 10:47 AM · Redgum
logan added a comment to T9257: Heatsink Fan wiring coming loose.

Looking at it, its basically superglue and a curing accelerant right?

Thu, Aug 8, 10:46 AM · Redgum
logan added a comment to T9257: Heatsink Fan wiring coming loose.

@tutley I understand your concern, but if you push it all the way down can you still connect a populated 2 pin connector to it?
We bend electrical connections elsewhere like endstop switches, is the slight bend here of that much concern? Its not like it will be bending back and forth.

Thu, Aug 8, 10:31 AM · Redgum
logan added a comment to T9257: Heatsink Fan wiring coming loose.

Hm, I didn't think there'd be that much variance between PCBs. That isn't the case on the ones I've tried here. How bad of a bend are we talking about? Is it enough to cause concern?

Thu, Aug 8, 10:01 AM · Redgum
logan added a comment to T9257: Heatsink Fan wiring coming loose.

Which option thats been presented here would our customers appreciate more?
Hot glue and super glue reminds me of TAZ 5 CB Assembly, and is something I personally would not be appreciative of as a customer, just as much as it falling off in the first place.

Thu, Aug 8, 9:59 AM · Redgum
logan added a comment to T9257: Heatsink Fan wiring coming loose.

@tutley I didn't see that on the one that I applied. A populated connector connected to it without issue.

Thu, Aug 8, 9:52 AM · Redgum
logan added a comment to T9257: Heatsink Fan wiring coming loose.

Its possible, but I don't know how to confirm that. It may be that the zip tie is just insufficient in accomplishing the original intent.

Thu, Aug 8, 9:50 AM · Redgum
logan moved T9471: x-carriage cracking before reaching min drag from Report Issues Here to Change Order on the Redgum board.

CO Submitted: T9548
I will be training assemblers in Presub and implementing this today due to the current process in place not working correctly. This will save parts and allow us to keep moving.

Thu, Aug 8, 9:32 AM · Redgum
logan reassigned T9257: Heatsink Fan wiring coming loose from nathan to mjpelletier.

Looks like the zip tie here might not be working as well as expected through shipping vibrations, though it did pass a drop test.

Thu, Aug 8, 8:43 AM · Redgum
logan added a comment to T9471: x-carriage cracking before reaching min drag.

I made a jig that will make this process rather quick and it works well. The bushing is held firmly in the printed part with the gap set to 1.6mm.
Place ring of jig on middle finger


Grab part, place jig over compression fastener and tighten until it grabs the jig with some resistance

Pull jig out of part

All set

Thu, Aug 8, 8:28 AM · Redgum

Wed, Aug 7

logan committed rCLUSTERTEST656c0c0b677c: Adds production gcode for PP-GP0451 Syringe Pump Mount T9463 T8953 (authored by logan).
Adds production gcode for PP-GP0451 Syringe Pump Mount T9463 T8953
Wed, Aug 7, 4:05 PM
logan committed R231:4370b0e76f22: Updates production slice for PP-GP0451 Syringe Pump Mount v2.2 T9463 T8953 (authored by logan).
Updates production slice for PP-GP0451 Syringe Pump Mount v2.2 T9463 T8953
Wed, Aug 7, 1:55 PM
logan committed R231:75699a161c5e: Add slots to first layer of PP-GP0451 Syringe pump mount v2.2 T8953 T9463 (authored by logan).
Add slots to first layer of PP-GP0451 Syringe pump mount v2.2 T8953 T9463
Wed, Aug 7, 10:24 AM
logan triaged T9471: x-carriage cracking before reaching min drag as Normal priority.
Wed, Aug 7, 9:10 AM · Redgum

Tue, Aug 6

logan added a comment to T8218: E2 nozzle misses top of calibration cube during auto cal.

