"notbob" <[email protected]> wrote in message
news:[email protected]...
> On 2009-04-17, Swingman <[email protected]> wrote:
>
>> Their problem ... this guy nicely illustrate that more than a few
>> intelligent, resourceful woodworkers have snapped to using SketchUp on
>> their own hook. ;)
>
> Hmmm....
>
> Strange that Google, a heavy linux based company, would only make Windows
> and Mac
> versions of this sketchup software. Any linux recommendations?
>
They bought the company. That is why it is the way that it is. They may
not think that the investment in making it linux compatible may be worth it.
Morris Dovey wrote:
> Swingman wrote:
>> You SketchUp users will want to grab his SU model of the jig ... an
>> absolute superb example of creating detailed woodworking _plans_
>>using SketchUp.
>>
>> Check it out ... you will be glad you did.
>
>> Their problem ... this guy nicely illustrate that more than a few
>> intelligent, resourceful woodworkers have snapped to using SketchUp on
>> their own hook. ;)
>>Guy is amazing with his jig making, logical and methodical, two
>>qualities dear to my own heart.
>>The table saw "gear cutting" jig is also worth a look ... always
>>wanted an "Alice in Wonderland" pocket watch ... maybe cocabolo?
>>Did you see what he did at?:
>> http://www.youtube.com/user/Matthiaswandel
>
> And for us unintelligent, non-resourceful folks, who have unreasonable
> difficulties drawing precise involute gear teeth with SU, there are
> (free) tools like
>
> http://www.forestmoon.com/Software/GearDXF/
>
> that produce DXF files of gears for use with DummyCAD (and other software).
Now, exactly what, from ALL my posts in that thread shown above, brought
on this shit about "precise involute gear teeth with SU"??
--
www.e-woodshop.net
Last update: 10/22/08
KarlC@ (the obvious)
In article <[email protected]>, Lew Hodgett
<[email protected]> wrote:
> Was that Rube Goldberg by any chance?
Lew,
That would be the man...
http://www.rubegoldberg.com/
Joe
aka 10x
On Fri, 17 Apr 2009 03:39:52 GMT, the infamous "Lew Hodgett"
<[email protected]> scrawled the following:
>"Phisherman" wrote:
>
>> The gear mechanism is amazing on this shop-made tablesaw jig. Check
>> out this video:
>>
>> http://tinyurl.com/dxdwlu
>
>Don't want to pee on somebody's parade, but looks to me like a lot of
>complexity for what is basically a very straight forward task.
>
>I give you Fred Bingham's book for reference.
Which one? _Practical Yacht Joinery_, which I bought, knowing full
well that I'd be rich someday soon, or _Boat Joinery and Cabinet
Making Simplified_?
Agreed, a stackable type of box joint jig is easily possible, it could
only do one side at a time, unlike this one. Mathias' jig ROCKS!
------
We're born hungry, wet, 'n naked, and it gets worse from there.
Phisherman wrote:
> The gear mechanism is amazing on this shop-made tablesaw jig. Check
> out this video:
>
> http://tinyurl.com/dxdwlu
Cute. Easy to make too except (for me) the gears. To that end and in case
I actually make one someday here's a link to a gear template
generator...click on same at bottom right, the generator will load.
Unfortunately, you can't save the actual template page or even a working
link to it.
http://woodgears.ca/
--
dadiOH
____________________________
dadiOH's dandies v3.06...
...a help file of info about MP3s, recording from
LP/cassette and tips & tricks on this and that.
Get it at http://mysite.verizon.net/xico
"Leon" wrote:
> But it is pretty cool, I'll not be getting rid of my Leigh Jig Box
> Joint template any time soon.
Even that is overkill<grin>, and yes it is "cool" if you like
complexity..
I'm trying to remember the comic strip that featured the guy who would
take the simplest task and build the most complex machine to solve the
problem.
Was that Rube Goldberg by any chance?
Lew
MikeWhy wrote:
> "Leon" <[email protected]> wrote in message
> news:[email protected]...
>>
>> "Swingman" <[email protected]> wrote in message
>> news:[email protected]...
>>> Phisherman wrote:
>>>> The gear mechanism is amazing on this shop-made tablesaw jig. Check
>>>> out this video:
>>>>
>>>> http://tinyurl.com/dxdwlu
>>>
>>> ... thanks for the heads-up!
