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Frank Helmschrott
Works at Kommuni Media
Attends School of life
Lives in Mering, Germany
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Frank Helmschrott
moderator

Show and Tell  - 
 
The new carriage is just printing its first layers and it not only looks quite nice but moves quite nice too. I'm happy how this turned out. Didn't think that my first printed version of the new carriage would fit instantly in all terms - even with the clips for the +igus Inc. ECLM bushings.

The play of the carriage is way lower than with the ball bearings (i would never talk about zero play just because that doesn't exist g).

Here's some footage.
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Stephen Baird's profile photoMatt Miller's profile photoMatthew Kelch's profile photo
3 comments
 
Looks great, nice work!
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Frank Helmschrott
moderator

Show and Tell  - 
 
Just wanted to share my development in terms of new Extruder Carriage for the Spider V2.

See my current design state with this public Fusion360 link: http://a360.co/2jw5CQK (It may change over time and be unusable, I will share it once I have a working "final" version.)

I decided to take some ideas from other Designs I had seen and add some stuff that came to my mind. Of course this is notably inspired by +Walter Hsiao again but I turned the fans around this time as +Matt Miller did in his design. This gives plenty of room behind the E3D and hopefully works better with cooling. Therefore I decided to step back to the stock 30mm fan at first and see how it works.

One of the biggest changes of course is the fact that the fan duct isn't a separate part now - i put everything together into one piece. The primary reason is that the bed level sensor I'm using (an IR Sensor) that needs to be mounted quite deep down to the bed and this works much better if those are not separate parts. Also this should be simpler at the end. Design was a bit challenging of course to be able to print it without tons of support.

For the linears I decided to test something new. I had a guy from Igus in my basement today and will receive some ECLM samples around in a few days (http://www.igus.com/wpck/3778/igubal_Clips_Gelenklager_ECLM). They are similar to the SDP-SI bushings and may work in this situation. They could be a cheap and easier to source alternative. I will try them on the carriage at first and if it works will probably give the 10mm ones a try on the outer ends.

The thing is already printed and test in terms of hotend fit, cable routing and all that stuff – I'm just waiting on Igus now.

Happy to hear your comments.
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Eric Moy's profile photoEduardo Ribeiro's profile photoFrank Helmschrott's profile photoStefano Pagani's profile photo
8 comments
 
Nice! I'm going to adopt it for the chimera and try to keep the same form factor

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Frank Helmschrott
moderator

Discussion  - 
 
Hey everyone. Does anyone know of a good European Source to get these pushfit (self aligning) bushings that are used in the original Eustathios design? I switched to graphite bushings from Robotdigg first and am now using LM8LUU for the center (carriage) but I'm not happy with the play of the latter. I'd like to give the original ones a try as I do have to redesign my carriage anyways (still for cooling issues).

The only source I know is Lulzbot but they don't have them in there EU warehouse for quite a while now.
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Ted Huntington's profile photoMarkus Granberg's profile photoFrank Helmschrott's profile photoSean B's profile photo
11 comments
Sean B
 
+Frank Helmschrott yep, those are the ones
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Frank Helmschrott

General discussion  - 
 
I'm looking for some good linear guide rails. I plan to build a CoreXY-table for a simple laser cutter and thought I could use some Hiwin style linear rails. Guess 15-size should be enough.

Does anyone have a good source for some cost effective ones? Don't look for the cheapest but for a good price/quality balance.

Thanks!
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Jeff DeMaagd's profile photoJo Miller's profile photoFrank Helmschrott's profile photo
10 comments
 
Thanks, +Jo Miller will have a closer look at them. Didn't find any shipping cost info on the site and they seem to have given up on Twitter. But +RAT RIG Hardware looks promising.
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Frank Helmschrott

Questions/Help  - 
 
Cooling the +E3D-Online v6 hotend - this is something i'm struggling with for a while and only do see it on my Eusthatios (Bowden Setup) so far and even a bit worse with my new Hotend holder/carriage system. I'm attaching some CAD screenshots to clear things up.

As you can see I designed (and tested) two differen versions. One with a 40mm fan and one with the original 30mm fan. The original version seems to be better but still I do see some problems where I guess they are related to insufficient cooling: When extruding really slow (on small prints and also manually tested with 10mm per minute feedrate) i get underextrusion and then the filament that was missing suddenly comes out in big blobs.

I wonder if my design is so horribly wrong that this happens? Is the E3D really this sensitive when it comes to cooling? Are the back exhaust channels probably not big enough to get the air out?

