Page MenuHomeAleph Objects Inc

AOJAS (Justin Stamper)
Quality Control Inspector

User Details

User Since
Mar 5 2018, 7:19 AM (68 w, 2 d)

Recent Activity

Today

AOJAS updated the task description for T8306: Redgum Chassis PP-FP0172 Masking issue.
Wed, Jun 26, 9:58 AM · Workmanship Standard
AOJAS updated subscribers of T8306: Redgum Chassis PP-FP0172 Masking issue.

@tomc

Wed, Jun 26, 9:44 AM · Workmanship Standard
AOJAS added a comment to T8306: Redgum Chassis PP-FP0172 Masking issue.

I'm thinking then that Weiser either didn't really look at these specs or that they didn't communicate them to their powder coat subcontractor. If that's the case then @jperry can try to have them fix this without cost to AO. The only additional cost they may want to(reasonably) charge us for is the additional 8mm diameter masking. I can make an NCMR for these and just follow the regular process for sending stuff back for rework based on this information.

Wed, Jun 26, 9:17 AM · Workmanship Standard
AOJAS triaged T8306: Redgum Chassis PP-FP0172 Masking issue as High priority.
Wed, Jun 26, 7:59 AM · Workmanship Standard

Mon, Jun 24

AOJAS added a comment to T7844: Top rod mounts.

The one on the left is good and the one on the right is the NC part.

Mon, Jun 24, 4:01 PM · Quiver
AOJAS added a comment to T6257: QC to MER/Production Passdown - TAZ Pro, PP-FP0156, Z Upper Top Plate.

NCMR's for this part should be uploaded to this ticket so that there are reference pictures for what has been failed and sent back to the supplier.

Mon, Jun 24, 10:49 AM · Workmanship Standard
AOJAS updated the task description for T6257: QC to MER/Production Passdown - TAZ Pro, PP-FP0156, Z Upper Top Plate.
Mon, Jun 24, 10:36 AM · Workmanship Standard
AOJAS updated the task description for T6257: QC to MER/Production Passdown - TAZ Pro, PP-FP0156, Z Upper Top Plate.
Mon, Jun 24, 10:34 AM · Workmanship Standard
AOJAS updated the task description for T6257: QC to MER/Production Passdown - TAZ Pro, PP-FP0156, Z Upper Top Plate.
Mon, Jun 24, 9:30 AM · Workmanship Standard
AOJAS updated the task description for T6257: QC to MER/Production Passdown - TAZ Pro, PP-FP0156, Z Upper Top Plate.
Mon, Jun 24, 9:29 AM · Workmanship Standard
AOJAS updated the task description for T6257: QC to MER/Production Passdown - TAZ Pro, PP-FP0156, Z Upper Top Plate.
Mon, Jun 24, 9:27 AM · Workmanship Standard
AOJAS added a comment to T7529: PP-MP0205 E3D Aero Steel Pinion Gear - Issue - Set Screw Hole Location.

@jperry
Has the data that Kent created been communicated to E3D?

Mon, Jun 24, 8:41 AM · Yellowfin

Wed, Jun 19

AOJAS added a comment to T6260: QC to MER/Production Passdown - TAZ Pro, PP-MP0216, Bed Mount Plate.

Issues corrected on the last inspection from PO# 29472:

Wed, Jun 19, 12:21 PM · Workmanship Standard

Mon, Jun 10

AOJAS triaged T7716: PP-FP0171 Bed Mount Plate - Manufacturability Design Change Request as Normal priority.
Mon, Jun 10, 12:33 PM · kangaroo-paw

Thu, Jun 6

AOJAS updated subscribers of T7529: PP-MP0205 E3D Aero Steel Pinion Gear - Issue - Set Screw Hole Location.

@Steven
The current plan with MER is to release 20 units to have built out and tested for issues.

