> Cc: fxkl4...@protonmail.com
> Subject: Re: [Emc-users] Harmonic Drive
>
> On Mon, 3 Jan 2022, John Dammeyer wrote:
>
> > Just go back on this subject to older postings from Todd where he posted
> > the FreeCAD files. I then used those to create step files
> and loaded the
middle section and
slip a bearing onto each side. A lot easier than trying to make a bearing
spacer.
> -Original Message-
> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> Sent: January-03-22 10:53 AM
> To: Enhanced Machine Controller (EMC)
> Subject:
Large ring bearings are not crazy-expensive. I was thinking about using
some in a robot leg design. This one could work for your size reduction
drive. Use them in pairs spaced as far apart as possible. They are deep
groove so they can take some axial load. With wide enough spacing you
don't
; But the above example doesn't have bearings inside the planets either so it's
> plastic on plastic. I can provide the step files if you wish.
>
> John
>
>
>
>
>> -Original Message-----
>> From: grumpy via Emc-users [mailto:emc-users@lists.sourceforge.net]
nuary-03-22 4:44 AM
> To: Enhanced Machine Controller (EMC)
> Cc: grumpy
> Subject: Re: [Emc-users] Harmonic Drive
>
> January 3, 2022 9:54:10 AM CET John Dammeyer wrote:
> For fun I created Todd's version with 0.5module gears. The OD of the assembly
> is now 60mm compa
January 3, 2022 9:54:10 AM CET John Dammeyer wrote:
For fun I created Todd's version with 0.5module gears. The OD of the assembly
is now 60mm compared to 150mm. It would now be possible to choose a far east
harmonic drive tapered roller assembly to hold the driven gear in place.
Although they
On Mon, 3 Jan 2022 at 08:57, John Dammeyer wrote:
>
> and then some sort of broaching/indexing to create the two ring gears
Have you seen: https://youtu.be/VJOem40ggkI?t=1167
(Home-shop gear skiving)
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the
For fun I created Todd's version with 0.5module gears. The OD of the assembly
is now 60mm compared to 150mm. It would now be possible to choose a far east
harmonic drive tapered roller assembly to hold the driven gear in place.
Although they are expensive.
Not sure what type of bearings,
On Wednesday, December 29, 2021 8:31:49 PM EST John Dammeyer wrote:
> Small progress report on Todd's version of the harmonic drive.
>
> I added a back mount that holds a 19x40x12 bearing. A cap to hold the
> bearing in place. Then a new drive arm sized to 19mm and a 19x1.25mm
> thread along
Small progress report on Todd's version of the harmonic drive.
I added a back mount that holds a 19x40x12 bearing. A cap to hold the bearing
in place. Then a new drive arm sized to 19mm and a 19x1.25mm thread along
with a nut. The end of the drive shaft has an 8mm hole for the stepper
On Wednesday, December 22, 2021 8:20:10 PM EST John Dammeyer wrote:
> Here's a bit of an addendum with respect to the HGD_EWG version. The wheels
> are mounted on an ellipse and as close as possible to each other.
> http://www.autoartisans.com/harmonicdrive/HarmonicDrive-29.jpg
> They are just
On Wednesday, December 22, 2021 7:57:56 PM EST John Dammeyer wrote:
> Hi Gene,
>
> > From: gene heskett [mailto:ghesk...@shentel.net]
> >
> > On Wednesday, December 22, 2021 12:45:11 PM EST John Dammeyer wrote:
> > > > From: gene heskett [mailto:ghesk...@shentel.net]
> > > >
> > > > On
Here's a bit of an addendum with respect to the HGD_EWG version. The wheels
are mounted on an ellipse and as close as possible to each other.
http://www.autoartisans.com/harmonicdrive/HarmonicDrive-29.jpg
They are just close enough to create zero backlash across the opposite wheels
which hold
On Wednesday, December 22, 2021 12:45:11 PM EST John Dammeyer wrote:
> > From: gene heskett [mailto:ghesk...@shentel.net]
> >
> > On Wednesday, December 22, 2021 4:24:30 AM EST John Dammeyer wrote:
> > > Here's the 140 Tooth cup and 147 Spline for a 20:1 ratio with 0.5 module
> >
> > That's a
On Wed, Dec 22, 2021 at 1:27 AM John Dammeyer
wrote:
>
>
> I'm going to try and reprint the cup with random layer changes to try and
> get rid of the bump. Should be able to mount it into the existing box and
> lid and try it out.