>>>
>>> You SketchUp users will want to grab his SU model of the jig ... an
>>> absolute superb example of creating detailed woodworking _plans_
>>> using SketchUp.
>>>
>>> Check it out ... you will be glad you did.
>>
>> Careful there Swingman some here will not be able to figure out how to
>> use Sketchup. ;~)
>
> As though I/we needed taunting... ;) Give credit where credit is due.
> The man's an obvious genius, and his workmanship is topnotch. I was
> about to remark on replacing the gear drive with a DC servo motor,
> ground ballscrew, and linear slides, but I see he already did one with a
> stepper. It wouldn't take much to put a microcontroller on it to drive
> it without a PC. I have an old AVR Butterfly sitting around unused...
Hmm - if you're going to do that, why not add a second motor to move the
stock over the blade too? Then you could do something else while it
makes the joint for you...
...and if you do that then you might as well add a third motor and build
http://www.iedu.com/DeSoto/Projects/JBot/
so that it can make about any kind corner joint you can think of.
Pull out that Butterfly and a soldering pencil. :)
--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/
Swingman wrote:
> Their problem ... this guy nicely illustrate that more than a few
> intelligent, resourceful woodworkers have snapped to using SketchUp on
> their own hook. ;)
And for us unintelligent, non-resourceful folks, who have unreasonable
difficulties drawing precise involute gear teeth with SU, there are
(free) tools like
http://www.forestmoon.com/Software/GearDXF/
that produce DXF files of gears for use with DummyCAD (and other software).
--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/
Robatoy wrote:
> You'd need a .dxf import function that is pretty robust to take
> advantage of that, eh?
> :-^
Who'd ever want to work with an import function that /wasn't/ robust?
(Says the guy who went "Phew!" when he successfully imported his first
gear dxf into his ancient DesignCAD Pro 2000)
--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/
Swingman wrote:
> Now, exactly what, from ALL my posts in that thread shown above, brought
> on this shit about "precise involute gear teeth with SU"??
My apologies - I was experiencing an adversity/frustration overload and
shouldn't have posted anything anywhere...
...and MikeWhy was right that one of the headaches involved backlash in
a trough-type reflector tracking mechanism subject to (mostly)
unpredictable wind loading.
--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/
MikeWhy wrote:
> "Morris Dovey" <[email protected]> wrote in message
> news:[email protected]...
>> ...and MikeWhy was right that one of the headaches involved backlash
>> in a trough-type reflector tracking mechanism subject to (mostly)
>> unpredictable wind loading.
>
> I haven't actually ever made a hob, but know of the general principles.
> If your gears are non-metallic, wood or GRP, the problem might be even
> simpler. Better still, if the geartrain is a worm gear, a simple tap --
> the things used to cut internal threads -- are perfectly serviceable
> hobs for cutting the worm wheel.
Your suggestion is appreciated, but this thing needs to be thermally
driven (as opposed to motor driven) - and if I need to use a geared
approach, it will probably be a sliding rack with one or two simple spur
gears.
It's one of those problems that /seems/ like should have a simple and
inexpensive solution, but every attempt so far has led to unacceptable
complexity and/or cost.
--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/
Robatoy wrote:
> Bicycle sprocket parts....VERY universal and cheap.
Hmm - I hadn't though about this, but will.
> Those nodding oil pump things I see all over the country-side around
> Petrolia?
This comes closest to what I'm working on - except that that the power
source is solar heat. I think I can make it work with a flat panel, but
the efficiency (which translates into ROI here) goes way up if
high-temperature heat is used. That requires a collector aiming
mechanism to track the sun.
Recently I got a video of the first engine actually pumping water (not
doing a very good job yet, but still not bad for a first try) in Pakistan.
http://www.iedu.com/DeSoto/Projects/Stirling/Elsewhere/
The sight glass on the piston shows the pump displacement, and the
pumped volume should match that. I think their problem is check valves
with too-strong springs.
The sun-tracker will, of course, need to make one (controlled) cycle per
day, and somehow (automagically) start out facing east in the morning.
> Your reciprocal motion on one end, the same, but fulcrummed (LOL) on
> the other as a pump?
Exactly! The same, only different! (ROFL)
--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/
MikeWhy wrote:
> Locking against heavy loading would seem to suggest a worm. PV? ;) A
> Stirling pumped "hydraulic" motor/water wheel? I know... complexity.
