H2000-AC-SER
> VO-ACTUATOR/232535240729?hash=item36242e3019:g:4bAAAOSwXrdZ7vsm
>
> John
>
>
>
> > -Original Message-
> > From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> > Sent: December-21-17 1:38 PM
> > To: Enhanced Machine Controller (EMC)
> &g
UATOR/232535240729?hash=item36242e3019:g:4bAAAOSwXrdZ7vsm
John
> -Original Message-
> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> Sent: December-21-17 1:38 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Off topic: wolfrom drive
>
> Bu
Buying on eBay means waiting, checking every few days and waiting. But you
do eventually find one.
Part numbers and specs here:
http://www.harmonicdrive.net/_hd/content/documents/hpg-catalog.pdf
About 15 second into this he tells you how to read part numbers
https://youtu.be/mmOnktzifeg?t=1m33s
On 21 December 2017 at 20:34, Gene Heskett wrote:
> And the $170 version seems to be guts only, without the internal rack.
> Maybe I'm to be considered dumb because I don't know them from long
> familiarity with using them, but so is assuming everyone has a pile of
> makers catalogues reaching ba
On Thursday 21 December 2017 12:39:16 Chris Albertson wrote:
> On Thu, Dec 21, 2017 at 2:12 AM, Gene Heskett
wrote:
> > On Thursday 21 December 2017 04:18:46 Chris Albertson wrote:
> > > To make this really work for rotary tables you need a very fine
> > > pitch. I have seen these 3D printed in
Sorry, here is the video https://youtu.be/dLNDGUISTYM?t=9m38s
NOTICE. We see the first set of planetary gears THEN the guy reaches over
and picks up the SECOND set of sun/planet gears and shows how the assemble
onto the shaft.The neat part about Toyota design is ease of
assembly./disassembly.
On Thu, Dec 21, 2017 at 2:12 AM, Gene Heskett wrote:
> On Thursday 21 December 2017 04:18:46 Chris Albertson wrote:
>
> > To make this really work for rotary tables you need a very fine pitch.
> > I have seen these 3D printed in plastic but they slip and don't
> > handle much torque because the
The issue I see is how to machine this so that it fits "perfectly" so as to
have zero backlash.
An alternative might be to have three sets of planetary gears with some
sort of spring loading so as to take out the "slop."
Ken
On Thu, Dec 21, 2017 at 5:21 AM, Gene Heskett wrote:
> On Thursday 2
On 21 December 2017 at 03:36, Gene Heskett wrote:
> Grumpy's video is now on my site in the sig, with a link from the front
> page. Enjoy. Sure, its only plywood, but it works as a proof of
> concept. I may see if I can make one in steel, with bearings.
A useful source of components might be bi
On Thursday 21 December 2017 04:47:46 Roland Jollivet wrote:
> The video shows only one planetary gear, which is obviously two gears,
> stacked.
>
> Can there be three planetary gears, maybe each with a different
> top/bottom offset?
> I can't figure out if it would work, or just jam up?
>
I think
On Thursday 21 December 2017 04:18:46 Chris Albertson wrote:
> To make this really work for rotary tables you need a very fine pitch.
> I have seen these 3D printed in plastic but they slip and don't
> handle much torque because the outer ring deforms
> One idea I had was to press fit the plastic
The video shows only one planetary gear, which is obviously two gears,
stacked.
Can there be three planetary gears, maybe each with a different top/bottom
offset?
I can't figure out if it would work, or just jam up?
On 21 December 2017 at 11:18, Chris Albertson
wrote:
> To make this really wo
To make this really work for rotary tables you need a very fine pitch. I
have seen these 3D printed in plastic but they slip and don't handle much
torque because the outer ring deforms
One idea I had was to press fit the plastic ring gear into a short section
of steel pipe.
Put you can buy these
That's great. How is it built and of what materials. You can always post
a video to You Tube
On Wed, Dec 20, 2017 at 9:36 AM, wrote:
> I got my first prototype working. It came out to be 60:1.
> sun = 15
> first planet = 15
> first ring = 45
> second planet = 14
> second ring = 45
> I have a
very cool Gene had some troubles playing the video, but I seem to
have the gist of it. It does seem like a very interesting design for
rotary tables just have to figure out how to re-purpose some rear
end ring gears and pinions hmmm... was thinking of regearing the
jeep anyway!.
La
On 21 December 2017 at 05:36, Gene Heskett wrote:
> On Wednesday 20 December 2017 15:06:20 Gene Heskett wrote:
>
> > On Wednesday 20 December 2017 12:36:57 gru...@manlymail.net wrote:
> > > I got my first prototype working. It came out to be 60:1.