Thu, Jun 6, 9:03 AM · Yellowfin
AOJAS added a comment to T6688: Including workmanship standard on all of our drawings.

Notice to accumulate a full set of parts in QC? I don't usually let those parts accumulate, so to get a full set together for a review we'd need to pull them temporarily from backstock, or grab a completed alpha/beta build.

Thu, Jun 6, 8:48 AM · Workmanship Standard

Tue, Jun 4

AOJAS updated subscribers of T6688: Including workmanship standard on all of our drawings.
Tue, Jun 4, 12:04 PM · Workmanship Standard
AOJAS updated subscribers of T6688: Including workmanship standard on all of our drawings.

@karrad
@kent
@Steven
@sherylb
@DaniAO

Tue, Jun 4, 12:00 PM · Workmanship Standard

Fri, May 31

AOJAS added a comment to T6770: Quiver Motor Mounts were not properly drilled.

Which hole was drilled at an angle? The large one for the motor or the hole between the two smooth rod holes?

Fri, May 31, 9:00 AM · Workmanship Standard, Quiver

Thu, May 30

AOJAS added a comment to T7529: PP-MP0205 E3D Aero Steel Pinion Gear - Issue - Set Screw Hole Location.
In T7529#138033, @west wrote:

@AOJAS you are using an aero gear, those are 4mm thick. The yellowfin gear is 6mm thick

Thu, May 30, 1:21 PM · Yellowfin
AOJAS updated the task description for T7529: PP-MP0205 E3D Aero Steel Pinion Gear - Issue - Set Screw Hole Location.
Thu, May 30, 12:26 PM · Yellowfin
AOJAS updated the task description for T7529: PP-MP0205 E3D Aero Steel Pinion Gear - Issue - Set Screw Hole Location.
Thu, May 30, 10:44 AM · Yellowfin
AOJAS updated the task description for T7529: PP-MP0205 E3D Aero Steel Pinion Gear - Issue - Set Screw Hole Location.
Thu, May 30, 10:43 AM · Yellowfin
AOJAS triaged T7529: PP-MP0205 E3D Aero Steel Pinion Gear - Issue - Set Screw Hole Location as High priority.
Thu, May 30, 10:38 AM · Yellowfin

Wed, May 29

AOJAS added a comment to T6258: QC to MER/Production Passdown - TAZ Pro, Multiple Part #s, Aero Idler Levers.

The white paint dots are on the PP-FP0135's.

Wed, May 29, 2:38 PM · Workmanship Standard
AOJAS updated subscribers of T6258: QC to MER/Production Passdown - TAZ Pro, Multiple Part #s, Aero Idler Levers.
Wed, May 29, 1:37 PM · Workmanship Standard
AOJAS added a comment to T6258: QC to MER/Production Passdown - TAZ Pro, Multiple Part #s, Aero Idler Levers.

A recent shipment of the PP-FP0135's had a white paint mark consistently in the same spot( a non-visible area once assembled). It looks like the supplier is adding this mark to differentiate the PP-FP0135 from the PP-FP0162.

Wed, May 29, 1:36 PM · Workmanship Standard
AOJAS added a comment to T7483: Taz 6 Control box PEM nuts crooked.

Oliver and I have talked to PMM about this. They have suggested that the holes should be centered on the flange rather than offset towards the curved side, because their machines have trouble putting the inserts in so close to a curved edge. I told them to submit a redesign to Josh Perry to be approved by R&D to improve the manufacturability of this part.

Wed, May 29, 8:38 AM · TAZ 6

Apr 24 2019

AOJAS added a comment to T6776: EL-HR0141 large cable chains oriented wrong.

Here is an image showing the correct position in regards to our manufacturing process.
In terms of a drawing change, I believe the PC-CN0119 Housing/EL-MS0355 Housing needs to be moved above the EL-MS 0490 Housing/EL-MS0509 Housing.
@west Can you confirm this?

