http://www.geutskens.eu/neracar/images/PPL/6-Engine/6-Foot%20Starter%20Assy/03-620-Locknut,%20Magneto,lv-gec.jpg
I am struggling to come up with a plausible setup to machine a few of
these. (It is a Ner-a-Car starter clutch).
I have a CNC mill with a tilting 4th-axis and also a swivelling head.
I
I looked at the face of the slope and think it was done :-
endmill the path along arrow
http://www.collection.archivist.info/archive/mirror/03-620-Locknut,%20Magneto,lv-gec.jpg
then rotate around A 90 rinse repeat
Dave Caroline
On 13/10/2014, andy pugh wrote:
> http://www.geutskens.eu/neracar
On 13 October 2014 12:50, Dave Caroline wrote:
> I looked at the face of the slope and think it was done :-
> endmill the path along arrow
> http://www.collection.archivist.info/archive/mirror/03-620-Locknut,%20Magneto,lv-gec.jpg
My impression is that they are a true spiral, but it is hard to say
Good Day,I suggest that a side and face cutter with a dia equal to the radius
of the dog clutch ramp .john
> From: bodge...@gmail.com
> Date: Mon, 13 Oct 2014 12:35:46 +0100
> To: emc-users@lists.sourceforge.net
> Subject: [Emc-users] How to machine
>
> http://www.geutskens.eu/neracar/image
On 13 October 2014 13:07, john mcintyre wrote:
> Good Day,I suggest that a side and face cutter with a dia equal to the
> radius of the dog clutch ramp
I am not 100% sure what you are suggesting, can you elaborate?
As I see it the acute angle between the ramp face and the dog face is
the trick
The witness marks on
http://www.geutskens.eu/neracar/images/PPL/6-Engine/6-Foot%20Starter%20Assy/02-620-Locknut,%20Magneto,rev-gec.jpg
tell me it was not a true spiral
Dave
On 13/10/2014, andy pugh wrote:
> On 13 October 2014 13:07, john mcintyre wrote:
>> Good Day,I suggest that a side and fa
Good day,The clutch teeth appear to have a concave ramp and and the side of
the cutter will approximate this curveand the end of the cutter will machine
the perpendicular tooth face , you will need to adjust the cutter depth and
position so that the side of the cutter does not cut the next t
>
> Message: 2
> Date: Sat, 11 Oct 2014 16:59:18 +0100
> From: andy pugh
> Subject: Re: [Emc-users] Oscilloscope + logic analyzer (PC based)
> To: "Enhanced Machine Controller (EMC)"
>
> Message-ID:
>
> Content-Type: text/plain; charset=UTF-8
>
> On 11 October 2014 02:53, Gene Hes
Greetings,
I guess the ramp is a combination of
http://en.wikipedia.org/wiki/Brachistochrone_curve (lower part) and a aperiodic
asymptotic approximation (upper
part).
The spring force replaces the gravity.
I'm curious about the gcode. :)
m.
On 2014-10-13 14:56, john mcintyre wrote:
> Good day,
On 13 October 2014 13:36, Dave Caroline wrote:
> The witness marks on
> http://www.geutskens.eu/neracar/images/PPL/6-Engine/6-Foot%20Starter%20Assy/02-620-Locknut,%20Magneto,rev-gec.jpg
> tell me it was not a true spiral
Do you mean the partial polishing or the grooves in the flat surface?
I had
I dont think it is that tapered I think a plain endmill will be close enough
specially considering its age and available tools at the time
Dave
On 13/10/2014, andy pugh wrote:
> On 13 October 2014 13:36, Dave Caroline
> wrote:
>> The witness marks on
>> http://www.geutskens.eu/neracar/images/PP
On 13 October 2014 14:52, Dave Caroline wrote:
> I dont think it is that tapered I think a plain endmill will be close enough
> specially considering its age and available tools at the time
It looks like there is a slight undercut on the dog face to keep it in
mesh under load, and that can't be d
Dont overthink it;)
1) Mount it flat and cut four slots. It appears thats what they did. To
make them undercut as your last email states, incline on a rotary table
slightly (or tilt the head.)
2) Mount on an A-axis and machine the ramps from the side.
You will have a very small step at the botto
Not sure what I am missing but it looks like just a simple part with some
vertical ramps on the face. Probably could cut it vertically in a round
fixture or rotab vertically with a ball endmill and 3d mill the ramps and
cut the rest with flat endmill. If there is a slight taper to the lug faces
i
in production it could have been done with a gang setup on a
horizontal with a travel limit.
a slitting saw for the undercut and the right diameter for the rest
and an indexing device
Dave
On 13/10/2014, Pete Matos wrote:
> Not sure what I am missing but it looks like just a simple part with s
Experimenting in CAD...
The obvious approach does strange things to the tips of the dogs:
https://picasaweb.google.com/lh/photo/tOjgesG_f8aS02zviyc_Q9MTjNZETYmyPJy0liipFm0?feat=directlink
More angle to miss the tips is even wrongerer.
https://picasaweb.google.com/lh/photo/gLVD791wQP66PiMKou7SDdMTj
I think you are missing the actual curve assuming it was cut angular.
I dont have a running 3d modeler at the moment so have added a cheese
wedge to the plane of the dog face
http://www.collection.archivist.info/archive/mirror/03-620-Locknut,%20Magneto,lv-gec.jpg
Dave
On 13/10/2014, andy pugh
On 13 October 2014 16:18, Dave Caroline wrote:
> I think you are missing the actual curve assuming it was cut angular.
