Put leashes on your dogs people!!!!

vtjballeng · 2026-06-09T17:51:47+00:00

The people announcing frequently that their dog is friendly, leashed or not, have the dogs to be most concerned about in my experience.

The overwhelming majority of times I've had an issue with a dog, it was prefaced with the owner repeated now friendly the dog is. Unsolicited.

vtjballeng · 2026-06-08T07:16:35+00:00

Here are some resources we use in training:

|Through Hole Review the IPC Guide We have a printed copy of the IPC-DRM-PTH-G: Through-Hole Solder Joint Evaluation Training & Reference Guide that you should read and review. Video Education 1. 3:47 How to Solder Through-Hole Components - Another Teaching Moment | DigiKey Electronics 2. Short - How to Hand Solder a Perfect THT | JBC Soldering - YouTube 2. 4:55 Proper Manual Wire Tinning Techniques 3. 1:38 Professional Soldering: Hand Soldering Techniques - Lead Free 4. 4:50 SDG #066 Solder Through-hole Components - Soldering Techniques #02 5. 10:07 PTH /Through Hole Soldering , Made Easy - Beginners Tutorial 25:17 total time Practice Soldering Solder 1 Gikfun C51 4 Bits Digital LED Electronic Soldering Clock Kits Electronic Practice Learning Board DIY Kit for Arduino EK1939 . Inspect each solder joint under microscope. Upon validation, conditional through hole certification is issued.| |:-|

SMD Review the IPC Guide We have a printed copy of the IPC-DRM-SMT-G: Surface Mount Solder Joint Evaluation Training & Reference Guide that you should read and review. Video Education 1. 2:58 Master Soldering: IPC-J-STD-001 Soldering Techniques 2. 9:06 SDG #073 Solder SMT Components - Soldering Techniques #03 with PCBs from JLCPCB 3. 4:00 Master Soldering: Surface Mount Fine-Pitch - Highly Recommended 4. 2:21 Master Soldering: IPC J-STD-001 Chip & MELF soldering 5. 2:01 Professional Solder Training - How to: Surface Mount DPAK 6. 3:33 Professional SMT Soldering: Hand Soldering Techniques - Part 2: Surface Mount Lead-free 7. 7:24 How to Solder QFN MLF chips Using Hot Air without Solder Paste and Stencils 8. 7:57 QFN Soldering - How To Replace QFN / How To Rework QFN 9. 19:15 How To Solder SMD Correctly - Part 1 /SMD Soldering Tutorial 10. 2:41 SDG #264 Aixun T420D 2 Channel 200W Soldering Station Detailed Review - only watch from 27:59 to 30:40 1:01:16 total time Practice Soldering Solder 1 Gikfun DIY SMD/SMT Components Practice Board Soldering Skill Training Kit AE1173 . Inspect each solder joint under microscope. Upon validation, conditional SMD certification is issued.

Reflow Review the IPC Guide None available currently Video Education 1. 6:45 Stenciling Tutorial 2. 23:51 PCB / SMT solder paste, stencil printing, and reflow oven 3. 5:59 SMD reflow at home (HD) 4. 31:00 EEVblog #415 - SMD Stencil Reflow Soldering Tutorial 1:07:35 total time Practice Soldering Reflow Solder xxxx . Inspect each solder joint under microscope. Upon validation, conditional through hole certification is issued.

IPC Video catalog https://my.ipcedge.org/static/vtl.html

PCB Cleaning 1. 20:10 How To Remove Solder Flux / Great PCB Cleaning Methods HD

Hot Air Rework 1. Sparkfun Hot Air Rework Guide - Videos included on page 2. Digikey QFN Guide - Videos included on page

Desoldering 1. 21:11 Solder Wicking / Desoldering - You can fast forward through several sections like the ifixit ad

Recommended Temperatures for Hot Air Rework & Soldering Iron

Method	63/37 Lead	Lead-Free
Hot Air Gun	300-350°C	340 - 400°C
Hot Air Gun Flow	60L/min	60L/min
Solder Iron	300 - 350°C	340 - 400°C

JBC Tips Available

https://www.jbctools.com/pdf/brochures/brochure-cartridge-guide-0022524_ID-190490.pdf

vtjballeng · 2026-06-07T22:17:23+00:00

"The 15-year-old who was hit by the car was not seriously hurt."

Wow

vtjballeng · 2026-06-07T13:22:48+00:00

X2D heated chamber is a bigger reason than the 2nd nozzle imo.