Some data:
- 24V setup with 24V Fans
- Fans connected to a mosfet output with 255PWM softwarewise wired to Repetier Firmwares extruder cooling feature (triple checked that it runs with 255).

Any idea how I could get closer to this? If anyhow possible I would like to avoid changing the carriage as this would mean quite some work but if necessary i'd do it of course.
12
Shauki B's profile photohon po's profile photoFrank Helmschrott's profile photo
10 comments
 
Unfortunately i don't see the effect with 40mm fan at all that you had but probably my 40mm fans were all too bad. Mine were barely better than the 30mm and I really find it hard to get cfm values they promise to have.
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Frank Helmschrott
moderator

Show and Tell  - 
 
So here's the missing filament spool holder missing in my last post. Shout out to the creator Maxime. Find his post here https://plus.google.com/117610054892104446719/posts/b5PfGWD7yuD?sfc=true


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1
Maxime Favre's profile photoFrank Helmschrott's profile photo
2 comments
 
oh yeah didn't mention that I did this "upgrade". Looks a bit more trusty to me :)
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Frank Helmschrott
moderator

Show and Tell  - 
 
Just received the samples from +igus Inc. today and put them straight into my first print. Fits quite nice and feels great though they have a little bit of play. At the end its still less than I had with the LM8LUU before. It's really hard to get some good ones of these linear ball bearings.

How's the play with the bronze bushings you guys are using?

For reference: These Igus ones are Igubal ECLM-08-02. If they work well here I will probably also give them a try on the 10mm rods on the outsides.

9
Eric Moy's profile photoJo Miller's profile photo
2 comments
 
zero play on my herculien bronze bushings 
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Frank Helmschrott
moderator

General OpenSLA Discussion, news, machines etc.  - 
 
As I already wrote a while ago this Kudo3D Titan 2 I had here to play around for a while is now for sale. It's on eBay in case anyone wants to jump on.

http://www.ebay.de/itm/272512750502

Note: It's not me selling this thing but a friend of mine. Please ask him via eBay if you have any questions - he's the best one to answer them.
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Frank Helmschrott
moderator

Discussion  - 
 
I'm searching for inspiration, guys. I wonder what carriages you guys are using except from the standard one. I'm missing motivation and creativity lately and already spent some hours drawing and throwing away ideas. My last design was based on the one from +Walter Hsiao which basically was great but failed at cooling the E3D in the right way. Also the mounting of my special kind of Bed Level Sensor (the small IR sensor) wasn't that good. I liked the dual blower setup for part cooling and I thought it would be worth keeping it.

If you hadn't seen the design, you can find some stuff here https://plus.google.com/+FrankHelmschrott/posts/ZCLFZ7t5qX9

Basically i need better ventilation (or better air throughput) on the back of the E3D and a better place to mount the IR sensor board. Also I will probably switch back to the graphite bushings or even to SDSPI if I can get some.

Anyways - would be happy to see your carriages if you did any special ones.
1
Frank Helmschrott's profile photoMatt Miller's profile photo
7 comments
 
Cool. Just let me know - happy to help!
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Frank Helmschrott

LaserWeb Support (Not For MACHINE SETUPS)  - 
 
Hey there,

sorry if I'm totally in the wrong group for this but I thought it might worth asking you. I'm just diving into Laser cutting things. We're focussing on engraving wood and will just start with a UV diode laser. I thought there should be any plans around for a good x/y gantry probably based on corexy or Hbot without me needing to draw everything myself. I'd love to have something enclosed with a protective lid.

Does anyone know of good projects? I could draw everything myself but would also love to settle on something already done and probably put in some work there if it's open source.

Thanks!
1
Alex Krause's profile photoAriel Yahni's profile photoFrank Helmschrott's profile photoArion McCartney's profile photo
14 comments
 
I fully enclosed mine. Also built an exhaust fan into it with a carbon filter for fumes. It works pretty well. I just used MDF and printed the latch and inlet covers. The window is from jtech. Don't mind the mess, I'm still working on getting GRBL v1.1 running haha.
https://lh3.googleusercontent.com/msbKV-QYV4-OmuVKPI758ikZvhgkKbcPuX4pQXyDB4wg4kQF5TQgaH6Mvys33bXyrrRntufW1pc
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Frank Helmschrott

Questions/Help  - 
 
After seeing some E3D issues that I thought could be based on the cooling beeing not geed enough in my setup i thought before i completely redesign my carriage I will try some more "force" in cooling. The easiest way would be to change from a 40x40x10 that i used first (before seeing that even the orignal 30x03x15 isn't enough) to a 40x40x20 fan.

