Re: [Emc-users] recommendations on stepper driver power supply?

[Marius Liebenberg]

Doug
I would not worry about the supply if I was you. The stepper motor 
determines at what current you are running and we mostly run at far less 
that the drive rating. The voltage will determine how fast you can go 
but if you are happy with the max speed at 48v, you will be happy with 
the Gecko drivers as is.
I suggest that you put the lot together and then test the system. At 
that time you can decide if you want to change. I am willing to bet my 
sandwiches that you wont notice a single difference at all.


On 2013/05/28 07:55 PM, doug metzler wrote:
> I've been using a 48V switcher (Mean Well) with a 10A stepper driver, but
> I'm not happy with the stepper driver so I want to go to a Gecko which is
> only 7A, so I am hoping to compensate by going  up to a ~60V power supply,
> but DK/Mouser doesn't seem to carry anything appropriate for a reasonable
> price.
>
> Anyone have a suggestion for a suitable supply at a reasonable price?
>
> Thanks,
>
> DougM
>

-- 
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Tel: +27 12 743 6064
Fax: +27 86 551 8029
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Re: [Emc-users] Olinuxino/Beagleboard/bone, Xenomai, SPI?

[Jon Elson]

Michael Haberler wrote:
> hm, that'd be interesting. I'm somewhere around 2.1GB and am already pressed 
> to choose between nice-to-have-on-board packages. Maybe I've overlooked some 
> whoppers.
>
> The biggest win right now would be replacing the git repos by shallow clones 
> with just a bit of history should cut out some 300-400MB.
>   
One of the worries with the on-board memory is wearout (or just
corruption).  I gather there are ways to recover from an otherwise
"bricked" bone, but it seems to be a fairly complex process to
rebuild.  So, it might be better to not put the / directory on the
internal memory, but just UBOOT and the /boot directory,
which would be pretty much static.

Maybe this is all old info from working with the Beagle Board,
and doesn't happen on the Bone.

Jon

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Re: [Emc-users] Olinuxino/Beagleboard/bone, Xenomai, SPI?

[Michael Haberler]

Eric,

Am 29.05.2013 um 00:37 schrieb Eric Keller :

> On Tue, May 28, 2013 at 12:05 PM, Sebastian Kuzminsky  
> wrote:
> 
>> I'd be happy to help with this.  Any thoughts on what/when you want
>> merge with the mainline of LinuxCNC?
> 
> I would also like to help.  I need to test the old toolkit to see what
> is happening with that.

as for ARM boards, I think the most valuable contribution right now would be to 
document and provide working kernels, which is the #1 bottleneck; I am not sure 
the implications of that prerequisite have fully sunk in with the determined 
hardware shopaholics

the build and test process for a working Xenomai kernel is a bit involved and 
it's easy to overlook some step; the Xenomai folks do the best they can but 
some of the stuff going on over there is 'beyond my pay grade', as cradek would 
say

also, due to the device tree work the times of packaged, runtime configurable 
kernels for embedded platforms are not that far off, some initial results 
becoming visible; I am not sure this will apply to Xenomai but it could very 
well to RT-PREEMPT and that would be a big step forward towards the ease of 
installing a new kernel say on x86 off some major distro

the linuxCNC build per se really is nothing new or particularly challenging for 
anybody who has ever replicated the steps 'Installing from git source' from the 
wiki, and I'd be pressed to note more than the extra configure options 

also, drivers for a wider variety of peripherals would be nice to have; not 
everything around LinuxCNC just has to be hard realtime and some I/O functions 
could well be provided through userland HAL components using stock kernel 
facilities like existing PWM device drivers and the like, for instance print 
nozzle temperature control

the third 'nice to have' item would be instructions to transition from some 
stock SD card/distro to a fully working system; usually there are few config 
files, permissions etc which need tweaking and it'd be nice to reduce the 
suffering by re-discovery here

btw GP Orcullo's build documentation on the Raspberry image build is very nice 
and complete, so keep those clones coming ;)

note that we're not restricted to x86 and ARM; Xenomai builds on Blackfins and 
ppc as well and then some, and RT-PREEMPT on likely an even wider range.

