Ender 3 Extruder Problems

A couple of weeks ago I noticed some inconsistent print quality. I found the cause was a worn bushing in the tension arm on my Ender 3. The material was hanging up on the sharp edges of the bushing causing inconsistent feeding.

So, I found this replacement kit on Amazon and thought it looked like an improvement over the stock hardware.

After getting it installed I found the drive gear wanted to slip…a lot. Causing poor printing. It was a slightly different condition than the original problem. I tinkered with it for a while and continued getting poor print results.

I am going to try this dual drive hardware. Has anyone else used this…or one like it?

Yeah, we swapped the extruder on the CR-10S at the makerspace with a set of Bondtech drive gears in a 3D printed housing. Basically we just chopped the extruder portion off the Prusa hotend setup and made a few modifications to get it to mount properly. Definitely works a lot better than the original extruder that wore out.

We originally used a set of non-Bondtech drive gears that were cheaper, but they started wearing out pretty quickly.

Just an observation the setscrew is not lined up with the flatspot on the shaft in the 2nd photo

Also I had bought one like this of Amazon too be sure that the lever is not hitting the screw that holds it to the stepper motor I think I remember it being a different screw for that reason

There are two set screws on that gear. One of them is on the flat of the motor shaft. And yes, I am using the countersunk bolt under the tension arm.

Hey Sean!

Did you get this figured out?
How tight is your tension screw? They do require a decent amount of tension, it could also be a clog or something else in your hotend.

If you’d like we could meet up at MakeICT and see if we can’t troubleshoot it! I’m always down for a printer day!

Yeah! The new extruder is working great. I think I may have the calibration off just a bit…but it’s so much better than before. And I printed some TPU last week; which went much better than expected.