CR-10 Quick Connect Hotend Installation

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Be sure to check out the Ultimate guide to replace a failed blower or fan.

I’ve been through a bit of hotend drama on my CR-10.  I burned up a couple hotends printing many, many dozens of artillery shells.  I want to keep my printer as stock as possible for as long as possible.  I tried to do it on the cheap but it did not work out.

DISCLAIMER:

I completely understand that there are better hotends and firmware.  However, I am not doing this to build and rebuild my 3D printer, I do my designs on Thingiverse and print them and sell them on eBay and Etsy. I also blog about my fixin’s and recommendations here at Makersteve.com.  I want my printers simple, easy to maintain and to minimize the complexities that come with dramatic system changes.  I do understand that some people like to build, rebuild and improve their 3D printer.  If I offend you by continuing to use a stock hotend, I apologize in advance.  I am sure this will benefit a large group of stock CR-10 users.

A little history,

A couple months back, I purchased some knockoff hotends for the CR-10 off eBay for about $8 a copy.

The look okay in the bag.

IMAG1786.jpg

They don’t pass the sniff test once you take them out.

 

Creality CR-10 hotend on the top.. knockoff on the bottom.

IMAG1789.jpg

Of course they said OEM, Original!  What I found is they do not include the PTFE on the inside of the hotend throat.  They print for a bit, clog up and quit.  The issue seems to be related to retraction.  They also do not have the same quality cotton and kapton tape on the hotend body.  They are now spare parts in the collection of stuff that is Makersteve collection of stuff.

I found the Original MK8 Extruder Hot End kit 0.4mm Nozzle For CR-10 Series 3D Printer on eBay  from Creality-3d-direct, the same place I purchased my used Ender 3s and CR-10S.  Their little store has some good deals.   This hotend has the added feature of providing quick connectors for future hotend replacement.  The kit comes with everything required, PTFE, connectors and a cheap set of narrow nose pliers.

IMAG1749.jpg

Sounds Makersteve Approved so let’s check it out.

Best part: NO SOLDERING

Difficulty: Easy

Time required: 15 minutes/ish

Tools required:

Strippers

Everything else comes in the kit.

Stuff recommended:

Loctite Blue Stick, Medium Strength Threadlocker

PTFE Cutters

To begin:

Now you are ready to get to work.  Start by powering off your control box on the CR-10.  There is a switch in the back or disconnect the main power to be sure.

IMAG1740.jpg

Disconnect your hotend wiring assembly.

IMAG1742.jpg

Now to remove the hotend

IMAG1743

Use an allen wrench to remove the screws securing your fan.  If you have the stock fan housing, the process is the same.  Six screws total, two are longer, they mounted the hotend itself. 4 mount the main fan, 2 mount the blower.

IMAG1744IMAG1745IMAG1746

Press down on the blue PTFE connector and pull out the PTFE tubing.IMAG1747IMAG1748

Take a look at the shipping list and instructions… you won’t need em.IMAG1751

Inventory your kit!IMAG1752

Measure your wires, you’ll be doing some clipping.IMAG1753

Cut the thermister wires to length.IMAG1754

And the heater wiresIMAG1755

Strip all fourIMAG1757

Nice and cleanIMAG1758

Install the connectors.  Bigger portion on the wire shielding.  Smaller clips on the wire itself.IMAG1763

Same for the heater wiresIMAG1764

Crimp them on and check to ensure they hold with a tug.IMAG1765

Grab two connectors.

IMAG1766

Take a look at the instructions you didn’t need and ensure you install the correct way.IMAG1767

Prong side of the connector with the connector catch on the wire connector in the same direction.

The wires are solid colors, you can put them in the connector either way.

IMAG1768

Insert by hand and push them in tight with the pliers.IMAG1769

Install the hotend back in your assembly – however you do that.IMAG1770

Assemble the quick connects.IMAG1774

BAM!IMAG1775

Wrap it all back up.IMAG1776

Take out your PTFE cutters if you are going to reuse your existing PTFE.IMAG1777

WOW!IMAG1778

Clip back your PTFE so you get a tight connection.  I cut back my PTFE each time a remove it from the compression fitting.IMAG1779

CLIP!IMAG1780

Insert the PTFE into the compression fitting, ensure it goes in about a half inch.  If it goes in and stops right away, keep pushing.IMAG1781

Reassemble in reverse.IMAG1782

Power on your printer and check to see everything is okay.  In my case, Octoprint doesn’t like the printer off.IMAG1784

So I unplug the USB and plug it back in to allow Octoprint to reset.IMAG1785

Level or tram your printer and get back to printing.


There is a ton of other useful stuff on Makersteve.com and more coming every week.

Be sure to check out my Ultimate Build Guide for Creality Ender 3

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Happy Printing,

Steve

 

 

 

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