> > > sun = 15
> > > first planet = 15
> > > firs
On Wednesday 20 December 2017 15:06:20 Gene Heskett wrote:
> On Wednesday 20 December 2017 12:36:57 gru...@manlymail.net wrote:
> > I got my first prototype working. It came out to be 60:1.
> > sun = 15
> > first planet = 15
> > first ring = 45
> > second planet = 14
> > second ring = 45
> > I hav
On Wednesday 20 December 2017 12:36:57 gru...@manlymail.net wrote:
> I got my first prototype working. It came out to be 60:1.
> sun = 15
> first planet = 15
> first ring = 45
> second planet = 14
> second ring = 45
> I have a short video but can not post it here
>
Need more details plz. Like did
I got my first prototype working. It came out to be 60:1.
sun = 15
first planet = 15
first ring = 45
second planet = 14
second ring = 45
I have a short video but can not post it here
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I have a collection of harmonic drives from a robot. Making a 4th axis has
been on the list for a long time. The drives aren't exactly in a easily
usable format, unfortunately.
On Sat, Dec 16, 2017 at 10:09 AM, andy pugh wrote:
> On 16 December 2017 at 04:10, Chris Albertson
> wrote:
> > If
On 16 December 2017 at 04:10, Chris Albertson wrote:
> If you can find an FHA drive then the servo and a very serious
>> crossed-roller gear is included.
>> http://bodgesoc.blogspot.co.uk/2017/05/harmonic.html
>
>
> The guy who made the above video said he bought the 4" diameter harmonic
> drive o
If you can find an FHA drive then the servo and a very serious
> crossed-roller gear is included.
> http://bodgesoc.blogspot.co.uk/2017/05/harmonic.html
The guy who made the above video said he bought the 4" diameter harmonic
drive on eBay for about $200. I checked just now and there are a LOT o
Internal gears can be rotary broached. It uses a tool similar to what's on that
shaper but both tool and gear blank are rotating pretty quick. Takes just one
pass. Splines can be cut the same way.
On Friday, December 15, 2017, 4:19:44 AM MST, andy pugh
wrote:
But I use the hobbing method
Gene, just don't worry about failure on these. These are aerospace grade
machines and you buy them cheap on eBay. Even if they did fail it is not a
safety issue. You just say "It broke" and fix it.
The other parts I found on eBay are worm and wheels. They are already
machined for connecting t
On Friday 15 December 2017 14:20:27 Chris Albertson wrote:
> If the goal to build a zero backlash rotary table the gold standard is
> a "harmonic drive". These are simpler designs that are inherently
> near zero backlash, typically at the arc second level. It works on a
> similar principle -- a
On 15 December 2017 at 19:20, Chris Albertson wrote:
> THIS is the project I want to copy https://youtu.be/mmOnktzifeg and here
> is part 2 https://youtu.be/xaEhkF9S0mY Excelent videos
If you can find an FHA drive then the servo and a very serious
crossed-roller gear is included.
http://bodges
On Friday 15 December 2017 13:41:12 andy pugh wrote:
> On 15 December 2017 at 18:25, Gene Heskett
wrote:
> >> https://www.youtube.com/watch?v=VrvwlPxRhKU
> >
> > This one looks as if it could be made with a drill bit, if it didn't
> > wander, and the tapered gibs would seem to allow zero backlas
If the goal to build a zero backlash rotary table the gold standard is a
"harmonic drive". These are simpler designs that are inherently near zero
backlash, typically at the arc second level. It works on a similar
principle -- a ring gear and another gear with one less tooth. These
devices just
On 15 December 2017 at 18:25, Gene Heskett wrote:
>> https://www.youtube.com/watch?v=VrvwlPxRhKU
>
> This one looks as if it could be made with a drill bit, if it didn't
> wander, and the tapered gibs would seem to allow zero backlash.
