2.6 E3D-V6 Hot-end & Bowden Tube Assembly

Assembly instructions can be found here: http://wiki.e3d-online.com/wiki/E3D-v6_Assembly

The Stock V3 Hot-end breakdown is as follows:

A) Heat-sink: Modified E3D-V6.

• The J-Head and the fins are the same as E3D-V6, however the thread for the heat-break is M6, not M7.

B) Heat-block: Modified E3D-V5.

• Different dimensions. An E3D-V5 heat-block may not function properly, thermal-wise.

C) Heat-break: Modified E3D-V5.

• Longer by 1mm.
• Actually for 3mm filament, fited with 3mm OD, 2mm ID PTFE liner (PTFE: Poly-TetraFluoro-Ethylene, known as Teflon).

D) Nozzle: Modified MK7.

• The nozzle is not from the E3D family.
  
  Figure 1: TEVO Black Widow Stock Extruder and Stock V3 Hot-end
  
  It is recommend for anyone who has one of it’s components faulty, to do the following:
  
  
  1. Get replacement parts from TEVO. Getting replacement parts from other vendors would be extremely difficult, if not impossible on one hand, and trying to use the originals/clones won’t work, as most probably they won’t fit, or not work properly thermal-wise.
  2. Replace the TEVO Stock-V3 with either a genuine E3D-V6, or a good clone, as depicted in the following Figures 3 & 4.
  
  
  Figure #2: TEVO Black Widow Stock-v3 Hotend Cross-Section
  
  One of the most common errors, when assembling the hot-end, which is the #1 cause for leaks and clogs, is the way the nozzle is assembled with relations to the heat-block and heat-break.
  
  The nozzle must be locked to the heat-break, not the heat-block, as depicted in Figure 2 above.
  
  When locking the nozzle to the heat-block, a gap is formed between the nozzle and the heat-break. (The gap is exaggerated in the figure, to enhance readability) This gap will let the high-pressure molten filament to flow between the threads, and will start leaking at the top of the heat-block. In some cases,depending on manufacturing tolerances, it may leak from the bottom of the heat-block as well.
  
  If the gap is large enough, the rapid temperature changes during retractions, will eventually cause it to clog.
  
  Figure 3: TEVO Black Widow with Stock Extruder and E3D-V6 Hot-end
  
  Figure 4: E3D-V6 Hot-end Cross-Section Views