PV plus motor plus worm drive is certainly an attractive route, but too
expensive and not suited for local production and maintenance.
It needs to be really simple and so inexpensive that it's not worth
stealing. For context, rural Somalia might be one of the target "market"
areas.
--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/
Robatoy wrote:
> On Apr 25, 4:47 pm, Morris Dovey <[email protected]> wrote:
> [snip]
>> The sun-tracker will, of course, need to make one (controlled) cycle per
>> day, and somehow (automagically) start out facing east in the morning.
>
> That's an easy one. Expanding gas cylinder like the greenhouse people
> use to open a vent. Hide it in the shadow of the collector itself, so
> when the sun peeks around, it starts expanding till it creates its own
> shadow again sortakinda like a wheatstone bridge but mechanical. When
> the sun stops playing peek-a-boo with the cylinder at night, it is
> brought home by its own collapse, perhaps helped by a counterweight/
> spring.
> The cylinder would sit lengthwise along the obvious edge. It could sit
> in a slot in the collector itself for extra intensity. The mechanical
> challenge is minimal.
I've been considering /two/ such gas cylinders (so that operation isn't
air temperature dependent) - one on each side of the collector, each
side connected to opposite ends/sides of a double-acting hydraulic or
pneumatic cylinder. That setup would allow for an eastward pressure bias
that would be overridden during the day, but would cause the tracker to
revert to east-pointing at night, pretty much as you describe.
The major drawback appears to be instability in gusty winds due to the
gas' compressibility.
> Maybe something bi-metal?
Maybe, but I think your first idea is a better match to the problem.
--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/
J. Clarke wrote:
> Morris Dovey wrote:
>> MikeWhy wrote:
>>
>>> Locking against heavy loading would seem to suggest a worm. PV? ;) A
>>> Stirling pumped "hydraulic" motor/water wheel? I know... complexity.
>>
>> PV plus motor plus worm drive is certainly an attractive route, but
>> too expensive and not suited for local production and maintenance.
>>
>> It needs to be really simple and so inexpensive that it's not worth
>> stealing. For context, rural Somalia might be one of the target
>> "market" areas.
>
> Offhand I'm not sure how one would design such a thing but rather than
> using shaft work could you pump water from one plastic bag to another,
> with appropriate levers and paddles resting on top of the bags?
Maybe. I've been too involved in trying to help get the engine working
to worry about the tracking system until now. Nearly all of my past
experience with control systems has been digital, and I'm really in over
my head on this one.
It seems to me that if I can choose one side to pump to, then I should
be able to pump to a cylinder/piston linear actuator of some kind
(thinking of a reworked shock absorber or strut) to do that job.
Hmm - if I use robatoy's gas cylinder idea to control a valve to direct
part of the pump flow to one of your actuators, I might be on a better
track than I am now, even though I'll still need to figure out some
reliable way to make it face the morning sun without being vulnerable to
nighttime gusts.
--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/
"Swingman" <[email protected]> wrote in message
news:[email protected]...
> Morris Dovey wrote:
>> And for us unintelligent, non-resourceful folks, who have unreasonable
>> difficulties drawing precise involute gear teeth with SU, there are
>> (free) tools like
>>
>> http://www.forestmoon.com/Software/GearDXF/
>>
>> that produce DXF files of gears for use with DummyCAD (and other
>> software).
>
> Now, exactly what, from ALL my posts in that thread shown above, brought
> on this shit about "precise involute gear teeth with SU"??
Probably the mistaken presumption of a shared understanding that the role of
the gears in precisely positioning the work implies a free turning, backlash
free mechanism. ;) I think I would have just cut a hob on the knee mill and
made the plywood gears that way. Very little drawing or figuring involved,
obviating the obvious problems.
Where are the plans? I went to his website but don't seem to be able
to find them.
On Apr 16, 7:44=A0pm, Swingman <[email protected]> wrote:
> Phisherman wrote:
> > The gear mechanism is amazing on this shop-made tablesaw jig. =A0Check
> > out this video:
>
> >http://tinyurl.com/dxdwlu
>
> ... thanks for the heads-up!
>
> You SketchUp users will want to grab his SU model of the jig ... an
> absolute superb example of creating detailed woodworking _plans_ using
> SketchUp.
