New extruder carriage design for E3D Bowden Hot end V5

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Bachgassenbande
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Re: New extruder carriage design for E3D Bowden Hot end

Post by Bachgassenbande »

Have had the same issue before
My tensions screws are really losse screwed in; I can still move them by hand.
If have had tensions before as I did with the original design, then the motor was still working but the filament was cut by the gear.
Loosing the screws did resolve this.

If needed you can install longer screws to get tension looser.
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alanh
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Post by alanh »

No the stepper doesn't skip.

I can't see how the tensioners work though. The arm with the roller on gets pretty much pressed up against the filament guide casing when assembled even when pretty loose. If you tighten the two bolts it really has nowhere else to go apart from making the lock arm and springs tighter.

I've ended up adding a washer in-between the roller arm and the filament guide casing to give a little more release from compression. I guess a spring in there would be better.

I've got a job going now, and I'll see how that turns out.

alanh
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Post by alanh »

Here's my assembled head though. Very pleased with that satoer !!
photo.JPG

satoer
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Post by satoer »

Thanks for sharing!

Have I measured the length of the used M4 spring-bold wrong? Should it be 50mm instead of 45mm?
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alanh
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Post by alanh »

Possibly, I did think it could be 50mm from your video, but I don't have any 50mm to try at the moment.

I've ended up using 2 washers on each bolt for things to work currently though.

alanh
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Post by alanh »

In fact, watching your video again, I'm convinced they are 50mm.

There is just so much more play in the roller arm area.

satoer
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Post by satoer »

Okay, sorry for the inconvenience. I've updated the video with annotations and the parts list on Thingiverse.
My Felix 1.5 printed designs on Thingiverse
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alanh
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Post by alanh »

No worries. I've just ordered some 50mm bolts and give it a try.

But seriously, you've done an awesome job, hopefully I'm not coming across as complaining, because I'm really not. It's great that you've tackled this and done such cool work !

Thank you !

satoer
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Post by satoer »

You're not coming across as complaining at al, I'm glad you've found a error in the documentation so I can solve this for anyone else using this feeder.
My Felix 1.5 printed designs on Thingiverse
E3D V6 Hot end upgrade for your Felix
Tweezer bracket for your Felix
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alanh
Posts: 78
Joined: Tue Jul 23, 2013 7:08 pm

Post by alanh »

So, I've had some more extruder jams... :-(

I took a deeper look and if the filament gets the slightest bit squashed it will even jam in the E3D hotend. This is purely because my filament reel may have become a little tied up when the extruder pulley wheel was turning and possibly slipped on the filament causing the filament itself to become distorted.

Realistically, this is what's probably been happening with the orignal hot end.

I may try swapping the pinion wheel on the extruder motor for a helical version to see if it helps with the pull. Either that or something fancier for the filament reel to help the extruder not feel the pull as much when the reel gets cross tangled when pulling.

Anyone else bumped into this before ?

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