Re: [Emc-users] new thread inspired by Christophers question about 3d printer sliceing SW. (Gene Heskett)

[TJoseph Powderly]

recursion, stack full , hahaha

even in russian it was good joke

tomp tjtr33

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Re: [Emc-users] new thread inspired by Christophers question about 3d printer sliceing SW. (Gene Heskett)

[Gene Heskett]

On Wednesday 17 May 2017 12:27:16 John Thornton wrote:

> That's a good idea if your mill can't reach the speeds needed. Of
> course it costs nothing to test just run a stl file through a slicer
> and remove all the M codes and see if it can keep up. Z is super slow
> so that's not a problem.

For the price of a subtable built right, I can just buy a small machine.  
But isn't that a case of buying a machine to work on the other machine?  
But thats recursive as Bertho described.
>
> JT
>
> On 5/17/2017 11:01 AM, richsh...@comcast.net wrote:
> > You might consider building a lightweight sub-table and just move
> > that.
>
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Cheers, Gene Heskett
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Re: [Emc-users] new thread inspired by Christophers question about 3d printer sliceing SW. (Gene Heskett)

[John Thornton]

That's a good idea if your mill can't reach the speeds needed. Of course 
it costs nothing to test just run a stl file through a slicer and remove 
all the M codes and see if it can keep up. Z is super slow so that's not 
a problem.

JT


On 5/17/2017 11:01 AM, richsh...@comcast.net wrote:
> You might consider building a lightweight sub-table and just move that.
>
>
>


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Re: [Emc-users] new thread inspired by Christophers question about 3d printer sliceing SW. (Gene Heskett)

[richshoop]

You might consider building a lightweight sub-table and just move that. 


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Today's Topics: 

1. Re: new thread inspired by Christophers question about 3d 
printer sliceing SW. (Gene Heskett) 
2. Re: new thread inspired by Christophers question about 3d 
printer sliceing SW. (Gene Heskett) 
3. Re: new thread inspired by Christophers question about 3d 
printer sliceing SW. (John Thornton) 
4. Re: new thread inspired by Christophers question about 3d 
printer sliceing SW. (Chris Albertson) 
5. Re: new thread inspired by Christophers question about 3d 
printer sliceing SW. (sam sokolik) 
6. Re: new thread inspired by Christophers question about 3d 
printer sliceing SW. (Ken Strauss) 


-- 

Message: 1 
Date: Tue, 16 May 2017 10:13:46 -0400 
From: Gene Heskett  
Subject: Re: [Emc-users] new thread inspired by Christophers question 
about 3d printer sliceing SW. 
To: emc-users@lists.sourceforge.net 
Message-ID: <201705161013.46792.ghesk...@shentel.net> 
Content-Type: Text/Plain; charset="iso-8859-1" 

On Tuesday 16 May 2017 09:56:18 Marcus Bowman wrote: 

> On 16 May 2017, at 14:27, Gene Heskett wrote: 
> > Greetings all; 
> > 
> > And the next logical question from me is: 
> > 
> > Has anyone put a printhead on a std moving table milling machine, 
> > and used it to do some 3d additive printing? I am "out of room" for 
> > more machines, and that seems like a possible to do project. Doing 
> > it well would remain to be seen. 
> 
> Well I would certainly like to try this. 
> 
> > The printhead seems like the lessor of two aspects, as a heated bed 
> > that big seems to be the bigger problem. 
> 
> The bed wouldn't need to be as big as the bed of the mill (at least 
> initially). 
> 
For the size of projects I have in mind, 5x10 inches would be sufficient. 
Belt covers for the timing belts moving my lathe. Build from the outside 
puts the flat face on the bed, and the hollow part facing up, I should 
be able to write that g-code myself. 

> Marcus 
> 
> > Discussion? 
> > 
> > Cheers, Gene Heskett 
> > -- 
> > "There are four boxes to be used in defense of liberty: 
> > soap, ballot, jury, and ammo. Please use in that order." 
> > -Ed Howdershelt (Author) 
> > Genes Web page  
> > 
> >  
> >-- Check out the vibrant tech community on one of the world's 
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Cheers, Gene Heskett 
-- 
"There are four boxes to be used in defense of liberty: 
soap, ballot, jury, and ammo. Please use in that order." 
-Ed Howdershelt (Author) 
Genes Web page  



-- 

Message: 2 
Date: Tue, 16 May 2017 10:21:36 -0400 
From: Gene Heskett  
Subject: Re: [Emc-users] new thread inspired by Christophers question 
about 3d printer sliceing SW. 
To: emc-users@lists.sourceforge.net 
Message-ID: <201705161021.36710.ghesk...@shentel.net> 
Content-Type: Text/Plain; charset="iso-8859-1" 