>
>
>
Are you looking for things like this before you print or
> From: gene heskett [mailto:ghesk...@shentel.net]
>
> On Wednesday, December 22, 2021 4:24:30 AM EST John Dammeyer wrote:
> > Here's the 140 Tooth cup and 147 Spline for a 20:1 ratio with 0.5 module
>
> That's a rule violation for a two point drive, the count diff must be a power
> of 2.
On Wednesday, December 22, 2021 4:24:30 AM EST John Dammeyer wrote:
> Here's the 140 Tooth cup and 147 Spline for a 20:1 ratio with 0.5 module
That's a rule violation for a two point drive, the count diff must be a power
of 2. For a triangular wave with three bearings, a diff of 3 is required to
Here's the 140 Tooth cup and 147 Spline for a 20:1 ratio with 0.5 module gear
teeth. No backlash in fact a bit tight. ID of cup is 68.5mm so a bit smaller
than the original one (82mm ID) with the big teeth and 1.25 module (36:1).
Only problem is the cup gear layer changes were all in one
Soaking the plaster of paris encased part in sodium bicarb in water
should dissolve the POP. Use as much bicarb as the weight of the plaster
of paris. I've not tried this so YMMV. ;-)
Dave
On 12/21/21 1:34 AM, Gregg Eshelman via Emc-users wrote:
One method of strengthening 3D printed
From: John Dammeyer [jo...@autoartisans.com]
Sent: Monday, December 20, 2021 10:53 PM
To: 'Enhanced Machine Controller (EMC)'
Subject: Re: [Emc-users] Harmonic Drive
CAUTION: This email originated from outside the Walla Walla University email
system.
I installed Gene's CAD program and ex
and
available torque if end torque is the most important.
John
> -Original Message-
> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> Sent: December-20-21 3:06 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> I got the
One method of strengthening 3D printed plastic is to pack the item very firmly
in very finely ground salt then heat it just the point where the plastic begins
to melt. The firm salt keeps the size and shape and the plastic layers melt
together more. It only work on parts with 100% infill. Can
> From: John Dammeyer [mailto:jo...@autoartisans.com]
>
> I'm headed in the other direction since I'd like LCNC to make it. First I
> have to reprint the ring gear though. Would be much smarter
> to actually make it with 142 teeth instead of 140. I'll try a different
> filament. That will
son.ch...@gmail.com]
> Sent: December-20-21 10:29 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> On Mon, Dec 20, 2021 at 5:35 PM gene heskett wrote:
>
> > On Monday, December 20, 2021 7:03:21 PM EST John Dammeyer wrote:
> > >
On Mon, Dec 20, 2021 at 5:35 PM gene heskett wrote:
> On Monday, December 20, 2021 7:03:21 PM EST John Dammeyer wrote:
> > Perhaps save it as a step file or iges. I can't read that scad file.
>
> I don't think it can output those non-free formats.
>
STEP is an ISO standard and
IGES is a U.S.
if they have new methods).
-- Ralph
From: gene heskett [ghesk...@shentel.net]
Sent: Monday, December 20, 2021 5:32 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Harmonic Drive
On Monday, December 20, 2021 7:03:21 PM EST John Dammeyer wrote
l Message-
> > From: gene heskett [mailto:ghesk...@shentel.net]
> > Sent: December-20-21 3:10 PM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] Harmonic Drive
> >
> > On Monday, December 20, 2021 1:49:18 PM EST Chris Albertson wrote:
>
Perhaps save it as a step file or iges. I can't read that scad file.