Apr 24 2019, 10:38 AM · Quiver
AOJAS updated subscribers of T6776: EL-HR0141 large cable chains oriented wrong.
Apr 24 2019, 7:59 AM · Quiver
AOJAS added a comment to T6776: EL-HR0141 large cable chains oriented wrong.

I'll make sure @kim gets feedback for Igus.

Apr 24 2019, 7:59 AM · Quiver

Apr 18 2019

AOJAS added a comment to T6688: Including workmanship standard on all of our drawings.

Just as a side note, I know that in terms of prioritization, revamping every part's specification sheet in this manner isn't going to be possible to do all at once due to labor resource constraints. That being said, I would suggest that we focus these specification callouts and clarifications on parts that have consistently been a source of AO production bottlenecks across multiple suppliers. This more limited list of parts would include the bed mount plates(Taz/Mini), Mini bottom plate, electronics case(Mini), and electronics chassis/cover(Taz). This would help resolve the most serious production issues that suppliers have communicated to us.

Apr 18 2019, 2:14 PM · Workmanship Standard
AOJAS added a comment to T6688: Including workmanship standard on all of our drawings.

Surface Condition Callouts, ABCD:
My explanation to Epocs Mfg Inc today regarding the surface condition workmanship standards explained that in general, a back facing area is a C face, a downward surface facing(non visible) or interior facing(non visible) surface is a D face, front and top facing areas are A face, and side facing areas are B. On drawings we submit to them, we need to make sure we utilize all of these in this manner so that our workmanship document supports our specification sheets.

Apr 18 2019, 1:49 PM · Workmanship Standard

Apr 8 2019

AOJAS added a comment to T6501: Foye_First Article Report: PP-FP0149 Electronics chassis HD touchscreen.

Picture 1

Apr 8 2019, 7:42 AM · Restricted Project
AOJAS updated subscribers of T6501: Foye_First Article Report: PP-FP0149 Electronics chassis HD touchscreen.
Apr 8 2019, 7:41 AM · Restricted Project
AOJAS added a comment to T6501: Foye_First Article Report: PP-FP0149 Electronics chassis HD touchscreen.

QC Evaluation:
Dimension Specification: Pass
Cosmetics: Pass, Very good quality. some units had shipping damage, example show on Picture 1. Picture 2 is provided to show the general appearance of the unit.
Cosmetic Notes: The black silkscreen is appears to be thin, causing it to have a more textured appearance than our current products.

Apr 8 2019, 7:39 AM · Restricted Project

Apr 5 2019

AOJAS added a comment to T6498: Foye_First Article Report: PP-FP0150 TAZ Electronics Cover.

Picture 1

Apr 5 2019, 4:29 PM · Restricted Project
AOJAS added a comment to T6498: Foye_First Article Report: PP-FP0150 TAZ Electronics Cover.

QC Evaluation:
Dimension Specification: Pass
Cosmetics: Pass, but needs improving
Cosmetic notes: Silkscreen is appears to be thin, causing it to have a more textured appearance than our cu Some defects apparent on two parts. One unit had powder coat discontinuity(visible on the right edge in the picture)(Picture 1)
Another unit had discontinuity in the texture of the black silkscreened area, I would suggest increasing the thickness of the silkscreen as a potential solution, as that will reduce the visibility of the powder coat surfaces's variation in texture(Picture 3)
Picture 2 is just intended to show the overall appearance of the unit.

Apr 5 2019, 4:28 PM · Restricted Project
AOJAS added a comment to T6499: Foye_First Article Report: PP-FP0153 Interconnect cover.

QC Evaluation:
Dimension Specification: Pass
Cosmetics: Pass, no defects apparent, powder coat appears to match our other suppliers.
@kim : We are good to proceed with the supplier on this part.