I think once we have the unified binary it will make sense to explore packing 
by architecture, say arm7l for a start; I think that'd be entirely possible 
eventually. Right now there isnt much point to that yet.

--

semi-related, I hear noises that the Beaglebone will sport an RT-PREEMPT kernel 
soon too, since it seems some major customer put in a formal request for that. 
Not necessarily better results to be expected, but at least a second option.

The #beagle IRC channel is going through a sudden bump of interest, it seems 
the Beaglebone has appeal to a wide range of users, and the folk hanging out on 
that channel are a bit pressed to keep up with the sudden influx of noobs


- Michael

> 
> I keep hoping to hear of some break out board replacement for the BBB
> because it would probably be useful to have a target to aim for.
> Eric
> 
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Re: [Emc-users] Olinuxino/Beagleboard/bone, Xenomai, SPI?

[Michael Haberler]

Am 29.05.2013 um 02:30 schrieb Kent A. Reed :

>> I have tried, but getting the image below 2GB requires IMO a bit too many 
>> functional compromises, at least using wheezy as a base, and under the 
>> assumption that a full development system and deep git clone is retained
>> 
>> also I think the idea of ramming a _development_ environment onto the 
>> builtin flash is an idea of limited usefulness to start with
>> 
>> what would make sense is to export a _production_ environment onto the 
>> builtin flash once done with the development builds; that surely can be done 
>> within the confines of 2GB
>> 
>> for that effort I happily defer to the BeagleBone LinuCNC volunteer force ;)
>> 
> 
> After you had made your original comment about shrinking the root 
> filesystem, I did some destructive tests, simply ripping out as many 
> documentation-oriented packages as seemed likely candidates, using 
> aptitude on your distribution in a running BBB. I didn't touch the 
> compilers or -dev libraries. I didn't keep good notes but it looked like 
> doing just what I did reduced the filesystem nearly 1GB (I didn't see if 
> what I had left would actually fit into the 2GB flash). The next time, 
> I'll be more methodical and keep better notes.

hm, that'd be interesting. I'm somewhere around 2.1GB and am already pressed to 
choose between nice-to-have-on-board packages. Maybe I've overlooked some 
whoppers.

The biggest win right now would be replacing the git repos by shallow clones 
with just a bit of history should cut out some 300-400MB.

-m




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Re: [Emc-users] Unimat Re: My LinuxCNC Router - It's Alive!

[John Alexander Stewart]

Gregg;


> To wear the rails on a Unimat must have taken a huge amount of use!
>
>
Nah - the stepper motor brackets actually needed the beds to be extended in
order for them to fit. (the aluminium stepper motor brackets are actually
NOT fastened to the bed rails - they float as the couplings to the feed
screws are solid.

The original bed ways were a bit old-age stained, but were ok - just too
short! They came out fairly easily after 60 odd years in place.

I had 12mm ground "drill rod" here at home, but needed 8mm, which I picked
up a short length at the British Harrogate show early May for pounds 2.50,
which gave me more than enough for the cross slide ways.

I don't think the lathe had much use, just decades and decades of sitting
around.

JohnS.
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Re: [Emc-users] Olinuxino/Beagleboard/bone, Xenomai, SPI?

[Kent A. Reed]

On 5/28/2013 11:43 AM, Michael Haberler wrote:
> Am 28.05.2013 um 16:35 schrieb Kent A. Reed :
>
>> On 5/28/2013 3:50 AM, Michael Haberler wrote:
>>> well it runs off an SD card root filesystem to start with, and Ethernet is 
>>> in place so yes
>> Since Anders mentioned datalogging...
>>
>> I think I would use the USB port for the purpose because the Beaglebones
>> employ microSD cards, not SD cards. Maybe it's just me but the SD
>> card/socket seem marginally more robust for frequent changeouts.
>>
>> As an aside, in its current state, the O/S + LinuxCNC are too big to fit
>> into the Beaglebone Black's internal storage so at least some of the
>> microSD card capacity is needed for the system itself. I know Michael
>> has thought about paring down the size requirement by getting rid of
>> desktop dross but I don't think he's done the exercise yet (nudge nudge
>> wink wink).
> I have tried, but getting the image below 2GB requires IMO a bit too many 
> functional compromises, at least using wheezy as a base, and under the 
> assumption that a full development system and deep git clone is retained
>
> also I think the idea of ramming a _development_ environment onto the builtin 
> flash is an idea of limited usefulness to start with
>
> what would make sense is to export a _production_ environment onto the 
> builtin flash once done with the development builds; that surely can be done 
> within the confines of 2GB
>
> for that effort I happily defer to the BeagleBone LinuCNC volunteer force ;)
>