> -Original Message-
> From: gene heskett [mailto:ghesk...@shentel.net]
> Sent: December-20-21 3:10 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> On Mond
On Monday, December 20, 2021 1:49:18 PM EST Chris Albertson wrote:
> Yes, he used maybe 30 pounds of metal parts. And I only saw a few degrees
> of rotation in the video, run it for 100 hours and see what happens. Flex
> is what kills the plastic so after 100 hours it will have had a few
I got the idea to post process the gears with heat when I was experimenting
with brass inserts. They make this tool for installing inserts. One end
is turned to fit the insert the other is turned to exactly fit my
temperature control solder iron. I set the iron for 180C and the insert
is
age-
> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> Sent: December-20-21 1:56 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> Is it possible to post process a thermal plastic gear? Lets say you took
> a high-precision metal ge
> Sent: December-20-21 2:11 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> So I imagine it is possible to post-process a thermal plastic gear, but at
> that point, maybe it�d be better to set up a gear skiving
> machine to make the
So I imagine it is possible to post-process a thermal plastic gear, but at that
point, maybe it’d be better to set up a gear skiving machine to make the flex
rings. If you can get the cutter and angle a rotary axis with respect to the
spindle, you should be able to do it without much hassle.
cup. Perhaps if the 1.25module cup also had 140T and
> the larger diameter it also wouldn't flex as sharply. And therefore less
> chance of cracking.
>
> > -Original Message-
> > From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> > Sent: December-20-
On Mon, Dec 20, 2021 at 11:23 AM Andrew wrote:
>
> > Has anyone tried DLP/SLA printed flex splines?
>
Thinking more along those lines, There are printers that can print metal
parts.
They are expensive but if you only need one or two parts Shapeways can print
them for you. They offer to print
a pretty crappy 3D printer.
John
> -Original Message-
> From: John Dammeyer [mailto:jo...@autoartisans.com]
> Sent: December-20-21 1:01 PM
> To: 'Enhanced Machine Controller (EMC)'
> Subject: Re: [Emc-users] Harmonic Drive
>
> As an experiment, now that I've modified
as sharply. And therefore less chance of cracking.
> -Original Message-
> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> Sent: December-20-21 10:22 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> On Fri, Dec 17, 2021 a
Yes - because I cannot easily make the harmonic drive out of metal.. Hence
the 3d printed bits. I have run it for 24 hours at about 700 rpm.. The
gears still look good. You are engaging a substantial amount of teeth - I
think errors are probably pretty minimal. I could certainly throw a high
пн, 20 груд. 2021 р. о 20:26 Chris Albertson:
> Finally ANY flexing at all is the death of printed parts. They fail by the
> failure of interlayer adhesion. Think of printed plastic like it is soft
> pine wood. When making gears from yellow pine, the direction of the grain
> matters a lot and
Yes, he used maybe 30 pounds of metal parts. And I only saw a few degrees
of rotation in the video, run it for 100 hours and see what happens. Flex
is what kills the plastic so after 100 hours it will have had a few million
cycles. But still it is 99% made of metal.
I want to see a 100%
Did you watch this video til the end? I time stamped it.
https://youtu.be/eW1GGI55Epc?t=878
sam
On Mon, Dec 20, 2021 at 12:26 PM Chris Albertson
wrote:
> On Fri, Dec 17, 2021 at 6:05 PM Sam Sokolik wrote:
>
> > Hmm - seems we are making things a bit more complicated than they need to
> >
On Fri, Dec 17, 2021 at 6:05 PM Sam Sokolik wrote:
> Hmm - seems we are making things a bit more complicated than they need to
> be.. Why didn't the simple flex gear work ok? You need to make the
> system with fine enough splines that the flexure is at a minimum...You
> can lower the
on ratio).