On Tuesday 16 May 2017 10:06:53 N. Christopher Perry wrote: 

> Gene, 
> 
> Turns out that printing with a heavy machine like a mill presents some 
> problems, as the inertia is orders of magnitude higher than on 3D 
> printers. 
> 
> 3D printers are designed to have as low an inertia as possible to 
> simplify the filament control dynamics. With a larger/heavier machine 
> those control dynamics get pretty complex as I understand it. Plus, 
> your prints would take an eternity. 
> 
> N. Christopher Perry 
> 
I hadn't considered the ballistics of a 70 lb table. That may 

Re: [Emc-users] switching to a slower spi driver to see if it works,

[Gene Heskett]

On Wednesday 17 May 2017 10:38:23 Bertho Stultiens wrote:

> On 05/17/2017 12:50 PM, Gene Heskett wrote:
> [snip]
>
> > I can't hold the probe in contact, retrigger the scope to capture
> > the next snapshot, and hit the up-arrow then a return to initiate
> > the next signals existence as linuxcnc starts up. Birth defect I
> > guess, I'd need 6 arms, all steadier than the 2 I do have.  Or 3 of
> > me in telepathic contact. :)
>
> Isn't this why you build CNC machines to help you?
>
Something like that, but as you note below, machinery grows to occupy all 
available space.  And I'm about there, darnit.

He who dies with the most toy's is still dead though.

> Hm, there is an error in here somewhere, need machine to build machine
> to debug machine to build machine... Recursion detected, no more stack
> space left, core dumped.

And occasionally, a deep inspection of the core dump does come up with a 
better answer.

> Well, it was a thought anyway ;-)


Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] switching to a slower spi driver to see if it works,

[Bertho Stultiens]

On 05/17/2017 12:50 PM, Gene Heskett wrote:
[snip]
> I can't hold the probe in contact, retrigger the scope to capture the 
> next snapshot, and hit the up-arrow then a return to initiate the next 
> signals existence as linuxcnc starts up. Birth defect I guess, I'd need 
> 6 arms, all steadier than the 2 I do have.  Or 3 of me in telepathic 
> contact. :)

Isn't this why you build CNC machines to help you?

Hm, there is an error in here somewhere, need machine to build machine
to debug machine to build machine... Recursion detected, no more stack
space left, core dumped.

Well, it was a thought anyway ;-)

-- 
Greetings Bertho

(disclaimers are disclaimed)

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Re: [Emc-users] Best cam linux/open for additive manufactory

[giorgio foga]

I know these ... never try kicad ... but try more linux cad  actually most 
part of these works in 3d model but you neet to make a lot of code for use it 
in similar way to (for exe.) Inventor from 2008. Bend in most case is only a 
"mirage"... I know USAF or NASA (not remember now) have make an open cad (I 
think USAF or other Military USA office because I remember a simulation 3d of 
tank shot) ... and i try to use it into 2010  really much code to write for 
use it.

So I know quite well linux cad situation .


Any how I hope with 3d print "revolution" (in europe has already passed but it 
is going to be revived due to several inventions in various states) something 
was moove in that direction. The program  indicate to mee from various user is 
all valid and think i try all next mount when my 1500*1200*800 3d print was 
terminated.


regards

giorgio



Da: Chris Albertson 
Inviato: mercoledì 17 maggio 2017 06.49
A: Enhanced Machine Controller (EMC)
Oggetto: Re: [Emc-users] Best cam linux/open for additive manufactory

I like free open source software too.  In fact I finally switched from
Eagle to Kicad for schematics and PCB design,   IN the past Eagle worked
and Kicad as a development process.  Kicad caught up because CERN (the
physics lab in Europe) adopted and funded Kicad.

But open source CAD/CAM is just not there yet.  You simply can not draw a
part and then send it to a four axis milling machine using open source
software. When that is possible I'll do it.

Yes Autodesk will ask you to pay a for Fusion.  It is not free for everyone
so you don't have to be suspicious of them charging for it one day. They
are already asking for money.   But it's free for hobby, student and small
startups.  They have a sustainable business model, charge a subscription to
those who can afford it and don't bother asking for money from those who
don't have money.

What FreeCAD needs is someone to adopt it like KiCad, someone with a few
million dollars to spend.