> http://www.collection.archivist.info/archive/mirror/03-620-Locknut,%20Magneto,lv-gec.jpg
If you mean what I think you mean, it looks closer:
https://picasaweb.google.com/lh/ph
Yes that now seems to me to be close to original method, time to
look/measure originals and guess what has worn away.
I think is one was thinking of strength of the teeth it is not
optimal, but old designs were often ner-enuf
Dave
On 13/10/2014, andy pugh wrote:
> On 13 October 2014 16:18, Dave
On Monday 13 October 2014 07:35:46 andy pugh did opine
And Gene did reply:
> http://www.geutskens.eu/neracar/images/PPL/6-Engine/6-Foot%20Starter%20
> Assy/03-620-Locknut,%20Magneto,lv-gec.jpg
>
> I am struggling to come up with a plausible setup to machine a few of
> these. (It is a Ner-a-Car sta
On 13 October 2014 16:55, Dave Caroline wrote:
> I think is one was thinking of strength of the teeth it is not
> optimal, but old designs were often ner-enuf
I could use this variant:
https://picasaweb.google.com/lh/photo/v11RMmOz5B-1dOgTnla3V9MTjNZETYmyPJy0liipFm0?feat=directlink
Better tooth
LOL. Just noticed the scale of the thing. Only 1/8" tall ramps? File it
by hand. Only you know what it mates to and its exact function. How
precise does it need to be?
SMD
On Mon, Oct 13, 2014 at 11:33 AM, andy pugh wrote:
> On 13 October 2014 16:18, Dave Caroline
> wrote:
> > I think you
I also think there could have been a flat on the tooth top if the
curve/slop finished earlier
Dave
On 13/10/2014, andy pugh wrote:
> On 13 October 2014 16:55, Dave Caroline
> wrote:
>> I think is one was thinking of strength of the teeth it is not
>> optimal, but old designs were often ner-enu
On 13 October 2014 17:14, Stephen Dubovsky wrote:
> LOL. Just noticed the scale of the thing. Only 1/8" tall ramps? File it
> by hand. Only you know what it mates to and its exact function.
The page I linked to earlier also has the mating gear.
If I was only making one, then I would probably
http://www.geutskens.eu/neracar/images/PPL/6-Engine/6-Foot%20Starter%20Assy/03-620-Locknut,%20Magneto,lv-gec.jpg
I am struggling to come up with a plausible setup to machine a few of
these. (It is a Ner-a-Car starter clutch).
Andy,
If I were machining your part I would blank it on a lathe and th
On Monday 13 October 2014 08:01:35 andy pugh did opine
And Gene did reply:
> On 13 October 2014 12:50, Dave Caroline
wrote:
> > I looked at the face of the slope and think it was done :-
> > endmill the path along arrow
> > http://www.collection.archivist.info/archive/mirror/03-620-Locknut,%2
> >
On Monday 13 October 2014 10:01:58 andy pugh did opine
And Gene did reply:
> On 13 October 2014 14:52, Dave Caroline
wrote:
> > I dont think it is that tapered I think a plain endmill will be close
> > enough specially considering its age and available tools at the time
>
> It looks like there i
On 13 October 2014 17:55, Gene Heskett wrote:
> I get the impression the ramps were cut with a straight end mill long axis
> so the cutting on the face was done on the side of the mill, while the
> rotary table was advanced in step.
It is very unlikely to have been done with an end-mill. I don't
On Monday 13 October 2014 10:44:27 andy pugh did opine
And Gene did reply:
> Experimenting in CAD...
>
> The obvious approach does strange things to the tips of the dogs:
> https://picasaweb.google.com/lh/photo/tOjgesG_f8aS02zviyc_Q9MTjNZETYmyP
> Jy0liipFm0?feat=directlink More angle to miss the t
Hello
is it possible to make to emc2 send/generate signal like I/O signal-5 V DC
- when system reads F0 -rapid move?
thank you
aram
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On 13 October 2014 18:23, a k wrote:
> Hello
> is it possible to make to emc2 send/generate signal like I/O signal-5 V DC
> - when system reads F0 -rapid move?
Yes. But you might have to read some documentation.
http://www.linuxcnc.org/docs/html/remap/structure.html
Section 4.1 says that F is re
On 10/13/2014 09:08 AM, andy pugh wrote:
On 13 October 2014 16:55, Dave Caroline wrote:
I think is one was thinking of strength of the teeth it is not
optimal, but old designs were often ner-enuf
I could use this variant:
https://picasaweb.google.com/lh/photo/v11RMmOz5B-1dOgTnla3V9MTjNZETYmyP
http://www.boltbusterinc.com
I can see it being useful for what it is designed for, but possibly
for other things too.
--
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto
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Comprehensive Serv
Induction heater for soldering. Shrink wrap shrinker (cabling). It might even
boil an egg in a small cup. Brilliant!
Marcus
On 13 Oct 2014, at 19:16, andy pugh wrote:
> http://www.boltbusterinc.com
>
> I can see it being useful for what it is designed for, but possibly
> for other things too.
I have a shaper that could cut those ramps fairly easily with some setup
tooling.
The rise could be done with a cam made up of a "pipe" cut at an angle
with a shaft/axle running up through it that is threaded into that part.
Use some die springs to hold the part down against the cam.
A couple
On 10/13/2014 2:16 PM, andy pugh wrote:
> http://www.boltbusterinc.com
>
> I can see it being useful for what it is designed for, but possibly
> for other things too.
>
For removing fasteners that are old and unique or hard to replace that
would be very worthwhile.
Dave
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