>
> John
>
>
> > -Original Message-
> > From: John Dammeyer [mailto:jo...@autoartisans.com]
> > Sent: December-17-21 3:43 PM
> > To: 'Enhanced Machine Controller (EMC)'
> > Subject: Re: [Emc-users] Harmonic Drive
> >
> >
Send me the photos then. I'll create a folder on my web site for these.
John
> -Original Message-
> From: gene heskett [mailto:ghesk...@shentel.net]
> Sent: December-17-21 9:15 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
>
On Friday, December 17, 2021 11:39:00 PM EST John Dammeyer wrote:
> Gene,
> I've found the forum doesn't allow through more than about 135K. Which is
> why I've been posting links to the bigger ones on my web site. There are
> lots of photo box sites for this sort of thing.
And 95% of them
Gene,
I've found the forum doesn't allow through more than about 135K. Which is why
I've been posting links to the bigger ones on my web site.
There are lots of photo box sites for this sort of thing. A picture is really
worth 1000 words or more.
John
> > Seemed and ideal size for a bearing
On Friday, December 17, 2021 8:43:37 PM EST John Dammeyer wrote:
> Alright. So it spins really freely but keeping the planetary cluster
> centred is a bit of an issue. So the attached photo shows roughly (very
> roughly) what I had in mind.
>
> With the right coupler between the motor and the
Hmm - seems we are making things a bit more complicated than they need to
be.. Why didn't the simple flex gear work ok? You need to make the
system with fine enough splines that the flexure is at a minimum...You
can lower the backlash to a minimum by applying a small amount of
pressure to
Alright. So it spins really freely but keeping the planetary cluster centred
is a bit of an issue. So the attached photo shows roughly (very roughly) what
I had in mind.
With the right coupler between the motor and the gear cluster the planetary
assembly should stay in the same place. There
On Friday, December 17, 2021 7:11:42 PM EST John Dammeyer wrote:
> And now with the 40T and 41T labels on each gear it was possible to spin
> them on the mount so they were all in the same orientation and I then
> constrained one mount hole on each. Then repositioned the teeth and the
> two
).
John
> -Original Message-
> From: John Dammeyer [mailto:jo...@autoartisans.com]
> Sent: December-17-21 3:43 PM
> To: 'Enhanced Machine Controller (EMC)'
> Subject: Re: [Emc-users] Harmonic Drive
>
> Here are screen shots of my drawings as imported from t
troller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> Here is a better image with the clocking points marked on the pinions to
> better illustrate what I mean.
>
> Andy, I think what you are describing is what I did with my first drawing
> (with four sets of planet
December-17-21 8:10 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> Here is a better image with the clocking points marked on the pinions to
> better illustrate what I mean.
>
> Andy, I think what you are describing is wh
On Fri, 17 Dec 2021 at 15:27, Todd Zuercher wrote:
>
> Andy, Initially I thought what you are saying about the pitch diameters
> needing to be the same was true. And that would be the case if all the
> pinions had the same tooth count and size. But When I was modeling it I
> found that if
On Friday, December 17, 2021 3:02:19 AM EST John Dammeyer wrote:
> Gene,
> You were asking for a photo of front and back. I put them here because they
> are too large to attach to an email.
> http://www.autoartisans.com/harmonicdrive/GearSide1.jpg
>
On Fri, 17 Dec 2021 at 08:06, John Dammeyer wrote:
> Add the second though and there doesn't seem to be any clear position where
> the second just drops down onto the secondary planet gears. It's always a
> force fit. Either there's a key where it can go together just so perfectly
> or it's
On Thu, 16 Dec 2021 at 07:57, John Dammeyer wrote:
> The AlibreCAM Gear generator doesn't accept module. Instead it wants number
> of teeth and pitch diameter.
