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Hallo Kai,
scheint, dass meine PM nicht ankommt...
Was soll den das Steckernetzteil 12V/10A von DTK kosten?
Viele Grüße
Heinrich
by
powdermetal
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Schwarzes Brett
Quoteobelisk79
All that makes a lot of sense: Actively rotating the grooved rollers will avoid the "free" torsional moment of the filament - simple & clever!
A new generation of extrusion systems is born
by
powdermetal
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Tech-Talk
Do you have the application / patent number?
by
powdermetal
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Tech-Talk
This article may give some interesting insights to the thermal balance inside an heatbreak:
Titanium Heatbreak by Well-Engineered
From this we can learn, that just the lower few millimeters of the heatbreak need to be cooled.
Zatsit applies this in a very minimalistic & smart way: Just strip an elastic water cooling pipe over the heatbreak and you are all done...
by
powdermetal
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General
I did buy Delrin balls in the past at amazon.com from the U.S. - try a search for "delrin precision bearing balls".
A source in Germany could be Kugel-Winnie.
by
powdermetal
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Delta Machines
Cool! You found your solution!
What's the rated torque of your motor and what current are you running it and what type of hobgear do you use?
by
powdermetal
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General
Quoteo_lampe
I suggested a different design for a 1:8 geared cycloid drive in the Smart Effector adapter thread, but want to discuss it here where it belongs.
As a newbie in fusion360 I failed to construct the inner gears, but the main things I wanted to point out are the 6mm bronce bushings on 4mm dowel pins.
There is only one tooth of either gear in full contact with the bushing, so I think on
by
powdermetal
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General
Hey o_lampe,
clever idea to mount the drive unit in an angled way - provides a much better packaging especially for the rods' clearances!
Currently I am running my 4HR05-0504S stepper motor at 0.4A (with 8825 drivers) without motor cooling, using 1.75mm filament (retract: 0.3mm, speed 10mm/sec, accel. 4000mm/sec^2). The retract/speed settings seem quite conservative, but with direct extruders t
by
powdermetal
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Delta Machines
Hey Sven,
Du warst hier immer Inspiration und gleichzeitig Ansporn für mich: Fundiertes Wissen von der Sache, so viele gute Ideen, nicht lange schwätzen, sondern einfach machen und das auf technisch hohem Niveau!
Viele Grüße
Heinrich
by
powdermetal
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Schwarzes Brett
Quoterealthor
@DC: Ideally the tooth engagement is to have contact with both larger gear's adjacent tooth flanks or with several teeth but in practice the gears are not perfect and there is always a gap besides the tooth (pls excuse me if this looks like lecturing you, it's not):
However, because I am tensioning the cable (steel?) so that both driven gears press on opposing flanks on the motor g
by
powdermetal
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Mechanics
And take care, that your tensioning cable is elastic enough so that i creates sufficient tension, even when your mechanical tolerances try to make it "loose"...
by
powdermetal
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Mechanics
Aynik Technology posted a great movie on their implementation of the cycloidal gearbox combined with the Bondtech Drivegears:
This post on Aynik's website provides a good overview and interesting in-depth information.
For those of us who are not really familiar with Japanese, Google's website translation will help...
Great solution - I like the way, how the Bondtech gears have been integrated
by
powdermetal
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General
Hi Simon,
great job - you seem to become an expert in making those gears!
Joining the output hub with the shaft into a one-piece solution is a good idea - it saves some space in the packaging and removes potential troubles with weak press fits.
For the eccentric you may circular-mill it in one clamp by using a kind of undercut-tool, which allows to 'undercut' for the second (lower) eccentric di
by
powdermetal
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General
Ich habe mal versucht, den "ausufernden" Platzbedarf üblicher Kühlkörper etwas einzudämmen. Thermische Simulationen zeigen, dass die ersten paar Kühlrippen am Heatbreak die eigentliche Arbeit machen und alles darüber praktisch überflüssig ist.
In diesem Fall wurde ein E3D V6 1.75mm Kühlkörper von 42.7mm auf 18.5mm gekürzt.
Die Befestigung kann z.B. mit M3 Linsenschrauben durch axiales Klemmen de
by
powdermetal
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Extruder, Hotends & verschiedene Materialien
Simon,
great implementation of o_lampe's proposal!
Can you show a section-cut of the internals? I would be interested in the way how you extend the stepper motor shaft and in the way how you arrange the bearings.
Looking forward to see your progress!
Heinrich
by
powdermetal
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General
Quoteo_lampe
My POM gears worked flawlessly until I changed the effector for some other extruders I'm testing ( E3D chimera & cyclops, diamond ) The cycloid drive is sitting on my "trophy shelf" waiting for another chance.