Apr 5 2019, 2:22 PM · Restricted Project

Mar 18 2019

AOJAS triaged T6269: QC to MER/Production Passdown - TAZ Pro, PP-MP0227, XY Calibration Cube as Low priority.
Mar 18 2019, 9:13 AM · Workmanship Standard
AOJAS changed the visibility for T6257: QC to MER/Production Passdown - TAZ Pro, PP-FP0156, Z Upper Top Plate.
Mar 18 2019, 8:36 AM · Workmanship Standard

Mar 15 2019

AOJAS triaged T6258: QC to MER/Production Passdown - TAZ Pro, Multiple Part #s, Aero Idler Levers as Low priority.
Mar 15 2019, 3:50 PM · Workmanship Standard
AOJAS triaged T6260: QC to MER/Production Passdown - TAZ Pro, PP-MP0216, Bed Mount Plate as Low priority.
Mar 15 2019, 3:16 PM · Workmanship Standard
AOJAS updated the task description for T6256: (Template) QC to MER/Production Passdown - Retail Product, Part #, Name/Description.
Mar 15 2019, 2:42 PM · Workmanship Standard
AOJAS renamed T6256: (Template) QC to MER/Production Passdown - Retail Product, Part #, Name/Description from QC to MER/Production Passdown to (Template) QC to MER/Production Passdown - Retail Product, Part #, Name/Description.
Mar 15 2019, 2:41 PM · Workmanship Standard
AOJAS renamed T6256: (Template) QC to MER/Production Passdown - Retail Product, Part #, Name/Description from QC to MER/Production Passdown to QC to MER/Production Passdown .
Mar 15 2019, 2:40 PM · Workmanship Standard
AOJAS created T6258: QC to MER/Production Passdown - TAZ Pro, Multiple Part #s, Aero Idler Levers.
Mar 15 2019, 2:39 PM · Workmanship Standard
AOJAS updated the task description for T6257: QC to MER/Production Passdown - TAZ Pro, PP-FP0156, Z Upper Top Plate.
Mar 15 2019, 2:36 PM · Workmanship Standard
AOJAS updated the task description for T6257: QC to MER/Production Passdown - TAZ Pro, PP-FP0156, Z Upper Top Plate.
Mar 15 2019, 2:36 PM · Workmanship Standard
AOJAS triaged T6257: QC to MER/Production Passdown - TAZ Pro, PP-FP0156, Z Upper Top Plate as Low priority.
Mar 15 2019, 2:34 PM · Workmanship Standard
AOJAS updated the task description for T6256: (Template) QC to MER/Production Passdown - Retail Product, Part #, Name/Description.
Mar 15 2019, 2:01 PM · Workmanship Standard
AOJAS updated the task description for T6256: (Template) QC to MER/Production Passdown - Retail Product, Part #, Name/Description.
Mar 15 2019, 2:01 PM · Workmanship Standard
AOJAS added a comment to T6256: (Template) QC to MER/Production Passdown - Retail Product, Part #, Name/Description.
Mar 15 2019, 1:58 PM · Workmanship Standard
AOJAS added a comment to T6256: (Template) QC to MER/Production Passdown - Retail Product, Part #, Name/Description.

TAZ Pro
PP-FP0135, Mirrored Aero Idler Lever
PP-FP0162, Standard Aero Idler Lever
Our supplier for this part, E3D, appears to have accidentally mixed some PP-FP0162's into bags of PP-FP0135's. Inspecting one bag of 500 PP-FP0135's, we found one PP-FP0162 mixed in.
It has been reported by MER that another bag also had this issue.
Due to this issue, and also the parts being nearly identical and easily mixed up on the assembly line, assemblers will need to know how to differentiate between the two.
Refer to the photos to see the difference between the pin that holds the bearing in place. The end of the pin is being referred to as a "Nub" in the photos.