> So I whipped up a spreadsheet that converts say the module 1.25 that Todd
> used and chose 19 teeth for the sun gear. That appears
> -Original Message-
> From: gene heskett [mailto:ghesk...@shentel.net]
> Sent: December-16-21 4:39 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> On Thursday, December 16, 2021 5:03:10 PM EST John Dammeyer wrote:
> > > Fr
On Thursday, December 16, 2021 5:03:10 PM EST John Dammeyer wrote:
> > From: gene heskett [mailto:ghesk...@shentel.net]
> > Subject: Re: [Emc-users] Harmonic Drive
> >
> > On Thursday, December 16, 2021 1:10:30 PM EST John Dammeyer wrote:
> > > A pencil line on
ists.sourceforge.net]
> Sent: December-16-21 3:20 PM
> To: Enhanced Machine Controller (EMC)
> Cc: Gregg Eshelman
> Subject: Re: [Emc-users] Harmonic Drive
>
> Dunno why every CAD program with a gear wizard, generator etc doesn't do
> both. https://evolventdesign.com/pages/pitc
On Thursday, December 16, 2021 5:03:12 PM EST Todd Zuercher wrote:
> The pinion pairs are 1 tooth different in size (40 and 41). I think If I
> were printing them I would print them as one piece instead of screwing them
> together. All three sets of pinions on the triple pinion design, would use
1 8:22 PM
> To: Enhanced Machine Controller (EMC)
> Cc: Gregg Eshelman
> Subject: Re: [Emc-users] Harmonic Drive
>
> Does FreeCAD's gear wizard support both Diametral Pitch and Module gears now?
>
>
> On Wednesday, December 15, 2021, 04:36:00 PM MST, John Dammeyer
> wr
Zuercher
P. Graham Dunn Inc.
630 Henry Street
Dalton, Ohio 44618
Phone: (330)828-2105ext. 2031
-Original Message-
From: gene heskett
Sent: Thursday, December 16, 2021 3:48 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Harmonic Drive
[EXTERNAL EMAIL] Be sure link
uter rings
only?
Thanks John. I am encouraged to see if I can make a smaller one when my
printer is working again.
>
> > -Original Message-
> > From: Todd Zuercher [mailto:to...@pgrahamdunn.com]
> > Sent: December-16-21 8:19 AM
> > To: Enhanced Machine Controller
P. Graham Dunn Inc.
630 Henry Street
Dalton, Ohio 44618
Phone: (330)828-2105ext. 2031
-Original Message-
From: John Dammeyer
Sent: Thursday, December 16, 2021 2:54 AM
To: 'Enhanced Machine Controller (EMC)'
Subject: Re: [Emc-users] Harmonic Drive
[EXTERNAL EMAIL] Be sure link
On Thursday, December 16, 2021 6:50:01 AM EST grumpy via Emc-users wrote:
> this man's work might be helpful
> https://www.youtube.com/c/Skyentific
I don't see a dl link, so I assume he is selling it if you join his support
channel?
But while its nice, its too big. The crossed rollers for
this man's work might be helpful
https://www.youtube.com/c/Skyentific
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
an via Emc-users [mailto:emc-users@lists.sourceforge.net]
> Sent: December-15-21 8:22 PM
> To: Enhanced Machine Controller (EMC)
> Cc: Gregg Eshelman
> Subject: Re: [Emc-users] Harmonic Drive
>
> Does FreeCAD's gear wizard support both Diametral Pitch and Module gears now?
> From: Gregg Eshelman via Emc-users [mailto:emc-users@lists.sourceforge.net]
>
> Does FreeCAD's gear wizard support both Diametral Pitch and Module gears now?
>
Doesn't look like it based on the menu I've attached here.
John
>
> On Wednesday, December 15, 2021, 04:36:00 PM MST, John
Does FreeCAD's gear wizard support both Diametral Pitch and Module gears now?
On Wednesday, December 15, 2021, 04:36:00 PM MST, John Dammeyer
wrote:
I still haven't been able to make a simple circle in FreeCAD. I keep looking
for the Alibre way of doing it which for my brain has
Hi Gene,
Not sure about why a 4 pinion is any better than 3. Also now, as I research
more Youtube videos, which I should have done before I started printing, is
whether Todd's model was complete.
https://youtu.be/-VtbSvVxaFA
Seems like all the others use a sun gear in the middle driven by the
On Wednesday, December 15, 2021 6:31:21 PM EST John Dammeyer wrote:
> I still haven't been able to make a simple circle in FreeCAD. I keep
> looking for the Alibre way of doing it which for my brain has always been
> close to perfect. Never could use AutoCAD and I find Fusion360 confusing .
