Molex MicroFit 3.0 are my gold standard for general purpose low voltage connectors. I buy from an electronics distributor (Digikey or Mouser) and crimp my own connectors. However, I did find a listing on Amazon for pre-crimped jumper wires and connector housings.
Use an x-acto knife or a $5 PTFE cutter for best results.
You may have luck with a slow (5W) charger according to the comments here.
Your first layer seems inconsistent. What z sensor are you using? Were these printed in quick succession or did the printer have time to cool?
My thinking is this could be due to thermal drift in your homing sensor. First print will be solid, then subsequent prints will have a warmed up sensor resulting in a different z offset. Try minimizing variables by making your preheating consistent. Or just baby step the z-axis during the print start.
New: Motherboard, Heatsink, and PSU
Used: CPU, RAM, GPU, and Case
The majority of components you find on the used market are pulled out of working systems and will be just fine for years to come. I only recommend buying those specific items new so you are guaranteed to get all the accessories that come with them.
The heat lamp did help for the couple parts I was having issues with. I now mostly use a mini trident for most of my ABS printing. The heat lamp only comes out when I need to do a large print on the Voron2.
There was a Nero3D (Canuck Creator) video a while back where he said acrylic is better at insulating than ACM so I went from ACM to acrylic. Plus the smoked translucent acrylic looks better. I bought the ACM from PrintedSolid originally and have since reused it for other projects.
Chamber temps need to be higher for such a long skinny print because it will contract significantly lengthwise. The fun part is that if you get better bed adhesion without higher chamber temps then it could bend the whole bed sheet into a taco temporarily. Try setting your bed at 110C for an hour before printing with the part fan blowing on the center of the bed to help circulate the air.
Do you happen to know what your chamber temperature was? Ideally, you want to be at 60C to minimize stress cracks like that. ABS shrinks as it cools and will rip itself apart depending on the geometry of the part. My large printer needed a fan blowing on the bed to get reliable ABS prints. Well worth it though because ABS is a joy to post-process.
For bed adhesion, I use a small amount of Nano Polymer Adhesive on textured PEI for my ABS prints.
I’ve always wanted to be able to get information about landmarks as I drive. If I drive by something that has a Wikipedia entry my car should offer to read the summary to me. Unfortunately, ChatGPT will probably be saturated with hallucinated information for a fraction of the minor landmarks I inquire about.
You may want to take a look at pressure advance if you haven’t already. Seems to help a lot with retraction on bowden printers.
https://ellis3dp.com/Print-Tuning-Guide/articles/pressure_linear_advance/introduction.html
Just put an automatic fire extinguisher in there to be safe. These are common in apartments without sprinkler systems.
In case anyone is curious, the printer in the picture is 1100x1100x820 mm and costs $50k USD.
https://builder3dprinters.com/us/product/builder-extreme-3000-pro/
https://en.wikipedia.org/wiki/List_of_public_corporations_by_market_capitalization