@DaniAO I thought it had been made but couldn't find it so I made T9468

Tue, Aug 6, 3:52 PM · Quiver
logan triaged T9468: nozzle wipe x position inconsistent between methods as Normal priority.
Tue, Aug 6, 3:52 PM · Quiver
logan committed rRTLPRTS46ef6b5adc91: Remove TEST prefix from production gcode for PP-GP0450 Dual v3 adaptor T8921 (authored by logan).
Remove TEST prefix from production gcode for PP-GP0450 Dual v3 adaptor T8921
Tue, Aug 6, 3:37 PM
logan committed rCLUSTERTEST8a0d910ec43b: Updates production slice for PP-GP0450 dual v3 adaptor T8364 T8921 (authored by logan).
Updates production slice for PP-GP0450 dual v3 adaptor T8364 T8921
Tue, Aug 6, 3:35 PM
logan changed the edit policy for T9466: remove TEST prefix from dual v3 adaptor gcode.
Tue, Aug 6, 2:24 PM · Redgum
logan triaged T9463: thicken left side of syringe pump mount as Normal priority.
Tue, Aug 6, 1:01 PM · kangaroo-paw
logan added a comment to T9028: Y-motor ground getting caught in foam on production floor..

@adam I know we spoke with preferred already, is there a change order for this?

Tue, Aug 6, 11:57 AM · Redgum
logan updated subscribers of T9371: Bed Heater External wire length for zip tie at calibration.

@draubach Lets go ahead and say anything over 425mm is usable.
Your second question would be best answered by supply chain but a bit more info would be helpful; Are the ones you have from CCX out of spec? How many?

Tue, Aug 6, 11:50 AM · Redgum
logan added a comment to T9374: Start printing corners-LulzBot TAZ PRO/WE ABS+ Enclosure by Printed Solid-KT-MS0014.

@DaniAO anywhere else these should be pushed?

Tue, Aug 6, 11:39 AM · Retail Parts
logan committed rCLUSTERTESTc654dd0aaea2: Add production gcodes for PP-GP0467 PP-GP0468 PP-GP0469 TAZ Pro/WE Enclosure… (authored by logan).
Add production gcodes for PP-GP0467 PP-GP0468 PP-GP0469 TAZ Pro/WE Enclosure…
Tue, Aug 6, 11:38 AM
logan moved T9371: Bed Heater External wire length for zip tie at calibration from Report Issues Here to Change Order on the Redgum board.

For now we will have to rework what we have, any where the loom is shorter than 420-425mm should probably be rejected.
CO T9425

Tue, Aug 6, 11:22 AM · Redgum
logan added a comment to T9371: Bed Heater External wire length for zip tie at calibration.

How much do you think we should lengthen it by? 15mm to be safe?

Tue, Aug 6, 11:08 AM · Redgum
logan added a comment to T9371: Bed Heater External wire length for zip tie at calibration.

It seems to be working out, but may not be ideal. It would be best from our perspective to lengthen the loom by 10mm or more so that they can be tied like the OHAI shows

Tue, Aug 6, 11:02 AM · Redgum
logan added a comment to T9371: Bed Heater External wire length for zip tie at calibration.

@west Yeah that's pretty much whats happening, essentially what I'm doing is stretching the loom some and pushing the wires back so the end of the connectors reach the same point.

Tue, Aug 6, 10:54 AM · Redgum
logan added a comment to T9371: Bed Heater External wire length for zip tie at calibration.

Tue, Aug 6, 10:52 AM · Redgum
logan added a comment to T9371: Bed Heater External wire length for zip tie at calibration.

After re-securing it as described above, here is a 425mm and a 430mm:


Tue, Aug 6, 10:12 AM · Redgum
logan added a comment to T9371: Bed Heater External wire length for zip tie at calibration.

One of the ones I pulled is 425mm

Tue, Aug 6, 9:49 AM · Redgum
logan added a comment to T9371: Bed Heater External wire length for zip tie at calibration.

@west they all look the same as far as I can tell. We haven't removed any yet, but I can. Can you measure some of what they have over there?

Tue, Aug 6, 9:44 AM · Redgum
logan added a comment to T9371: Bed Heater External wire length for zip tie at calibration.

Ah I see what you're saying. @paulette can you try that and see if you can still get the last zip tie on without stressing wires?

Tue, Aug 6, 9:26 AM · Redgum
logan added a comment to T9371: Bed Heater External wire length for zip tie at calibration.

@west as you photographed would not allow the zip tie that goes around those wires per T7987, see last photo of step 4 here: https://ohai.lulzbot.com/project/calibration-taz-workhorse/taz-workhorse/

Tue, Aug 6, 9:19 AM · Redgum
logan added a comment to T9304: Remove label pocket from extruder cap.