>
> -Original Message-
> From: Todd Zuercher [mailto:to...@pgrahamdunn.com]
> Sent: December-15-21 1:10 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> That is the 2nd version posted on 12/14/2021. The first version I posted on
> 12/3/2021
Wednesday, December 15, 2021 2:00 PM
To: 'Enhanced Machine Controller (EMC)'
Subject: Re: [Emc-users] Harmonic Drive
[EXTERNAL EMAIL] Be sure links are safe.
Yikes. Versions? I thought there was only one version.
Outer gears are the same OD, have different ID. Pinion gears are different
dia
m: Todd Zuercher [mailto:to...@pgrahamdunn.com]
> Sent: December-15-21 6:32 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> No reason, just picked a number, and that looked good to me.
>
> Which version are you trying to print? The ones wi
. Graham Dunn Inc.
630 Henry Street
Dalton, Ohio 44618
Phone: (330)828-2105ext. 2031
-Original Message-
From: John Dammeyer
Sent: Tuesday, December 14, 2021 6:53 PM
To: 'Enhanced Machine Controller (EMC)'
Subject: Re: [Emc-users] Harmonic Drive
[EXTERNAL EMAIL] Be sure links are safe
nced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> It is a Freecad file, you have to open it with Freecad. (If I double click
> on it in a file manager on a Linux pc I get that list to.)
>
> Todd Zuercher
> P. Graham Dunn Inc.
> 630 Henry Street
>
: Tuesday, December 14, 2021 1:53 PM
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Harmonic Drive
[EXTERNAL EMAIL] Be sure links are safe.
On Tue, 14 Dec, 2021 at 1:07 PM, Todd Zuercher wrote:
To: enhanced machine controller (emc)
The "pinned&quo
On Tue, 14 Dec, 2021 at 1:53 PM, John Dammeyer wrote:
To: 'enhanced machine controller (emc)'
Gene
Reading through my copy of "Gears and Gear Cutting" by Ivan Law (#19 in the
workshop practice series) and some more research suggests that since both the
cup and the ring gear should have over
for
6101 and 6103 bearings to arrive. Most of the parts will be made from metal.
John Dammeyer
> -Original Message-
> From: Todd Zuercher
> [mailto:to...@pgrahamdunn.com<mailto:to...@pgrahamdunn.com>]
> Sent: December-03-21 8:37 AM
> To: Enhanced Machine Controller
at arrives this project is on hold.
John
> -Original Message-
> From: Gene Heskett [mailto:ghesk...@shentel.net]
> Sent: December-14-21 2:09 AM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Harmonic Drive
>
> On Tue, 14 Dec, 2021 at 12
ighth inch tool doing 20k certainly opens up lots of
possibilities. :o)
> -Original Message-
> From: Todd Zuercher
> [mailto:to...@pgrahamdunn.com<mailto:to...@pgrahamdunn.com>]
> Sent: December-03-21 8:37 AM
> To: Enhanced Machine Controller (EMC)
>
metal.
John Dammeyer
> -Original Message-
> From: Todd Zuercher [mailto:to...@pgrahamdunn.com]
> Sent: December-03-21 8:37 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> It was easier to model in Freecad than I expected.
Machine Controller (EMC)
Subject: Re: [Emc-users] Harmonic Drive
[EXTERNAL EMAIL] Be sure links are safe.
