1 Topic by sturmth (edited by sturmth 2014-12-14 21:00:25)

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Topic: Filawinder with new type of filament guide

Hello,

I had some problems with the guide driven by a servo because I extrude 3mm filament which is obviously very stiff. Also I use large spools, 18cm wide and 12 to 26cm in diameter. For this constellation the servo had its problems to guide the filament to the spool. So I decided to find another way. Development took some time, but now it is running fine.
The idea was to use a threaded rod driven by a stepper motor. The threaded rod moves a guide for the filament. In principal I used the firmware which came with the filawinder but did some changes on this. The servopart was commented out and a new stepper part was included.
One of the main problems is, that in the usual arduino library the steppermovement must be finished before the program can run further. I found another library called AccelStepper. Its function is ideal for this project. You define an endpoint for movement and the stepper moves without pausing the program. So the circulation of the spool will run theoretical parallel to it.
In the adapted firmware you can choose different threads, diameters and so on. The easy way of choosing the diameter of the filament by a jumper stays untouched.
The signal for a movement of the guide is done by the hallsensor, as in the standard Filawinder.
If You have any interest in this project you might be interested to visit my blog (sturm.selfhost.eu) for details. Sorry, it is in german language. Maybe google translator will help. If any explanation is needed don't hesitate to contact me. I'll try my very best in english language too.
Please understand, that all parts of my project are free for use of anyone. For commercial use be fair and please contact first. For the firmware: Many thanks to Ian who allowed me to use his firmware as a basis. Maybe this path is implemented in future versions and can be choosen somehow.
The direct access to the project is http://sturm.selfhost.eu/wordpress/cate … elautomat/

for clipboard ....
sturm.selfhost.eu/wordpress/category/projekte/drahtfuehrung-fuer-wickelautomat


Best regards
Thomas

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2 Reply by elmoret

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Re: Filawinder with new type of filament guide

Seems like the link is not working?

Filastruder - the robust, inexpensive filament extruder
E3Dv6 All Metal Hotend - the premier 3D printing hotend

3 Reply by sturmth

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Re: Filawinder with new type of filament guide

Hi elmoret,
I tried it and it worked. I do not understand where the problem might be. I copied the link as text in addition. The forum system cuts parts of the link, if it recognizes a link, but if I touch the link direct it works for me.

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4 Reply by elmoret

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Re: Filawinder with new type of filament guide

Here is what it shows for me:

http://i.imgur.com/epbT0Ke.png

Filastruder - the robust, inexpensive filament extruder
E3Dv6 All Metal Hotend - the premier 3D printing hotend

5 Reply by sturmth

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Re: Filawinder with new type of filament guide

both versions? link and text copied to browser?

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6 Reply by elmoret

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Re: Filawinder with new type of filament guide

Yes indeed. Maybe it is because you are logged into your wordpress account or something?

Doesn't work through google translate either.

Filastruder - the robust, inexpensive filament extruder
E3Dv6 All Metal Hotend - the premier 3D printing hotend

7 Reply by sturmth

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Re: Filawinder with new type of filament guide

can You access sturm.selfhost.eu ?

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8 Reply by elmoret

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Re: Filawinder with new type of filament guide

Same message there.

http://i.imgur.com/epbT0Ke.png

And it redirects me to "http://sturm.selfhost.eu/wordpress"

Filastruder - the robust, inexpensive filament extruder
E3Dv6 All Metal Hotend - the premier 3D printing hotend

9 Reply by sturmth (edited by sturmth 2014-12-14 21:30:58)

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Re: Filawinder with new type of filament guide

redirect is right, this is ok. Now I tried from outside my own network and it runs. I cannot imagine the problem.
Anyone else outside there with problem or success?
I checked the blog. There were lots of accesses even of US-people, even today. No blockings. Which browser do You use? Any proxy?

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10 Reply by IanJohnson

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Re: Filawinder with new type of filament guide

The direct access link works for me as-is.

Google translate version - https://translate.google.com/translate? … edit-text=

For tension, you could put a short PTFE tube in the guide.  Then add a screw into the side of the guide to push against the tube and pinch the filament.  You could adjust the tension exactly how you want by how far you turn the screw.

11 Reply by sturmth

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Re: Filawinder with new type of filament guide

Sounds good. But what is the problem with elmorets machine? When You found it, please let me know.

I will try the trick with the srew and the PTFE tube. But in the moment the machine is running. I will tell, when I have done this.

Good night ..

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12 Reply by elmoret

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Re: Filawinder with new type of filament guide

Ian's link works. Not sure why the other one didn't - but his link doesn't show the photos.

Filastruder - the robust, inexpensive filament extruder
E3Dv6 All Metal Hotend - the premier 3D printing hotend

13 Reply by quok

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Re: Filawinder with new type of filament guide

sturmth -

This is an excellent project! Will you be sharing the STLs for the new parts?

14 Reply by sturmth

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Re: Filawinder with new type of filament guide

Yes I will share the stl-files. But at the moment they have some errors. I had to do a lot of work after printing. I will design a correct version and publicate then. Give me some days.

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15 Reply by CFTechno

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Re: Filawinder with new type of filament guide

Thomas,

Love the project! Could not read the real fine details because my German is not that good but really like the idea!

16 Reply by sturmth

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Re: Filawinder with new type of filament guide

Again my offer to everybody:
Ask any detail here and I will try to explain in english language.
I understand Your problem to follow all my thoughts and ideas in my german blog, but it is a problem for me to imagine which details are problematic to understand for english speaking people. I do not have the time to make my blog multilanguage, sorry for that.

Regards
Thomas

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17 Reply by CFTechno

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Re: Filawinder with new type of filament guide

Thomas,

I'm I correct in understanding that for the wickelautomat you use the two endstops to trigger the arduino to switch the direction of the stepper?

18 Reply by sturmth

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Re: Filawinder with new type of filament guide

Hi CFTechno and all other interested people,

yes indeed, the endstops trigger an immediate stop of the movement (even if the last step is not fully done) and change the variable for the direction. With the next trigger of the spool rotation the guide will move a full step in the new direction. In my actual built I fixed the endstops with screws. The initial idea was to have them moveable for different spool sizes. I'm thinking about this but did not find a good solution till today.
By the way: Today there is no real use of a different trigger impulse from right or left. But I think of some features for the future . Maybe it is useful to count layers or something like this.

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19 Reply by CFTechno (edited by CFTechno 2014-12-17 11:12:03)

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Re: Filawinder with new type of filament guide

Yes indeed making the endstops moveable would allow adjustment to the width of the spool used. Replacing the aluminum L-shaped bar with a smooth rod could make adjustment of any endstop position easier.

Would it not make is less complicated and possible cheaper to use and  DPDT relay (~$5,-) instead of using an arduino? Disclaimer : I have no electronics skills at all!

20 Reply by sturmth

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Re: Filawinder with new type of filament guide

Using a smooth rod might be an option. I will bear this in mind ...

DPDT relay? I had to look it up. I did not know about this. Ok, this could be a solution for standalone use. But for this special case I found it easier to use the arduino of the Filawinder. To make this clear: I do not use a standalone arduino. I flashed a modified firmware to the arduino of the filawinder and used the ports on the pcb.

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21 Reply by CFTechno

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Re: Filawinder with new type of filament guide

Ahhh...yes if the arduino is already present then it's easier use of it.