Da Vinci Pro Hotend Nozzle Replace with MK8 Heat-throat and V6 J-Head Heater Block

Update 11 Jan 2021:

The Dual Fan Side adapter shown is now posted for download; http://www.thingiverse.com/thing:4686251.

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Update 28 April 2020:

Revised the non-exploded hotend bill of material and assembly the incorrect diameter PTFE tubing specified. Drawings and assembly corrected.

Added additional sources to the spreadsheet for parts necessary to complete the repair.

Disclaimer:

1. XYZ PRINTING - PRODUCERS OF TH DA VINCI LINE OF 3D PRINTERS HAS NOT

APPROVED OR CONSULTED ON THIS MODIFICATION TO THE OEM HOTEND. 2. USE AT YOUR OWN RISK; NO IMPLIED WARRANTY, LIABILITY OR FINANCIAL

RESPONSIBILITY IS ASSUMED BY THE ORIGINATING DESIGNER OF THIS

REPAIR AND/OR RETROFIT.

This is a repair/retrofit of the OEM hotend replacing the heat throat with a MK8 40mm long and a J-Head heat block and nozzle. The number of 3D printed parts is minimal and include a new cooling fan duct, and filament guide to permit easy loading.

The parts needed to complete the retrofit are listed with a known vendor and link at the time of posting.

All design files in native Fusion 360 format, STEP and detailed assembly drawings are also in the download package.

Now with all that out of the way; my experience with this repair is better than I could have hopped, and it is installed in my printer pushing out plastic.

Some very important points based on my experiences:

1. Clean the mating surfaces on the heat-sinks with 70-99% IPA until they are clean.
2. Use the recommended thermal compound or comparable at assembly; I suggest avoiding the white grease compound completely.
3. Too much thermal compound is not better; it just creates a mess and does not conduct heat as well.
4. Do perform an assembly without compound first to become more familiar with what tools or fixtures you will need at the ready.
5. If your only experience is with the OEM nozzle then this will be a new item; put a silicone sock on the heater block. It does wonders for temperature stability when printing all the compatible filaments.
6. Have fun; it might take a bit to dial in your settings, but it will not take long. My first print was the same for a V6 J-Head with some minor tweaks on retraction and run-out distances.

Comments, questions and suggestions are always welcome.

Category: 3D Printer Parts