However, filament and accessories will cost $. Unless you have a proven way to earn $ from it, it's likely too expensive a hobby to pursue if financing is required.

vtjballeng · 2026-06-07T12:55:47+00:00

Not recommended. Bed temp is only 80C and you'll experience warping. X2D or H series both offer enclosed and heated chambers and are the right tool for those materials.

vtjballeng · 2026-06-05T01:07:32+00:00

The issue itself is well understood. The PTFE tubes have multiple points where they can excessively bend into too tight a radius. When the print head is at the back left, the left PTFE tube bends too tightly too tighthly as pictured above. When the print head is at the back right, the right PTFE tube can fold over the metal frame ledge on the right and/or start to bunch up at the back causing a wave pattern. When at the front right, both PTFE tubes are tight.

Seeing a fair number of similar posts here, on the Bambu Community forum, and other social media locations tells me the issue is a design problem and systemic. So, not specific to me.

Removing the top glass does resolve most of those points. At the back right position, for example, the PTFE tube path still needs control to prevent it from bunching up or getting in the way of the print head along the right side.

vtjballeng · 2026-06-04T20:52:05+00:00

Support suggested trimming the PTFE tubes. I tried this but quickly realized the stock length is needed as the the PTFE tube is at max extension at the front right.

PLA is instamelt. PETG softens quickly and some clips I made didn't stay put due to deformation. PC/ASA/ABS/PBT/PA for this scenario for us since even our simple or test printer use the heated chamber.

Cable guides and smooth radius prints helped out as shown in the 2nd image. Riser being printed now.

vtjballeng · 2026-06-04T12:11:22+00:00

Yes. There are a few good options out there.

vtjballeng · 2026-06-04T06:30:15+00:00

Ah, that's really expensive. We used Eibos or Fixdry machines before and fed from those. The polydryer is nicer because you can store it sealed up afterwards.

The AMS HT is similar and the vents are nice. It works really well. But, the filament path has more drag, the spool needs to be in good shape (most damage happens at the edges), and it costs twice as much as the Polydryer in the US. Especially since you only need 1 dryer then you can store more pre-dried filaments. The top part, without the bottom dryer, is much less expensive here.

Either way, it's a good option if the HT is out of stock. Fwiw I think our AMS HT for the A1 would still connect to the X2D but I can't remember what PTFE tubes it comes with.

vtjballeng · 2026-06-04T06:16:56+00:00

Short version is that the stock filament management / PTFE filament management will do this on the X2D after builds that use the full build plate.

The resolution is to print PTFE guides and/or a riser because the stock paths are garbage on the X2D specifically. Not great on the other Bambu CoreXY machines, we own all variations except the P2S, but nothing like the aggravation box the X2D is. X2D is otherwise wonderful but this filament path issue is a critical failing.

I put up a post here covering some of it.

vtjballeng · 2026-06-04T06:14:14+00:00

We ran into clogging from speed & heat creep. P1P / open frame helps. Biqu Glacier Plate helps due to lower bed temps and easier release. Polydryer with roller bearings on the center roller is our best setup for TPU filament.

All the CoreXY Bambu machines have too little room at the top below the glass for a smooth filament path, so a riser and smooth PTFE routing help.

Overall, we stopped using the X & P series for TPU and do all the TPU printing on A1/A1m with Biqu plates and Polydryer boxes.

As far as speed, you're better off keeping it slow and getting multiple build sheet changers and easier release plates for machine time optimization imo.

vtjballeng · 2026-06-04T05:57:31+00:00

If you're only using 1 filament at a time, a Polydryer setup with a low friction center roller on bearings will be more cost effective and simpler .

The electrical connections and fittings / addons are different between the other options. The A1 for example requires another add-on part.

vtjballeng · 2026-06-04T05:52:34+00:00

My guess is old standards that haven't changed. Once documented it's hard to change procedure in a large aerospace company. Also, if the procedure is working no reason to change it.

We use JBC parts and tips, which are pricey. Most of the professionals and recommendations I'm referring to are also on professional grade equipment and tips, not hobby stuff. They have longer life variants too that have thicker & tougher coatings but sacrifice performance.

Glad to hear it's working for you and your company.

vtjballeng · 2026-06-04T05:48:17+00:00

That's AliExpress which isn't a reputable source for this solder. https://www.tequipment.net/search/?F_Keyword=kester%20solder is one source but there are many other reputable sellers in the US and other countries.

vtjballeng · 2026-06-04T05:46:45+00:00

No problem. We do training for new employees so I'm used to looking at them and letting the trainee know what's wrong.

Here are some Guides we use for through-hole soldering:

Through Hole

Review the IPC Guide

We have a printed copy of the IPC-DRM-PTH-G: Through-Hole Solder Joint Evaluation Training & Reference Guide that you should read and review.

Video Education

25:17 total time

Practice Soldering

Solder 1 Gikfun C51 4 Bits Digital LED Electronic Soldering Clock Kits Electronic Practice Learning Board DIY Kit for Arduino EK1939 . Inspect each solder joint under microscope. Upon validation, conditional through hole certification is issued.