After you had made your original comment about shrinking the root 
filesystem, I did some destructive tests, simply ripping out as many 
documentation-oriented packages as seemed likely candidates, using 
aptitude on your distribution in a running BBB. I didn't touch the 
compilers or -dev libraries. I didn't keep good notes but it looked like 
doing just what I did reduced the filesystem nearly 1GB (I didn't see if 
what I had left would actually fit into the 2GB flash). The next time, 
I'll be more methodical and keep better notes.

Regards,
Kent






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Re: [Emc-users] Olinuxino/Beagleboard/bone, Xenomai, SPI?

[andy pugh]

On 28 May 2013 23:45, Charles Steinkuehler  wrote:

> I've been considering whipping up something (schematic or circuit
> board) if it would be helpful, but I'm not sure who has interest in
> using the 'Bone for something that _isn't_ a 3D printer.

Not quite the same thing, but I just ordered a batch of PCBs to
convert RPi IO to 5V.
https://picasaweb.google.com/lh/photo/IJuvikJNkFbFtG-35Sv_qNMTjNZETYmyPJy0liipFm0?feat=directlink

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Re: [Emc-users] Olinuxino/Beagleboard/bone, Xenomai, SPI?

[Ralph Stirling]

Very high on my priority list for this summer is a
good BBB breakout board.  I will be designing for
industrial 24v I/O with opto isolation, and may
include mosfet h-bridges for driving stepper or
servo motors from the TPU's.  I haven't started
studying the BBB yet to come up with an appropriate
design.

-- Ralph

From: Eric Keller [eekel...@psu.edu]
Sent: Tuesday, May 28, 2013 4:01 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Olinuxino/Beagleboard/bone, Xenomai, SPI?

On Tue, May 28, 2013 at 6:45 PM, Charles Steinkuehler
 wrote:

> What sort of break-out board are you wanting to see?

Charles,
Basically I just want a printer port output.  I have thought of just
getting one of the proto board capes, but it seems like a BOB
interface would be pretty widely used.  I think you could run a
minimalist 3 axis machine including the gui with a BBB.  I have a
Shapeoko which would be a great application of a BBB.

I hate to admit I don't know how many gpio pins there are available,
but I suspect it's more than one BOB worth even with HDMI.  Can anyone
verify that?
Eric

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Re: [Emc-users] Olinuxino/Beagleboard/bone, Xenomai, SPI?

[Eric Keller]

On Tue, May 28, 2013 at 6:45 PM, Charles Steinkuehler
 wrote:

> What sort of break-out board are you wanting to see?

Charles,
Basically I just want a printer port output.  I have thought of just
getting one of the proto board capes, but it seems like a BOB
interface would be pretty widely used.  I think you could run a
minimalist 3 axis machine including the gui with a BBB.  I have a
Shapeoko which would be a great application of a BBB.

I hate to admit I don't know how many gpio pins there are available,
but I suspect it's more than one BOB worth even with HDMI.  Can anyone
verify that?
Eric

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Re: [Emc-users] Olinuxino/Beagleboard/bone, Xenomai, SPI?

[Charles Steinkuehler]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

On 5/28/2013 5:37 PM, Eric Keller wrote:
> I keep hoping to hear of some break out board replacement for the
> BBB because it would probably be useful to have a target to aim
> for. Eric

What sort of break-out board are you wanting to see?