That was the idea, drill the holes, turn away half of the ho
On Friday 15 December 2017 11:21:28 andy pugh wrote:
> On 15 December 2017 at 13:04, wrote:
> > While I am asking off topic questions does anyone know if the specs
> > for designing a Grisson gear drive are available? These look very
> > cool. https://www.maul-konstruktionen.de/eng/grissongetrie
If you want to machine, not print the gears then I'd think then if you have
4 axis CNC you could just route the internal teeth with a straight end
mill. The trouble is the minimum radius is the size of the end mill and
you need a really tiny end mill to make the last finish pass. But if
you cu
On Friday 15 December 2017 11:11:32 John Kasunich wrote:
> On Fri, Dec 15, 2017, at 06:16 AM, andy pugh wrote:
> > If you look at stock internal gears:
> > http://www.hpcgears.com/pdf_c33/17.7.pdf
> > You will find that getting a pair that differ by only one tooth
> > isn't that easy. And they wil
or this?
https://www.dropbox.com/s/zcew9qfv98kcgrn/testgear.AVI?dl=0
On Fri, Dec 15, 2017 at 11:05 AM, wrote:
> That does sound interesting
> If I have permission to use your design I may try to make one of those
>
>
> Quoting John Kasunich :
>
> On Fri, Dec 15, 2017, at 06:16 AM, andy pugh wr
That does sound interesting
If I have permission to use your design I may try to make one of those
Quoting John Kasunich :
On Fri, Dec 15, 2017, at 06:16 AM, andy pugh wrote:
If you look at stock internal gears:
http://www.hpcgears.com/pdf_c33/17.7.pdf
You will find that getting a pair that d
Sorry, not that one exactly
Like this
https://www.youtube.com/watch?v=7rpuiDkh1SA
Quoting andy pugh :
On 15 December 2017 at 16:39, wrote:
I have already made that one
The one in my Youtube video?
Does it work?
It is something I invented. But I have no idea if I invented it first ;-)
--
On 15 December 2017 at 16:39, wrote:
> I have already made that one
The one in my Youtube video?
Does it work?
It is something I invented. But I have no idea if I invented it first ;-)
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mec
I have already made that one
It is easy to make with a fairly high reduction
The reason I am interested in this Wolfrom is because it can have a
high reduction and be a clutch
This is what got me interested in planetary drives
https://www.youtube.com/watch?v=9sPi7DEbyI0
Quoting andy pugh :
O
On 15 December 2017 at 13:04, wrote:
> While I am asking off topic questions does anyone know if the specs for
> designing a Grisson gear drive are available? These look very cool.
> https://www.maul-konstruktionen.de/eng/grissongetriebe_e.php
While we are at it, how about this one?
https://www
On Fri, Dec 15, 2017, at 06:16 AM, andy pugh wrote:
> If you look at stock internal gears:
> http://www.hpcgears.com/pdf_c33/17.7.pdf
> You will find that getting a pair that differ by only one tooth isn't
> that easy. And they will differ in PCD. The PCD difference isn't to
> hard too deal with
While I am asking off topic questions does anyone know if the specs
for designing a Grisson gear drive are available? These look very cool.
https://www.maul-konstruktionen.de/eng/grissongetriebe_e.php
--
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Inkscape can help design gears then you convert them to ngc file
The "software" I use is a series of programs I have put together over
the years
I use my cnc router to cut the plastic
Quoting Chris Albertson :
Could you explain your design process. Are you using any software or are
you usin
I make most gears out of 1/4 inch acetal, sometimes polycarbonate just
because it is easy to get
I use successfully smaller diameter bits to refine the profile
I have never bought gears so I do not know how my gears would mesh with them
I can generate external or internal gears with a shifted pr
On 15 December 2017 at 01:28, wrote:
> I make plastic gears on a table top cnc mill
> Just things for toys and do-dads
The reason I asked is that external gears are easy to make, but
internal ones are not.
I make gears for fun, here is a triple coaxial differential gear:
https://photos.app.goo.g
Could you explain your design process. Are you using any software or are
you using my trick of "borrowing" CAS files for stock gear catalogs. I'd
like to develop the ability to do more custom work without using so much
time. I'm printing them now but I hope to use CNC later.
How are you cutti
I make plastic gears on a table top cnc mill
Just things for toys and do-dads
Quoting andy pugh :
On 14 December 2017 at 16:10, wrote:
Does any one have the information for calculating the components for a
wolfrom drive such as this
https://www.youtube.com/watch?v=hKwtyd990a4
It's just gea
I liked this up, The big question is at what level are you going to design
this. Are you going to simply specify the gears to of the Boston Gear
catalog or perhaps you need to know how to generate the involute curve for
the internal gear or maybe find the loads in the carriers.
Most people will t
On 14 December 2017 at 16:10, wrote:
> Does any one have the information for calculating the components for a
> wolfrom drive such as this
> https://www.youtube.com/watch?v=hKwtyd990a4
It's just gears, but with a slight profile offset to get the PCDs to
match between internal gears of two differ
Does any one have the information for calculating the components for a
wolfrom drive such as this
https://www.youtube.com/watch?v=hKwtyd990a4
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