>
> Check it out ... you will be glad you did.
>
> --www.e-woodshop.net
> Last update: 10/22/08
> KarlC@ (the obvious)
"Leon" <[email protected]> wrote in message
news:[email protected]...
>
> "notbob" <[email protected]> wrote in message
> news:[email protected]...
>> On 2009-04-17, notbob <[email protected]> wrote:
>>> On 2009-04-17, Lee Michaels <leemichaels*nadaspam*@comcast.net> wrote:
>>>>>
>>>> They bought the company. That is why it is the way that it is. They
>>>> may
>>>> not think that the investment in making it linux compatible may be
>>>> worth it.
>>>
>>> True dat. Thanks for the reply.
>>
>> Well, what do you know!
>>
>> http://wine-review.blogspot.com/2007/12/google-sketchup-6-on-linux-and-freebsd.html
>>
>> The wine project just keeps chugging along. ;)
>>
>> nb
>
> To bad they are only offering V6 vs. V7. I wonder what that is all about.
The write up was Dec 2007. It could very well work.
"MikeWhy" <[email protected]> wrote in message
news:[email protected]...
>
> The write up was Dec 2007. It could very well work.
Good Point~
On Apr 24, 11:33=A0am, Morris Dovey <[email protected]> wrote:
> Swingman wrote:
> > Their problem ... this guy nicely illustrate that more than a few
> > intelligent, resourceful woodworkers have snapped to using SketchUp on
> > their own hook. =A0;)
>
> And for us unintelligent, non-resourceful folks, who have unreasonable
> difficulties drawing precise involute gear teeth with SU, there are
> (free) tools like
>
> =A0 =A0http://www.forestmoon.com/Software/GearDXF/
>
> that produce DXF files of gears for use with DummyCAD (and other software=
).
>
You'd need a .dxf import function that is pretty robust to take
advantage of that, eh?
:-^
On Apr 25, 2:27=A0pm, Morris Dovey <[email protected]> wrote:
> MikeWhy wrote:
> > "Morris Dovey" <[email protected]> wrote in message
> >news:[email protected]...
> >> ...and MikeWhy was right that one of the headaches involved backlash
> >> in a trough-type reflector tracking mechanism subject to (mostly)
> >> unpredictable wind loading.
>
> > I haven't actually ever made a hob, but know of the general principles.
> > If your gears are non-metallic, wood or GRP, the problem might be even
> > simpler. Better still, if the geartrain is a worm gear, a simple tap --
> > the things used to cut internal threads -- are perfectly serviceable
> > hobs for cutting the worm wheel.
>
> Your suggestion is appreciated, but this thing needs to be thermally
> driven (as opposed to motor driven) - and if I need to use a geared
> approach, it will probably be a sliding rack with one or two simple spur
> gears.
>
> It's one of those problems that /seems/ like should have a simple and
> inexpensive solution, but every attempt so far has led to unacceptable
> complexity and/or cost.
>
> --
> Morris Dovey
> DeSoto Solar
> DeSoto, Iowa USAhttp://www.iedu.com/DeSoto/
Toothed belt? A la printhead on an inkjet? Bicycle sprocket
parts....VERY universal and cheap.
Or
Those nodding oil pump things I see all over the country-side around
Petrolia?
Your reciprocal motion on one end, the same, but fulcrummed (LOL) on
the other as a pump?
"notbob" <[email protected]> wrote in message
news:[email protected]...
> On 2009-04-17, notbob <[email protected]> wrote:
>> On 2009-04-17, Lee Michaels <leemichaels*nadaspam*@comcast.net> wrote:
>>>>
>>> They bought the company. That is why it is the way that it is. They
>>> may
>>> not think that the investment in making it linux compatible may be worth
>>> it.
>>
>> True dat. Thanks for the reply.
>
> Well, what do you know!
>
> http://wine-review.blogspot.com/2007/12/google-sketchup-6-on-linux-and-freebsd.html
>
> The wine project just keeps chugging along. ;)
>
> nb
To bad they are only offering V6 vs. V7. I wonder what that is all about.
On Apr 25, 11:30=A0am, Morris Dovey <[email protected]> wrote:
> Swingman wrote:
> > Now, exactly what, from ALL my posts in that thread shown above, brough=
t
> > on this shit about "precise involute gear teeth with SU"??
