I will give it a try - printing a 200 tooth and a taller 200 tooth flex
gear.
http://electronicsam.com/images/greenmachine/IMG_20210126_22.jpg
On Tue, Jan 26, 2021 at 8:07 PM Chris Albertson
wrote:
> I could read it well enough to see that they only quote prices. The
> old saying is
I could read it well enough to see that they only quote prices. The
old saying is that if you have to ask the price you can't afford it.
I can see where plastic gearboxes might be a good solution in perhaps food
service or other places where you can't have contamination from
lubricants. Or
In the "technical" section it says Efficiency 40% for the 28:1 ratio. Are
harmonic drives that bad, or is that a plastic limitation?
-Original Message-
From: Rene Hopf via Emc-users [mailto:emc-users@lists.sourceforge.net]
Sent: Wednesday, 27 January 2021 8:38 AM
To: Enhanced Machine
On Tue, 26 Jan 2021 at 22:38, Chris Albertson wrote:
>
> Igus makes 1st rate stuff.
...
> My German language skill is minimal
> but it appears prices are quoted, not posted online.
English: https://www.igus.co.uk/product/20413
(Also available in dozens of other languages by pressing the
I asked Igus for pricing on the cycloidal gearboxes back
in 2018, and the rep said he would ask hq, but never
got back to me. I don't know that they have really done
much with these.
-- Ralph
From: Chris Albertson [albertson.ch...@gmail.com]
Sent:
andy - thank you. I am going to have to draw up the 200 tooth outside gear
and see how that works.. (the diameter of the 200 tooth would have to be
the same diameter as the 202...) What is nice about what I have right now
is the pitch of the 2 gears is the same - so you can engage a lot of
Igus makes 1st rate stuff. Igus linear bearing is a common upgrade for
cheap 3D printers. They are more accurate and smoother than steel ball
linear bearings Any idea on the price. My German language skill is minimal
but it appears prices are quoted, not posted online.
In any case if I were
On Tue, 26 Jan 2021 at 20:13, Chris Albertson wrote:
> Is there a reason you need triangular splines? I think round ones might
> work better. They are the best shape for timing pulleys
The motion of the flexspline is quite complicated. HD are rather proud
of their special profile.
Here is the
On Tuesday 26 January 2021 15:11:02 Chris Albertson wrote:
> On Tue, Jan 26, 2021 at 11:30 AM Gene Heskett
wrote:
> > But that brings up the tooth profile problem. I've not seen a
> > timing belt that resembles the triangular splines?
>
> Is there a reason you need triangular splines?
Trying to wrap my noodle around, this. Two gears with the same pitch but
different tooth counts won't have the same diameters. So do they fudge the
pitches on the two so the diameters are the same, that way the band only has to
flex in a single axis? Not sure how well that would work on the
Igus makes plastic harmonic drives:
https://www.igus.de/product/20413
> On 26. Jan 2021, at 21:59, Chris Albertson wrote:
>
> I just did t quick Google and found several companies who make belts
> "sliced to order" in any width. 6" wide if you like
>
> The other way to "print" a flex cup
I just did t quick Google and found several companies who make belts
"sliced to order" in any width. 6" wide if you like
The other way to "print" a flex cup is the print a female mold and fill the
mold with urethane and kevlar fiber.
I'm working on a robotic/prosthetic hand that uses this
On Tue, 26 Jan 2021 at 17:52, Sam Sokolik wrote:
>
> andy - that seems like a neat experiment... Do you have an example of the
> HD version?
Yes, as I said, I own an example of it.
https://www.harmonicdrive.net/products/component-sets/pancake/fb-2
--
atp
"A motorcycle is a bicycle with a
It depends on what you are doing with the tablet. If it is
non-critical an iPad or even a cell phone works, you simply run a remote
display and your finger is a mouse. Almost everyone already is one.
But if used for drawing, wacon is the best and used are not expensive.
I've got two of them.
For the belt idea, it might work better to invert the whole thing, So you have
the belt teeth in and one gear with two fewer teeth than the belt, then the
follower wheels on the outside of the belt compressing it to mesh with the
smaller gear. The hardest part might be finding a belt wide
On Tue, Jan 26, 2021 at 11:30 AM Gene Heskett wrote:
>
> But that brings up the tooth profile problem. I've not seen a timing
> belt that resembles the triangular splines?