Mar 15 2019, 1:48 PM · Workmanship Standard
AOJAS triaged T6256: (Template) QC to MER/Production Passdown - Retail Product, Part #, Name/Description as Low priority.
Mar 15 2019, 1:43 PM · Workmanship Standard

Feb 25 2019

AOJAS updated the task description for T5847: Source Quiver issue - Hot Ends.
Feb 25 2019, 9:34 AM · Quiver
AOJAS updated the task description for T5847: Source Quiver issue - Hot Ends.
Feb 25 2019, 9:33 AM · Quiver
AOJAS updated the task description for T5847: Source Quiver issue - Hot Ends.
Feb 25 2019, 9:32 AM · Quiver
AOJAS triaged T5847: Source Quiver issue - Hot Ends as Normal priority.
Feb 25 2019, 9:29 AM · Quiver
AOJAS triaged T5846: Source Quiver issue - Hot Ends as Normal priority.
Feb 25 2019, 9:29 AM · Quiver

Jan 29 2019

AOJAS added a comment to T5143: Update chassis drawing and model to reflect requested changed by vendor.

First Article report. Dimension issues are noted in the Notes section on the first page.

Jan 29 2019, 1:10 PM · Quiver

Jan 25 2019

AOJAS added a comment to T5143: Update chassis drawing and model to reflect requested changed by vendor.

Something I hadn't yet mentioned, there are artifacts from RevF on page two, the dimensions I've numbered as 4 and 5 on this spec are leftover from the previous flange folding method, and no longer post-PMM manufacturability revision. To avoid confusion, it should be removed.

Jan 25 2019, 8:20 AM · Quiver

Jan 24 2019

AOJAS added a comment to T5143: Update chassis drawing and model to reflect requested changed by vendor.

Once I have the FA report done, we should have a complete list of features on the specification sheet requiring revision. Should be done by Tuesday at the latest. The issues relate to changes made by the supplier and masking callouts primarily, but there may be more, as I have only finalized 3 pages (out of 7 pages).

Jan 24 2019, 4:21 PM · Quiver

Nov 29 2018

AOJAS added a comment to T4504: Create inspection plan.
In T4504#86513, @kent wrote:

One thing we need to make sure to check is that the steel idlers are threaded thru all the way and that the threads are co-helical.

Nov 29 2018, 3:37 PM · Quiver

Nov 16 2018

AOJAS added a comment to T4504: Create inspection plan.

I pretty much just need to run through the BOM with someone who can explain and pull up a spec for any part I am not familiar with.

Nov 16 2018, 2:56 PM · Quiver

Nov 13 2018

AOJAS added a comment to T4455: Bed Plates have too much powder coat in threads.

I do think the extra time and effort constitutes post-processing on our part(for Production). At some stage, each hole has to be dealt with either by the supplier(inserting reuseable silicon plugs like Rapid or PMM), or on our part(extra time and effort with clogged threads).

Nov 13 2018, 2:41 PM · Mini-Hibiscus, TAZ 6
AOJAS added a comment to T4455: Bed Plates have too much powder coat in threads.

I suggest starting the fasteners by hand and doing the first few turns by hand. Using the driver alone is more likely to result in putting the fastener in at an angle, which causes cross-threading. Also, viewing from multiple angles as the first few threads are cleared allows you to make sure it is going in completely straight. This process takes much longer, but I'm not finding it to be very technically challenging. Eventually wrist fatigue will likely happen to whoever is doing this though, because it does take a bit more hand strength to put the fasteners in. In my hand fastening tests, I haven't had any get stuck.

Nov 13 2018, 2:38 PM · Mini-Hibiscus, TAZ 6

Nov 7 2018

AOJAS added a comment to T4437: Drawing for AO-Hex heaterblock is missing dimensions and tolerances.

Some feedback on the chamfer dimension:
I've been rejecting chamfers over 6.64mm, so I think 6.4mm chamfer size limit in the drawing would work well. Specifying it well under 6.64(the highest diameter we know works with the Reprap nozzles) will make inspection much quicker and keep fallout to a minimum. Due to the size variance in Reprap nozzles, 6.4mm as a chamfer diameter limit will hopefully eliminate all nozzle leaks going forward.