>
> My apologies - I was experiencing an adversity/frustration overload and
> shouldn't have posted anything anywhere...
>
> ...and MikeWhy was right that one of the headaches involved backlash in
> a trough-type reflector tracking mechanism subject to (mostly)
> unpredictable wind loading.
>
> --
> Morris Dovey
> DeSoto Solar
> DeSoto, Iowa USAhttp://www.iedu.com/DeSoto/
Meshy business, that.
"SonomaProducts.com" <[email protected]> wrote in message
news:5d4c3f53-4e38-49bc-9a79-6e9f8c89a66f@z16g2000prd.googlegroups.com...
Where are the plans? I went to his website but don't seem to be able
to find them.
======
http://woodgears.ca/box_joint/jig_plans/index.html
"MikeWhy" wrote:
> I haven't actually ever made a hob, but know of the general
> principles. If your gears are non-metallic, wood or GRP, the problem
> might be even simpler. Better still, if the geartrain is a worm
> gear, a simple tap -- the things used to cut internal threads -- are
> perfectly serviceable hobs for cutting the worm wheel.
Hobbing is the least accurate but highest production rate process for
making a gear.
Least back lash is with a worm/wheel drive.
The higher the ratio, the less the back lash.
Lew
Leon wrote:
> Here is what you need to build, scroll down to the second project on this
> page
>
> http://www.sentex.ca/~mwandel/built/wooden_machines.html
LOL ...but my BB doesn't have a keyboard.
Guy is amazing with his jig making, logical and methodical, two
qualities dear to my own heart.
The table saw "gear cutting" jig is also worth a look ... always wanted
an "Alice in Wonderland" pocket watch ... maybe cocabolo?
--
www.e-woodshop.net
Last update: 10/22/08
KarlC@ (the obvious)
On Fri, 24 Apr 2009 21:28:34 -0500, Martin H. Eastburn wrote:
> Robatoy wrote:
>> On Apr 24, 11:33 am, Morris Dovey <[email protected]> wrote:
>>> Swingman wrote:
>>>> Their problem ... this guy nicely illustrate that more than a few
>>>> intelligent, resourceful woodworkers have snapped to using SketchUp
>>>> on their own hook. ;)
>>> And for us unintelligent, non-resourceful folks, who have unreasonable
>>> difficulties drawing precise involute gear teeth with SU, there are
>>> (free) tools like
>>>
>>> http://www.forestmoon.com/Software/GearDXF/
>>>
>>> that produce DXF files of gears for use with DummyCAD (and other
>>> software).
>>>
>>>
>> You'd need a .dxf import function that is pretty robust to take
>> advantage of that, eh?
>> :-^
>>
> I have multiple cad packages that can do that.
>
> I have a excel spread sheet that generates gears and the output can be
> imported for a gear in my cad. Kinda neat. I made some spiral gears
> that hang from a line and dangle below.
>
> Martin
>
Slightly OT, but do any of you who play with gears have a suggestion for
a package I could use to model simple-to-middling gearboxes, both CAD
style drawings and also actual modelling where I could adjust the speed
of an input shaft (or two) and see what happens?
"Swingman" <[email protected]> wrote in message
news:[email protected]...
> Did you see what he did at?:
>
> http://www.youtube.com/user/Matthiaswandel
http://woodgears.ca/jenga_pistol/
Phisherman wrote:
> The gear mechanism is amazing on this shop-made tablesaw jig. Check
> out this video:
>
> http://tinyurl.com/dxdwlu
... thanks for the heads-up!
You SketchUp users will want to grab his SU model of the jig ... an
absolute superb example of creating detailed woodworking _plans_ using
SketchUp.
Check it out ... you will be glad you did.
--
www.e-woodshop.net
Last update: 10/22/08
KarlC@ (the obvious)
"Swingman" <[email protected]> wrote in message
news:[email protected]...
> Phisherman wrote:
>> The gear mechanism is amazing on this shop-made tablesaw jig. Check
>> out this video:
>>
>> http://tinyurl.com/dxdwlu
>
> ... thanks for the heads-up!
>
> You SketchUp users will want to grab his SU model of the jig ... an
> absolute superb example of creating detailed woodworking _plans_ using
> SketchUp.
>
> Check it out ... you will be glad you did.