>
Is there a reason you need triangular splines? I think round ones might
work better. They are the best shape for
plus - you fold one inside out - the pitch doesn't match up very well.
On Tue, Jan 26, 2021 at 1:30 PM Gene Heskett wrote:
> On Tuesday 26 January 2021 13:04:11 Chris Albertson wrote:
>
> > The weak link on all 3D printed harmonic drives is the flex cup. The
> > plastic fails after some hours
On Tuesday 26 January 2021 14:32:43 Gene Heskett wrote:
> On Tuesday 26 January 2021 13:33:38 Valerio Bellizzomi wrote:
> > On Tue, 2021-01-26 at 10:31 -0600, brainf...@posteo.net wrote:
> > > who is using a digitizing tablet
> > > what are you using
> > > advice using it with linux
> >
> >
On Tuesday 26 January 2021 13:33:38 Valerio Bellizzomi wrote:
> On Tue, 2021-01-26 at 10:31 -0600, brainf...@posteo.net wrote:
> > who is using a digitizing tablet
> > what are you using
> > advice using it with linux
>
> Debian has drivers for the Wacom tablets.
>
Works with an Art Pad II ??
On Tuesday 26 January 2021 13:04:11 Chris Albertson wrote:
> The weak link on all 3D printed harmonic drives is the flex cup. The
> plastic fails after some hours of use.The best design I've seen to
> overcome this is to NOT print the flex cup. They used a wide double
> side timing belt for
On Tuesday 26 January 2021 12:24:02 andy pugh wrote:
> On Tue, 26 Jan 2021 at 04:47, Sam Sokolik wrote:
> > I am sure the torque is limited - but I feel it might have
> > possibility...
>
> It might be worth trying the style without a cup.
> You have two internally toothed gears and a
On Tue, 2021-01-26 at 10:31 -0600, brainf...@posteo.net wrote:
> who is using a digitizing tablet
> what are you using
> advice using it with linux
Debian has drivers for the Wacom tablets.
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The weak link on all 3D printed harmonic drives is the flex cup. The
plastic fails after some hours of use.The best design I've seen to
overcome this is to NOT print the flex cup. They used a wide double side
timing belt for the inner teeth.
The thing that very few You tubers do when
andy - that seems like a neat experiment... Do you have an example of the
HD version?
On Tue, Jan 26, 2021 at 11:26 AM andy pugh wrote:
> On Tue, 26 Jan 2021 at 04:47, Sam Sokolik wrote:
> >
> > I am sure the torque is limited - but I feel it might have possibility...
>
> It might be worth
On Tue, 26 Jan 2021 at 04:47, Sam Sokolik wrote:
>
> I am sure the torque is limited - but I feel it might have possibility...
It might be worth trying the style without a cup.
You have two internally toothed gears and a double-height flex-spline.
The gears have 202 and 200 teeth, the
On Tuesday 26 January 2021 06:00:46 Sven Wesley wrote:
> Den tis 26 jan. 2021 kl 05:47 skrev Sam Sokolik :
> > I am sure the torque is limited - but I feel it might have
> > possibility...
> >
> > https://www.youtube.com/watch?v=QlpkmEEhFqc
>
> I can totally see that drive on my home made
who is using a digitizing tablet
what are you using
advice using it with linux
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I was just wondering if there were any examples of how the GRAFCET programming
might be used in Classiclader. Thought that if I saw how it might be used I
might then understand exactly what it was then. And if any one had actually
used it with Linuxcnc to know that it actually works with our
I could probably make the outside gear pretty easy by shaping it on a mill
and rotary table. Or make version .1 with both plastic gears then use it
to make the outside gear. (outside - as in the non-flex one)
On Tue, Jan 26, 2021 at 5:03 AM Sven Wesley wrote:
> Den tis 26 jan. 2021 kl 05:47
On Tue, 26 Jan 2021 at 06:07, Dave Cole wrote:
>
> Do you mean writing a sequencer in Classic Ladder?
> As in step logic?
CL supports state based sequential logic, using GRAFCET.
http://www.linuxcnc.org/docs/2.5/html/ladder/classic_ladder_es.html#_grafcet_programming
There are some
Den tis 26 jan. 2021 kl 05:47 skrev Sam Sokolik :
> I am sure the torque is limited - but I feel it might have possibility...
>
> https://www.youtube.com/watch?v=QlpkmEEhFqc
>
>
I can totally see that drive on my home made trunnion table!
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