On Tue, May 16, 2017 at 2:09 PM, andy pugh  wrote:

> On 16 May 2017 at 19:05, Chris Albertson 
> wrote:
> > Autodesk Fusion is 3D CAD software for making 3D designs.
>
> It's great, suspiciously so. But it does't run on Linux, which was a
> requirement in the original post.
>
> --
> atp
> "A motorcycle is a bicycle with a pandemonium attachment and is
> designed for the especial use of mechanical geniuses, daredevils and
> lunatics."
> — George Fitch, Atlanta Constitution Newspaper, 1916
>
> 
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>



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Re: [Emc-users] Best cam linux/open for additive manufactory

[giorgio foga]

I read now... I use freeCAD, but i have no time to learn  me how to use so well 
... I'm an autocat/autodesk user from 1989 ... in my work FEA analysis is 
slower than my experience. So real rarely use it (maybe 1-2 time some years 
ago?)


regards

giorgio


Da: andy pugh 
Inviato: martedì 16 maggio 2017 23.12
A: Enhanced Machine Controller (EMC)
Oggetto: Re: [Emc-users] Best cam linux/open for additive manufactory

On 16 May 2017 at 20:21, Bruce Layne  wrote:
> The weird thing is, there is a very nice looking Finite
> Element Analysis module in FreeCAD.  Go figure.

FEA is a much more bounded problem than CAM. And you don't get a pile
o broken cutters to prove that the answers are wrong either.

--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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Re: [Emc-users] Best cam linux/open for additive manufactory

[giorgio foga]

you are in right  but it is my surprise on that  any how ... I have a 
cad system on office ... but I use FreeCad too with some difficult but it work 
great (never use for big project) ... my ideal it is to have all pc on linux 
... is a bad things? because the question.


regards

giorgio



Da: andy pugh 
Inviato: martedì 16 maggio 2017 23.09
A: Enhanced Machine Controller (EMC)
Oggetto: Re: [Emc-users] Best cam linux/open for additive manufactory

On 16 May 2017 at 19:05, Chris Albertson  wrote:
> Autodesk Fusion is 3D CAD software for making 3D designs.

It's great, suspiciously so. But it does't run on Linux, which was a
requirement in the original post.

--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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Re: [Emc-users] switching to a slower spi driver to see if it works,

[Gene Heskett]

On Wednesday 17 May 2017 01:47:17 Bertho Stultiens wrote:

> On 05/17/2017 04:24 AM, Gene Heskett wrote:
> [snip]
>
> > The ideal situation in this instance would be to mirror the design
> > of the 7i90 so as to rotate the 26 pin header 180 degrees, which
> > would allow the cable to be only an inch long.  Or mount the pi
> > upside down, which would have the same effect.  Humm, why not, I
> > have some looong standoffs?  While I'm waiting on 7i42TA's, why not
> > try it?  More than one way to skin this scrawny cat.
>
> Reducing the cable's length to an inch would help. Then the
> transmission line characteristics would be much less a problem at
> 50MHz.
>
> >  Why is it I think best while writing
> > about a problem? Can't be the age of the wet ram.  Or is it... :(
>
> It is called reflection of your own thoughts ;-) It works very well
> while doing something completely different (like taking some time on
> the toilet).
>
> >> BTW, I think that not only the probe tip has influence, but also
> >> where your probe's ground-lead is placed (and not that fluffy long
> >> aligator-clip lead).
> >
> >  Chuckle, guilty yur honor, but its only a  4" lead. :) In this case
> > clipped onto a corner of a usb sockets frame.
>
> Well, using the default ground-lead on the probe at high frequency
> makes anything you see on the scope suspect. You do still have those
> springy clips that come with the probes, which clip onto the tip's
> ground-ring?

Someplace, but to use them I'd need three things.
1. A ground it could reach.
2. jigs to hold the probes in constant contact since there are no 
gripping hooks.
3. 6 arms & hands.

I can't hold the probe in contact, retrigger the scope to capture the 
next snapshot, and hit the up-arrow then a return to initiate the next 
signals existence as linuxcnc starts up. Birth defect I guess, I'd need 
6 arms, all steadier than the 2 I do have.  Or 3 of me in telepathic 
contact. :)

> With your confession, I'd be expecting ringing on the signals you
> measured. That makes me wonder if your probe is properly impedance
> matched to your scope... Maybe time to test and recalibrate the probes
> on the 1kHz scope reference?

BTDT, many times. For this sort of thing, the scopes need a 100khz test 
signal, and an isolated ground immediately adjacent, but this one has 
neither, dammit.

The scope itself is running on a ground isolation adapter, so I'm not 
getting the ground loop noises from that in my displays, nor is power 
applied to the motors as I have that tied to the motion enable gui 
button. So yes, I do understand that the scope pix I posted links to 
yesterday are showing the effects of that 4" long ground lead.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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