Careful there Swingman some here will not be able to figure out how to use
Sketchup. ;~)
"Morris Dovey" <[email protected]> wrote in message
news:[email protected]...
> MikeWhy wrote:
>> "Leon" <[email protected]> wrote in message
>> news:[email protected]...
>>>
>>> "Swingman" <[email protected]> wrote in message
>>> news:[email protected]...
>>>> Phisherman wrote:
>>>>> The gear mechanism is amazing on this shop-made tablesaw jig. Check
>>>>> out this video:
>>>>>
>>>>> http://tinyurl.com/dxdwlu
>>>>
>>>> ... thanks for the heads-up!
>>>>
>>>> You SketchUp users will want to grab his SU model of the jig ... an
>>>> absolute superb example of creating detailed woodworking _plans_ using
>>>> SketchUp.
>>>>
>>>> Check it out ... you will be glad you did.
>>>
>>> Careful there Swingman some here will not be able to figure out how to
>>> use Sketchup. ;~)
>>
>> As though I/we needed taunting... ;) Give credit where credit is due. The
>> man's an obvious genius, and his workmanship is topnotch. I was about to
>> remark on replacing the gear drive with a DC servo motor, ground
>> ballscrew, and linear slides, but I see he already did one with a
>> stepper. It wouldn't take much to put a microcontroller on it to drive it
>> without a PC. I have an old AVR Butterfly sitting around unused...
>
> Hmm - if you're going to do that, why not add a second motor to move the
> stock over the blade too? Then you could do something else while it makes
> the joint for you...
>
> ...and if you do that then you might as well add a third motor and build
>
> http://www.iedu.com/DeSoto/Projects/JBot/
>
> so that it can make about any kind corner joint you can think of.
>
> Pull out that Butterfly and a soldering pencil. :)
Everytime I see a Leigh jig, I think an X-Y table, and a router motor for
the spindle. One of these days, I'll actually do something about it. The
last time this came up, I ended up with a boxful of dozukis and waterstones
instead, which obviated the need (for the time being).
The single axis jig, as here in the box joint cutter, is a special case in
simplicity. It should work equally well on the router table, doing the job
of an Incra-style jig. The full set of Incra templates could reasonably be
stored in flash. The more I think about it, the simpler it seems and the
more generally useful (in the same way that an Incra jig is useful).
"Lew Hodgett" <[email protected]> wrote in message
news:[email protected]...
> "Phisherman" wrote:
>
>> The gear mechanism is amazing on this shop-made tablesaw jig. Check
>> out this video:
>>
>> http://tinyurl.com/dxdwlu
>
> Don't want to pee on somebody's parade, but looks to me like a lot of
> complexity for what is basically a very straight forward task.
>
> I give you Fred Bingham's book for reference.
>
> Lew
But it is pretty cool, I'll not be getting rid of my Leigh Jig Box Joint
template any time soon.
"Leon" <[email protected]> wrote in message
news:[email protected]...
>
> "Swingman" <[email protected]> wrote in message
> news:[email protected]...
>> Phisherman wrote:
>>> The gear mechanism is amazing on this shop-made tablesaw jig. Check
>>> out this video:
>>>
>>> http://tinyurl.com/dxdwlu
>>
>> ... thanks for the heads-up!
>>
>> You SketchUp users will want to grab his SU model of the jig ... an
>> absolute superb example of creating detailed woodworking _plans_ using
>> SketchUp.
>>
>> Check it out ... you will be glad you did.
>
> Careful there Swingman some here will not be able to figure out how to use
> Sketchup. ;~)
As though I/we needed taunting... ;) Give credit where credit is due. The
man's an obvious genius, and his workmanship is topnotch. I was about to
remark on replacing the gear drive with a DC servo motor, ground ballscrew,
and linear slides, but I see he already did one with a stepper. It wouldn't
take much to put a microcontroller on it to drive it without a PC. I have an
old AVR Butterfly sitting around unused...
On Apr 16, 9:02 pm, "Lew Hodgett" <[email protected]> wrote:
> "Leon" wrote:
> > But it is pretty cool, I'll not be getting rid of my Leigh Jig Box
> > Joint template any time soon.
>
> Even that is overkill<grin>, and yes it is "cool" if you like
> complexity..
>
> I'm trying to remember the comic strip that featured the guy who would
> take the simplest task and build the most complex machine to solve the
> problem.