Here's some pics from the first test print. Looks like some decent result - i will continue to test and redesign my carriage after that. Looks like it's indeed a cooling issue.

this solution doesn't work forever of course as it steals 10mm of x and y build volume :)

This relates to: https://plus.google.com/u/0/+FrankHelmschrott/posts/gZ2ETS9h7xX?sfc=true
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Shauki B's profile photoSean B's profile photoFrank Helmschrott's profile photo
7 comments
 
+Shauki B you're right - this print isn't perfect but that's not what it was meant for. It was printed way too fast and aggressive but it was only meant to look for the extrusion bug. Regarding Z i still do have to investigate. My guess is that the magnets only hotend fixation doesn't work very well and i need to try another fix on the next design. As I will need to completely redesign I will keep that in mind and see if it's enough to make it better.

+Sean B the fan I have mounted now is a Sunon and i'm quite glad with it. I only paid ardoun 7€ (~8$) for it at a german online shop which isn't really known for cheap prices. 
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Frank Helmschrott
moderator

Discussion  - 
 
I wonder how retracts for you guys work on your Bowden setup?

I'm using the Bondtech and of course reliable movement of the filament isn't an issue with that. The E3D v6 on the other hand looks to have problems in my setup with filament beeing printed too slow or with too many retracts.

Depending on the filament I see irregular extrusion: nearly no extrusion first and then a blob of filament coming out of the nozzle. I see this happening with frequent retract following each other or in some smaller prints. This seems to be worse with filament that has quite a big zone of melting going from soft/honey like/gooey to liquid.

Is my 40mm fan probably not good enough to deliver the right airflow? I thought it should be but maybe that could be the problem? I have seen this in the past already with the 30mm fan so I thought it couldn't be that problem but ineffective cooling is the only thing I could imagine. Or is it just a general problem with this situation in combination with longer retracts like we need the on the bowden setup?

Maybe +Sanjay Mortimer can add something to the discussion.

2
Maxime Favre's profile photoRoland Barenbrug's profile photo
2 comments
 
Had similar problems which I essentially solved by going back to basics: first make sure extrusion works fine when printing in continuous flow (no retraction an no break) e.g. small tower. That showed already that slow printing (< 20mm/s with PLA in E3D Volcano) can be an issue.
Next introduced retraction (not more than 4.5mm otherwise pulling melted fillament in cold zone), doing it as fast as possible (65 mm/s) with high acceleration.
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Story
Introduction

3D printing nerd, CNC fan, Hobbyist.
Bragging rights
still workin' on that life
Education
  • School of life
    1974 - present
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Male
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Webworker
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  • Kommuni Media
    2000 - present
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Ich kann nicht anders als Day1Data in den höchsten Tönen loben. Vom ersten Moment an war der Kontakt professionell und der Prozess transparent und fair. Datenrettung ist ein sensibles Thema, weil man in aller Regel plötzlich und unerwartet damit konfrontiert wird. Hier hat Day1Data stark dazu beigetragen das nötige Vertrauen aufzubauen in dem sie mit ihrer kostenlosen Vorabanalyse in der die Daten quasi vollständig wiederhergestellt werden ihren Beitrag zum Risiko leisten und Arbeitszeit investieren mit dem Risiko dafür nicht bezahlt zu werden. Bevor man einen Cent bezahlt weiss man also zumindest genau welche Daten man wieder bekommt. Ich würde jederzeit wieder zu Day1Data gehen.
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Eigentlich wollten wir es als Bayern vermeiden in ein bayerisches Lokal in Hamburg zu gehen, doch die Umstände (Umstehende Restaurants überfüllt) haben dann doch dafür gesorgt. Die Tatsache, dass das bayerische an dieser Lokalität eher einer Satireveranstaltung gleicht, soll auch nur minimal in die Bewertung einfließen. Das Lokal ist gemütlich eingerichtet, bietet ordentlich Platz und abgesehen von der grauenvollen Musikmischung (Schlager, volkstümliche Musik, viel Trash) kann man hier sehr gut sitzen. Diverse Paulaner-Biersorten werden in für Bayern nicht immer üblichen Mengen ausgeschenkt - die Schankqualität ist auch eher unbayerisch. Die Qualität des Essens war von gut bis mittelmäßig verteilt. Leider wird auch hier sehr viel Bayern simuliert. Bayerische Ess- und Trinkkultur ist eigentlich einfach, hier ist man dennoch weitestgehend überfordert. Der Service war heute Abend leider auch eher unterdurchschnittlich - vom anwesenden Personal hat niemand ernsthafte Leidenschaft für seinen Job gezeigt.
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