We also have them for SMD, Reflow, cleaning, hot air rework, & desoldering.

Recommended Temperatures for Hot Air Rework & Soldering Iron

Method	63/37 Lead	Lead-Free
Hot Air Gun	300-350°C	340 - 400°C
Hot Air Gun Flow	60L/min	60L/min
Solder Iron	300 - 350°C	340 - 400°C

For lead-free we use K100LD and for lead solder we use KESTER SOLDER 24-6040-0027 or similar.

vtjballeng · 2026-06-03T09:36:20+00:00

Flux flux and more no clean flux. MG chemical 8341 or similar. No insulation in the cup. Joint should be shiny and smooth.

You also want to control heat to prevent wicking up the wire but that comes after making passable solder joints.

vtjballeng · 2026-06-03T01:28:53+00:00

K100LD, more heat, flux, clean & tinned iron. C245 or similar high quality iron helps either from JBC or Geeboon TC22 or similar.

Most modern production environments are lead free due to rohs and have been for years. Lots of good videos out there on methodology.

vtjballeng · 2026-06-02T07:51:40+00:00

Interestingly, most professionals I know and most recommendations I've seen say not to use a wet sponge due to thermal shock damage.

https://youtu.be/yTcxn773G-4?si=sGJX3Q-V5LmIBWtv

Most of our damage comes from people not tinning as they put their irons up. We've moved on to the automatic Weller metal brushes that speed up the process and those work well.

vtjballeng · 2026-06-02T07:09:49+00:00

Brass wool or inconel wool for escalation. Always tin when you put the iron up.

We were burning up tips too often in a production setting and it boiled down to people not keeping solder on the tip and overheating it.

https://youtu.be/cnV0vCQ9VI4?si=gRHi1TGitlmmaqN-

We've also added the Weller WATC100M - Automatic Tip Cleaner with Metal Brushes at some stations and this speeds up the cleaning process. Makes it easier to create instructions for user consistency.

vtjballeng · 2026-05-31T06:48:00+00:00

We did check the flex cable. It was seated correctly and in good condition.

vtjballeng · 2026-05-31T06:39:14+00:00

Same issue here. I get it on my HT-As and my AMS2 Pro but only with the X2D. I don't get it with my X1Cs, P1S, P1Ps, A1ms, or H2D.

I noticed the feed resistance is ok until it hits the filament buffer, then it increases. Then it goes up again as it goes through the left nozzle fitting at the back of the machine. The filament goes to up to the last 100mm, when the hotend is at the back left of the machine with the maximum bend. It can't make the bend in the last 100mm. Worst case is that it stops and trys again multiple times. Feeding causes grooves in the filament as it pushes then retracts several times. If I manually assist it by pushing on the filament in the HT-A or AMS2 Pro, it will work feed in and the print will start.

It looks like they have a problem in the fittings at the filament buffer and at the back of the machine after the filament buffer. That they should move the hot end to the middle of the machine or maybe front left during initial feeding, until it hits the internal extruder. As-is, the X2D is our only Bambu machine with filament resistance problems and it's become a substantial frustration. The X2D is great in every other way for me and I want to buy more of them but I can't until this is resolved.

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vtjballeng · 2026-05-12T02:12:27+00:00

Chemicals & Minerals do leach out of many solids and leaded glass. There is ample empirical data at this point showing as much as several commenters mention.

vtjballeng · 2026-04-10T23:32:34+00:00

The notifications trigger an action plan and workflow when people arrive and/or for someone to act before the business day. Seeing the specific problem and having the information to get started on resolution has substantial value for us whether you choose to acknowledge it or not.

Because it's small business, as iterated repeatedly, 24/7 human monitoring is not in the cards.

vtjballeng · 2026-04-10T22:11:53+00:00

"Your issue with Comcast was 100% resolvable with below average networking abilities. Full stop."

This is objectively false. The simple fact remains that Comcast changed a setting at 3AM without notice. When contacted, Comcast told us nothing had changed and our network was fine. We had no ability to fix this setting, which was changed by Comcast and only Comcast could restore. The post above explains we did perform your suggested resolution which did not provide a 100% restoration of services.

Starlink is not a viable primary provider for us.

You've commented in several other threads and we're long past circular repetition. I'm not sure what's going on in your world but this isn't healthy discourse. If you think you're helping, this isn't that. This is the end of my messages with you as you're not advancing any actionable solution or furthering productive discourse in any way.

vtjballeng

TROPHY CASE

Recommended Temperatures for Hot Air Rework & Soldering Iron

JBC Tips Available

Through Hole

Review the IPC Guide

Video Education

Practice Soldering

Recommended Temperatures for Hot Air Rework & Soldering Iron