>
> Was that Rube Goldberg by any chance?
>
> Lew
My life's a comic strip like that, except I rarely solve the problems.
And not by any chance. I do it deliberately. (smiley face) Tom
On Apr 25, 4:47=A0pm, Morris Dovey <[email protected]> wrote:
[snip]
>
> The sun-tracker will, of course, need to make one (controlled) cycle per
> day, and somehow (automagically) start out facing east in the morning.
>
That's an easy one. Expanding gas cylinder like the greenhouse people
use to open a vent. Hide it in the shadow of the collector itself, so
when the sun peeks around, it starts expanding till it creates its own
shadow again sortakinda like a wheatstone bridge but mechanical. When
the sun stops playing peek-a-boo with the cylinder at night, it is
brought home by its own collapse, perhaps helped by a counterweight/
spring.
The cylinder would sit lengthwise along the obvious edge. It could sit
in a slot in the collector itself for extra intensity. The mechanical
challenge is minimal.
Maybe something bi-metal?
"Phisherman" wrote:
> The gear mechanism is amazing on this shop-made tablesaw jig. Check
> out this video:
>
> http://tinyurl.com/dxdwlu
Don't want to pee on somebody's parade, but looks to me like a lot of
complexity for what is basically a very straight forward task.
I give you Fred Bingham's book for reference.
Lew
Duhh, read the paragraph. Found the link.
On Apr 16, 7:44=A0pm, Swingman <[email protected]> wrote:
> Phisherman wrote:
> > The gear mechanism is amazing on this shop-made tablesaw jig. =A0Check
> > out this video:
>
> >http://tinyurl.com/dxdwlu
>
> ... thanks for the heads-up!
>
> You SketchUp users will want to grab his SU model of the jig ... an
> absolute superb example of creating detailed woodworking _plans_ using
> SketchUp.
>
> Check it out ... you will be glad you did.
>
> --www.e-woodshop.net
> Last update: 10/22/08
> KarlC@ (the obvious)
"Morris Dovey" <[email protected]> wrote in message
news:[email protected]...
> ...and MikeWhy was right that one of the headaches involved backlash in a
> trough-type reflector tracking mechanism subject to (mostly) unpredictable
> wind loading.
I haven't actually ever made a hob, but know of the general principles. If
your gears are non-metallic, wood or GRP, the problem might be even simpler.
Better still, if the geartrain is a worm gear, a simple tap -- the things
used to cut internal threads -- are perfectly serviceable hobs for cutting
the worm wheel.
In article <[email protected]>,
Phisherman <[email protected]> wrote:
>The gear mechanism is amazing on this shop-made tablesaw jig. Check
>out this video:
>
>http://tinyurl.com/dxdwlu
The guy's website is http://woodgears.ca/index.html
I make it a point to visit at least once a week. He does amazing stuff.
--
-Ed Falk, [email protected]
http://thespamdiaries.blogspot.com/
Morris Dovey wrote:
> MikeWhy wrote:
>
>> Locking against heavy loading would seem to suggest a worm. PV? ;) A
>> Stirling pumped "hydraulic" motor/water wheel? I know... complexity.
>
> PV plus motor plus worm drive is certainly an attractive route, but
> too expensive and not suited for local production and maintenance.
>
> It needs to be really simple and so inexpensive that it's not worth
> stealing. For context, rural Somalia might be one of the target
> "market" areas.
Offhand I'm not sure how one would design such a thing but rather than using
shaft work could you pump water from one plastic bag to another, with
appropriate levers and paddles resting on top of the bags?
"SonomaProducts.com" <[email protected]> wrote in message
news:5d4c3f53-4e38-49bc-9a79-6e9f8c89a66f@z16g2000prd.googlegroups.com...
Where are the plans? I went to his website but don't seem to be able
to find them.
Follow the link and go to the bottom of the pages. You find'm.
"Morris Dovey" <[email protected]> wrote in message
news:[email protected]...
> MikeWhy wrote:
>> "Morris Dovey" <[email protected]> wrote in message
>> news:[email protected]...
>>> in a trough-type reflector tracking mechanism subject to (mostly)
>>> unpredictable wind loading.
>>
>> I haven't actually ever made a hob, but know of the general principles.