Nov 7 2018, 10:37 AM · TAZ 6

Oct 25 2018

AOJAS added a comment to T1854: Sheet metal first articles .

I also just received some new Quattro C&C'd parts that will need FA Reports:
PP-MP0228, Top Rod Mount
PP-MP0229, Back Plate
PP-MP230, Actuator Connector
PP-MP0231, Bottom Plate
PP-MP232, Motor Mount_Ambidextrous

Oct 25 2018, 8:00 AM · Quiver
AOJAS added a comment to T1854: Sheet metal first articles .

There was a sheet metal part that I wasn't aware of that needs to be added to the done list:
PP-FP0156(Precision Metal Mfg.), Z Upper Top Plate.

Oct 25 2018, 7:54 AM · Quiver

Oct 22 2018

AOJAS added a comment to T1854: Sheet metal first articles .

I haven't yet received first article units for the Bed Plates and Chassis. The first articles for the other sheet metal parts are done.

Oct 22 2018, 12:28 PM · Quiver

Aug 24 2018

AOJAS added a comment to T1565: Filament jams.

Concerning red tag E3D hotends from production, we have had a over a dozen red tagged Universal Aeros (AS-HE0025/26) red tagged for stuck filament. There appears to be an dimensional issue with some of the hot ends where the Heatsink entrance to the Heatbreak has a smaller diameter than the heatbreak. This results in the filament becoming stuck when Pre-Sub is trying to pull it out. Letting the hot end heat up over time(with no fan) allows the obstruction to be pushed through. If left to get hot long enough(10 minutes or more at 230), the filament can be pulled out sometimes.

Aug 24 2018, 7:34 AM · Mini-Hibiscus

Jun 12 2018

AOJAS updated subscribers of T2909: Mini 2 Box Variation.
Jun 12 2018, 12:03 PM · Mini-Hibiscus
AOJAS added a comment to T2909: Mini 2 Box Variation.

To date, QC hasn't had any involvement with materials relating to the shipping process or the printer kits. As far as I know, inventory manages damaged or non-conforming shipping material. I know that some MER personnel also do some NCMR's for some Preferred Packaging materials, but I do not know what the trigger is for their involvement. The post-calibration shipping people do QA on the boxes and kits. They red tag any non-conforming materials for Inventory. Once the supplier gets pictures of the issue, they should be able to get back to us with answers regarding how long it will take to resolve the discrepancy in color. If any retailer displays these boxes(as opposed to keeping them in backstock with only a floor model up front), I would advise them in organizing boxes in a way so as to prevent customers easily seeing different boxes side by side.

Jun 12 2018, 12:03 PM · Mini-Hibiscus

May 3 2018

AOJAS added a comment to T1577: Cables behind the x-motor are sometimes dragging on the frame.

Our current corrective action in regard to the Weiser PP-FP0055 is to have units be straightened out before going on the line. Due to the differences in dimensional averages from Rapid and Weiser, it is difficult to ask for corrective action from the suppliers, but I will try to apply some pressure on them by providing them additional feedback on the perimeter values of their lefts, rights, bottoms, and tops, when the opportunity arises. I would like to see more of their units fall closer to the stated dimension, and less towards the extremes of the tolerance. The lead time on any positive outcome from this feedback could be months, or it could be indefinite(they may not take any action). Currently I haven't found any outside of spec for flatness on the Left side, but it may help alleviate production issues to have them straightened. I have trained Chris, Shane, and Luke on how to do this prior to stocking them out. This is not a fix-all unfortunately.

May 3 2018, 1:40 PM · Mini-Hibiscus

Mar 12 2018

AOJAS added a comment to T1966: Inspection criteria for AS-HE0016 and AS-HE0017.
Mar 12 2018, 12:53 PM · Yellowfin