> On 2 Dec 2021, at 21:14, Todd Zuercher wrote:
>
> What if you used two outer ring gears of the same diameter one with one
> fewer teeth. Then have 4 sets of planetar
On Thu, 2 Dec, 2021 at 6:41 PM, Andy Pugh wrote:
To: enhanced machine controller (emc)
> On 2 Dec 2021, at 21:14, Todd Zuercher
> mailto:to...@pgrahamdunn.com>> wrote:
>
> What if you used two outer ring gears of the same diameter one with one
> fewer teeth. Then have 4 sets of
> On 2 Dec 2021, at 21:14, Todd Zuercher wrote:
>
> What if you used two outer ring gears of the same diameter one with one
> fewer teeth. Then have 4 sets of planetaries stacked in pairs. Each pair
> would be pinned together
You can just use pinions twice as long as the ring gears. I
of the other disk.
And we're back to a small contact area.
John
> -Original Message-
> From: John Dammeyer [mailto:jo...@autoartisans.com]
> Sent: December-02-21 11:33 AM
> To: 'Enhanced Machine Controller (EMC)'
> Subject: Re: [Emc-users] Harmonic Drive
>
> Half
area.
John
> -Original Message-
> From: John Dammeyer [mailto:jo...@autoartisans.com]
> Sent: December-02-21 11:33 AM
> To: 'Enhanced Machine Controller (EMC)'
> Subject: Re: [Emc-users] Harmonic Drive
>
> Half size won't quite work if you want a stub lining up with th
To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> Yes, 16 mm bearing can't help. I think what would be best is to use two
> bearing and make them half the diameter of the inside of the cup. That
> would be the largest possible size that would sti
:samco...@gmail.com]
> Sent: December-02-21 4:51 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> That bearing was picked because it is a common wheel bearing you can get
> pretty cheap. (Double ball bearing). Plus you can pop it apart and gr
Yes, 16 mm bearing can't help. I think what would be best is to use two
bearing and make them half the diameter of the inside of the cup. That
would be the largest possible size that would still fit.
That said, why not make a large size bearing from a small one by slipping a
plastic disk over
ow you lock it onto the shaft.
>
> John
>
>
>
>
> > -Original Message-
> > From: Sam Sokolik [mailto:samco...@gmail.com]
> > Sent: December-01-21 8:50 PM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] Harmonic Drive
> &g
mber-01-21 8:50 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> I have seen that video too! I watch too much youtube.. It doesn't really
> look that strong..mine stalled at 35ftlb or 47.45Nm
>
> Oh - I am off
figure out how you lock it onto the shaft.
John
> -Original Message-
> From: Sam Sokolik [mailto:samco...@gmail.com]
> Sent: December-01-21 8:50 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> I have seen that video too! I w
Broke the first cup. It's possible that a few times I didn't insert it right
because the holes didn't line up well so I might well have begun the crack
which then escalated. If it's inserted off axis it's hard to get it into
position and if it even turns is very rough. Get it right and it's
mbly.
> >
> > But separately they can be edited. Probably a bug in Alibre. They don't
> > call it Read Only or Read/Write but locked and unlocked.
> >
> > John
> >
> >
> > > -----Original Message-
> > > From: Chris Albertson [mailto:albertso
gt;
> John
>
>
> > -Original Message-
> > From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> > Sent: December-01-21 2:59 PM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] Harmonic Drive
> >
> > If i
troller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> The problem (I think) is that you want to deform the plastic as little as
> possible. That is why I went with smaller teeth... (and no cup)
>
> sam
>
> On Wed, Dec 1, 2021 at 3:22 PM Chris Albertson
> wrote:
>
Gene Heskett
> -Original Message-
> From: Gene Heskett [mailto:ghesk...@shentel.net]
> Sent: December-01-21 4:43 PM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Harmonic Drive
>
> still a 404
>
>
> On Wed, 1 Dec, 2021 at
ginal author.
>
> John
>
>
>
> > -Original Message-
> > From: Gene Heskett [mailto:ghesk...@shentel.net ghesk...@shentel.net>]
> > Sent: December-01-21 4:10 PM
> > To: emc-users@lists.sourceforge.net emc-users@lists.sourceforge.net>
> >
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