>> If your gears are non-metallic, wood or GRP, the problem might be even
>> simpler. Better still, if the geartrain is a worm gear, a simple tap --
>> the things used to cut internal threads -- are perfectly serviceable hobs
>> for cutting the worm wheel.
>
> Your suggestion is appreciated, but this thing needs to be thermally
> driven (as opposed to motor driven) - and if I need to use a geared
> approach, it will probably be a sliding rack with one or two simple spur
> gears.
>
> It's one of those problems that /seems/ like should have a simple and
> inexpensive solution, but every attempt so far has led to unacceptable
> complexity and/or cost.
Locking against heavy loading would seem to suggest a worm. PV? ;) A
Stirling pumped "hydraulic" motor/water wheel? I know... complexity.
I have multiple cad packages that can do that.
I have a excel spread sheet that generates gears and the output
can be imported for a gear in my cad. Kinda neat. I made some
spiral gears that hang from a line and dangle below.
Martin
Robatoy wrote:
> On Apr 24, 11:33 am, Morris Dovey <[email protected]> wrote:
>> Swingman wrote:
>>> Their problem ... this guy nicely illustrate that more than a few
>>> intelligent, resourceful woodworkers have snapped to using SketchUp on
>>> their own hook. ;)
>> And for us unintelligent, non-resourceful folks, who have unreasonable
>> difficulties drawing precise involute gear teeth with SU, there are
>> (free) tools like
>>
>> http://www.forestmoon.com/Software/GearDXF/
>>
>> that produce DXF files of gears for use with DummyCAD (and other software).
>>
>
> You'd need a .dxf import function that is pretty robust to take
> advantage of that, eh?
> :-^
>
Leon wrote:
> "Swingman" <[email protected]> wrote in message
> news:[email protected]...
>> Phisherman wrote:
>>> The gear mechanism is amazing on this shop-made tablesaw jig. Check
>>> out this video:
>>>
>>> http://tinyurl.com/dxdwlu
>> ... thanks for the heads-up!
>>
>> You SketchUp users will want to grab his SU model of the jig ... an
>> absolute superb example of creating detailed woodworking _plans_ using
>> SketchUp.
>>
>> Check it out ... you will be glad you did.
>
> Careful there Swingman some here will not be able to figure out how to use
> Sketchup. ;~)
Their problem ... this guy nicely illustrate that more than a few
intelligent, resourceful woodworkers have snapped to using SketchUp on
their own hook. ;)
--
www.e-woodshop.net
Last update: 10/22/08
KarlC@ (the obvious)
"Swingman" <[email protected]> wrote in message
news:[email protected]...
> Phisherman wrote:
>> The gear mechanism is amazing on this shop-made tablesaw jig. Check
>> out this video:
>>
>> http://tinyurl.com/dxdwlu
>
> ... thanks for the heads-up!
>
> You SketchUp users will want to grab his SU model of the jig ... an
> absolute superb example of creating detailed woodworking _plans_ using
> SketchUp.
>
> Check it out ... you will be glad you did.
>
> --
> www.e-woodshop.net
> Last update: 10/22/08
> KarlC@ (the obvious)
Here is what you need to build, scroll down to the second project on this
page
http://www.sentex.ca/~mwandel/built/wooden_machines.html
On 2009-04-17, Swingman <[email protected]> wrote:
> Their problem ... this guy nicely illustrate that more than a few
> intelligent, resourceful woodworkers have snapped to using SketchUp on
> their own hook. ;)
Hmmm....
Strange that Google, a heavy linux based company, would only make Windows and Mac
versions of this sketchup software. Any linux recommendations?
nb
On 2009-04-17, notbob <[email protected]> wrote:
> On 2009-04-17, Lee Michaels <leemichaels*nadaspam*@comcast.net> wrote:
>>>
>> They bought the company. That is why it is the way that it is. They may
>> not think that the investment in making it linux compatible may be worth it.
>
> True dat. Thanks for the reply.
Well, what do you know!
http://wine-review.blogspot.com/2007/12/google-sketchup-6-on-linux-and-freebsd.html
The wine project just keeps chugging along. ;)
nb
"Swingman" <[email protected]> wrote in message
news:[email protected]...
> Did you see what he did at?:
>
> http://www.youtube.com/user/Matthiaswandel
Here, Sketch this: http://woodgears.ca/schulteiss/index.html