Funny how the Bowden setup in your test has the best seam. The 1.75 sample has some signs of ringing right from the seam and the 3mm sample has diameter/extrusion variatio
by
powdermetal
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General
Added the Aluminium gearbox to the updated drive unit:
Some first print results (from upper to lower image):
- v04 gearbox with Aluminium gears (1.75mm PLA)
- v04 gearbox with printed gears (3mm PLA)
- my bowden setup (3mm PLA)
Actually the wavy structure from transmission errors has nearly gone. Not really surprising - gear manufacturers know, why they aim for precision...
Kewtdz &
by
powdermetal
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General
Quoteasbo
Looking good powdermetal
Sorry I haven't posted the SolidWorks conversion I said I would, I got frustrated and gave up because I could never get the formula to work properly.
Have you had a look at Omar Younis' well detailed documentation about Building a Cycloidal Drive with SOLIDWORKS?
by
powdermetal
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General
Finally, the precisely-machined components for the all-Aluminium gearbox arrived:
Will see, what the benefit in print quality will be...
by
powdermetal
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General
QuoteKewtdz
Thank you all for the information! I'm not sure the extent of the tooling that my local makerspace has but I think much of it is imperial based. Since the parts were designed with a single cutter, I'll probably purchase the required tooling.
Also, o_lampe, I thought of using POM too and wondered if it would work well. After hearing your experience, I'll probably go that direction as
by
powdermetal
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General
QuoteKewtdz
QuoteSimon0362
managed to get my CNC mill functioning at the weekend and the first run was the eccentric gears - the photos show two batches (the beauty of CNC to replicate!) along with the trial piece (failed to cut one pin hole!) and a couple of plastic printed pieces in a rather garish yellow...
Could have been easier if I had had some aluminium of the correct thickness instead of
by
powdermetal
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General
Quoteo_lampe
This mockup above is still without stepper. I'm afraid it will interfere with the rods, as soon as they "go sideways"...
My earlier idea I shared with powdermetal was to split stepper and gearbox and put them on each side of the filament drive gear with an extended shaft on the stepper and a hollow shaft as gearbox output. That way the COG would be in the middle of the effector and
by
powdermetal
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General
Quoteo_lampe
I was wondering if the outer gear shape has to be milled or could it be build with a plain backplate and dowel pins?
The free ends of the pins would then be pressed in the extruder gear housing.
Such an open design would allow watching the cycloid do it's job, too
Yes - can be done: Arranging 16 pins with Dia3.2 at a PCD of 32 will do the job as well. The outer gear's profile is ju
by
powdermetal
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General
QuoteSimon0362
Hi PM - good idea to move and refocus the discussions.
These 3 screenshots show my own adaptation of your mount as described in my 'ping' - BTW, I converted this for 1.7mm instead of 3mm since that is all I use
The intention is that this sits above the spider and the E3D sits underneath with long screws clamping the two parts with the spider in the middle. The setting on my Kossel
by
powdermetal
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General
QuoteGenie
Hi powdermetal,
Recently, I'd read the previous thread and strongly interested in your design. Then I asked my friends to join for group buying of NEMA 14 pancake stepper to replicate the experiment. Now we share a couple of steppers each among three guys, and another one is going to buy himself. Parts on BOM are already in the hands. Slowly starting, I hope it will go well.
Konnich
by
powdermetal
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General
Quotedc42
Looks good! Two questions:
1. The BOM says to use the 3mm direct drive variant of the E3D. Can I build a 1.75mm version instead?
2. What is the reason for using a 0.9deg motor? With 16:1 gearing I would have thought 1.8 deg would be adequate.
1. Yes, you can build in the 1.75mm V6 as well - the CAD files include proper files for the block above the hotend and the idler lever (CycloEx
by
powdermetal
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General
QuoteSimon0362
Ping.........!
Anybody advanced any further with this project?
I heavily modified the casing drawings to arrive at something suitable for my Kossel where the E3d hangs underneath the spider but a load of other diversions mean that I don't yet have a fully operational unit - but I am interested to hear how others are getting along.
Having recently moved house, my workshop is slowl
by
powdermetal
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General
QuoteSimon0362
Ping.........!
Anybody advanced any further with this project?
I heavily modified the casing drawings to arrive at something suitable for my Kossel where the E3d hangs underneath the spider but a load of other diversions mean that I don't yet have a fully operational unit - but I am interested to hear how others are getting along.
Having recently moved house, my workshop is slowl
by
powdermetal
-
General
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Pages: 123