UP Mini goes Bowden

Post improvements made for UP, and share ideas.
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koreandi
Posts: 39
Joined: Sun Dec 21, 2014 11:24 am

UP Mini goes Bowden

Post by koreandi » Fri Feb 12, 2016 11:47 am

Dear community,

after struggeling with PLA prints I refit my UP Mini to a Bowden Extruder.
Another reason was that I wanted to experiment with different Nozzles. As the UP Mini has Nozzles with inside threads I wanted to be able using "standard" Nozzles with M6 outside thread.
And of course I did it because I wanted to try it. :D

I made a new Heat-Block to fit in the original Thermo-element and a new HeatEnd.


Unfortuenately I cannot upload pictures ("The image file you tried to attach is invalid.").
Her are some links:

Bowden Extruder:
https://drive.google.com/file/d/0BwFncF ... sp=sharing

Bowden Extruder 2:
https://drive.google.com/file/d/0BwFncF ... sp=sharing

New HotEnd Magnetic Plate:
https://drive.google.com/file/d/0BwFncF ... sp=sharing

Clip-On-Fan HotEnd:
https://drive.google.com/file/d/0BwFncF ... sp=sharing

Groundplate for HotEnd:
https://drive.google.com/file/d/0BwFncF ... sp=sharing

Selfmade Heat-Block:
https://drive.google.com/file/d/0BwFncF ... sp=sharing

Extruder from China:
http://de.aliexpress.com/item/3D-Printe ... 77021.html
(refitted to the original stepper - the original has more torque)


By those mods I had to reconfigured all the Layer because my Gear of the Bowden has another Diameter.
I reconfigured the to adjusted Layerwiths, depending on the Layerhights.
This makes it possible to print smaller walls. There is a rough recommendation how to calculate the Layersettings.
I will provide my settings this weekend.


So what is my first summary??

The fact that I removed the Stepper from the axis shows very straight and smooth prints without artefacts. The small axis and plasticmount don´t have to carry so much weight anymore.

I uncoupled the stepper from the HotEnd. This makes PLA never fail again (never?? - Hopefully).

When axis are moving I mean there is less noise.

The HotEnd heats up more quickly, I am still using a Hardware TempMod.

The Fan for cooling the HotEnd doesnt have to be that strong and noisy.



But there are also some disadvantages:

Prints get a little hairy. PLA stronger than ABS. But that is a point I can live with right now. The small hairs can be removed by Hand.
The Problem is that a Bowden System is more flexible than directdrive. The retract of the printer should be increased but I have no clue how. Does anyone has a tip?
Maybe if the G-Code will be accessable it is possible.

I think in PLA mode the retract is a little bit more but the HeatBed is deactivated. I still need sometimes the Bed for larger PLA Prints and don´t want to have a external Power Supply.

I can not close the cabin. Have to make a new slot for the Bowden, which needs more space now.




Anyway I will provide you some pictures of example print this weekend.

I you have any questions, ask them...

Otherwise have a nice weekend.

koreandi
Posts: 39
Joined: Sun Dec 21, 2014 11:24 am

Re: UP Mini goes Bowden

Post by koreandi » Mon Feb 15, 2016 11:19 am

Here is a quick print of a Raspberry Pi case (http://www.thingiverse.com/thing:922740) on PLA with 0,25mm Layer and speed normal with adjusted Layersettings.
In the First picture you can see the hairy spots. The HoteEnd still spits material out of the nozzle when doing jumps. As I said I should increase the retraction when doing jumps.
The Material can be removed by hand.

Overview of Raspberry PI Case:
https://drive.google.com/file/d/0BwFncF ... sp=sharing

Detail of straight wall:
https://drive.google.com/file/d/0BwFncF ... sp=sharing

As I still cannot upload pictures I have to link them. Sorry. Board Limit is reached...


More details and prints can be uploaded if someone wishes...

Greeting
Andreas

Matchpoint
Posts: 74
Joined: Tue Dec 15, 2015 10:50 pm

Re: UP Mini goes Bowden

Post by Matchpoint » Tue Feb 16, 2016 2:12 pm

nice work. I bought all the parts to do the same thing awhile ago, just with a e3d v6 hotend. Never got around to doing it though. How hard was it wiring things up?

koreandi
Posts: 39
Joined: Sun Dec 21, 2014 11:24 am

Re: UP Mini goes Bowden

Post by koreandi » Fri Feb 19, 2016 11:37 am

Hi,

the wiring isn´t really nice on my built. Have to redesign some smaller parts. But my focus was on the function.
That´s why I didn´t post a complete overview. :lol:

Hope to get it to a functional design very soon and then reload some pics.

Greetings
Andreas

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