CO T9307

Tue, Aug 6, 8:42 AM · Redgum
logan committed rCLUSTERTESTb4beccabb794: Updates production gcode for PP-GP0445 Extruder Cap v2.1 T9304 T9307 T9354 (authored by logan).
Updates production gcode for PP-GP0445 Extruder Cap v2.1 T9304 T9307 T9354
Tue, Aug 6, 8:40 AM
logan closed T9354: Bad seam on Extruder cap as Resolved.

Fixed on T9304 branch

Tue, Aug 6, 8:37 AM · Restricted Project, Redgum
logan committed rTAZREDGUM267542c616b1: Updates production gcode for PP-GP0445 Extruder Cap v2.1 T9304 T9307 T9354 (authored by logan).
Updates production gcode for PP-GP0445 Extruder Cap v2.1 T9304 T9307 T9354
Tue, Aug 6, 8:36 AM
logan added a comment to T8707: extruder harness able to get caught in large print.

@adam This is not updated in the OHAI yet

Tue, Aug 6, 8:11 AM · Redgum

Mon, Aug 5

logan closed T9370: Haimer mount as Invalid.
Mon, Aug 5, 3:25 PM · Restricted Project
logan added a comment to T9246: not wiping deep enough.

Switched to the new wiper mount and double dipped ABS pads and this issue is not present

Mon, Aug 5, 2:11 PM · Redgum
logan claimed T9354: Bad seam on Extruder cap.
Mon, Aug 5, 1:42 PM · Restricted Project, Redgum
logan claimed T9370: Haimer mount.
Mon, Aug 5, 1:39 PM · Restricted Project
logan committed rTAZREDGUMcd698c0170b2: Test fix for bad z seam on extruder cap v2.1 T9304 T9354 (authored by logan).
Test fix for bad z seam on extruder cap v2.1 T9304 T9354
Mon, Aug 5, 1:16 PM
logan reassigned T9256: Remove invalid gcode from production print folders from EricNugent to alexei.
Mon, Aug 5, 1:09 PM · Restricted Project
logan committed rTAZREDGUMf8985af3c384: Remove label pocket from extruder cap T9304 (authored by logan).
Remove label pocket from extruder cap T9304
Mon, Aug 5, 1:07 PM
logan added a comment to T9354: Bad seam on Extruder cap.

@adam I am already started on it, and can continue if you like. Which model version tho? The one on master or the newer one from T9304?

Mon, Aug 5, 12:53 PM · Restricted Project, Redgum
logan added a project to T9354: Bad seam on Extruder cap: Restricted Project.
Mon, Aug 5, 12:51 PM · Restricted Project, Redgum
logan updated subscribers of T9354: Bad seam on Extruder cap.

Possibly, would require some testing. That is pretty typical CuraLE behavior and can't always be corrected, see T8843
I can try to make sure combing is turned off, but outside of that I'm not sure what else to try since CuraLE is pretty bad with Z-seams right now.

Mon, Aug 5, 12:38 PM · Restricted Project, Redgum
logan closed T9278: clunking from left side as Resolved.
Mon, Aug 5, 10:56 AM · Redgum
logan renamed T9278: clunking from left side from clunking from x-motor end to clunking from left side.
Mon, Aug 5, 10:56 AM · Redgum
logan reassigned T9217: X-Motor pulley spacer too large with new X-Motor End from logan to Steven.
Mon, Aug 5, 10:27 AM · Redgum
logan added a comment to T8825: calibration print start gcode M117 msg incorrect.

@Steven if we could sneak T9217 in there that would be great

Mon, Aug 5, 10:20 AM · Redgum
logan added a comment to T9278: clunking from left side.

I'm thinking that may have actually been coming from the Z Left Motor, the print after that was really short in Z dimensionally so I started checking pulleys and found the left one had come loose.
I'll run some more of that same print today and see what happens.

Mon, Aug 5, 8:02 AM · Redgum

Thu, Aug 1

logan added a comment to T8624: ohai never updated with new cal print.

looks good @franklin

Thu, Aug 1, 3:04 PM · Quiver
logan added a comment to T8624: ohai never updated with new cal print.

yay

Thu, Aug 1, 3:01 PM · Quiver
logan reassigned T9257: Heatsink Fan wiring coming loose from logan to nathan.
Thu, Aug 1, 2:39 PM · Redgum
logan updated subscribers of T9246: not wiping deep enough.
Thu, Aug 1, 2:38 PM · Redgum
logan changed the edit policy for T9278: clunking from left side.
Thu, Aug 1, 12:04 PM · Redgum