I am looking to use the BeBoPr and/or Replicape boards because I want
to interface to my 3D printer (so I need small-ish stepper drivers and
analog inputs for the thermistors).  If you're just looking to
replicate a parallel port on the 'Bone, that could be done with some
wires, or a few TTL-like buffer chips if you want to keep your 'Bone safe.

I've been considering whipping up something (schematic or circuit
board) if it would be helpful, but I'm not sure who has interest in
using the 'Bone for something that _isn't_ a 3D printer.

- -- 
Charles Steinkuehler
char...@steinkuehler.net
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Re: [Emc-users] Olinuxino/Beagleboard/bone, Xenomai, SPI?

[Eric Keller]

On Tue, May 28, 2013 at 12:05 PM, Sebastian Kuzminsky  wrote:

> I'd be happy to help with this.  Any thoughts on what/when you want
> merge with the mainline of LinuxCNC?

I would also like to help.  I need to test the old toolkit to see what
is happening with that.

I keep hoping to hear of some break out board replacement for the BBB
because it would probably be useful to have a target to aim for.
Eric

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Re: [Emc-users] Olinuxino/Beagleboard/bone, Xenomai, SPI?

[Gregg Eshelman]

--- On Tue, 5/28/13, Michael Haberler  wrote:

> what would make sense is to export a _production_
> environment onto the builtin flash once done with the
> development builds; that surely can be done within the
> confines of 2GB

With everything configured for a specific machine, all functioning just right, 
don'ttouchityou'llbreakit.



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[Emc-users] Unimat Re: My LinuxCNC Router - It's Alive!

[Gregg Eshelman]

--- On Tue, 5/28/13, John Alexander Stewart  wrote:

> I've been playing around with my little Unimat CNC lathe,
> now that I have
> the stepper motors working properly (issue with me, not
> the technology)
> 
> You can see its first moves if you look at
> 
> http://youtu.be/PXypuMmQFEI
> 
> Took it apart last night for final assembly; looking forward
> to seeing what
> it can do, then going on to my EMCO Compact-8 CNC
> conversion.

That's one big benefit to a lathe using precision round bars for the bed and 
slides, easy rebuilding, especially if the carriage and slides use replaceable 
bushings or can be bored out for bushings.

To wear the rails on a Unimat must have taken a huge amount of use!

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Re: [Emc-users] recommendations on stepper driver power supply?

[Dave]

Antek has been around for several years.

They used to advertise on Ebay also.

Dave  Cole

On 5/28/2013 3:05 PM, doug metzler wrote:
> I like the Anteks!  I am going to try the PS-10N63R12
>
> Thank you, you guys are great.
>
> DougM
>
>
>
> On Tue, May 28, 2013 at 11:28 AM, Bruce Layne
> wrote:
>
>
>> There are $60 switching power supplies from China.  I bought a CNC kit
>> with the stepper motors and stepper motor drives and the power supplies
>> and it came with three of these.  They're available in 300W and larger
>> sizes, with little difference in cost.
>>
>>
>> http://www.ebay.com/sch/i.html?_sacat=0&_from=R40&_nkw=%2860v%2C+60+v%2C+60+volt%29+switching+power+supply&_sop=15
>>
>> I've ordered a lot of these for various CNC projects.  Buying them not
>> bundled in a kit has resulted in problems with shipping.  One company
>> put the power supply in a plastic envelope with no packaging and dropped
>> it in the mail.  They're usually shrink wrapped or packaged in thin
>> cardboard "gift boxes" which are inadequate for shipping.  The only way
>> to get one to survive is to put in in a sturdy outer box with some
>> surrounding bubble wrap or similar packaging, but most sellers don't do
>> that.  You might offer to pay extra for proper packaging, although that
>> shouldn't be required.  It should be the seller's responsibility IMO.
>>
>> If you can get one to arrive that doesn't have components rattling
>> around inside, they're usually quite reliable.
>>
>> Or, you could shop eBay for a suitable transformer, bridge rectifier and
>> large electrolytic filter capacitors and build your own linear power
>> supply.
>>
>> If you don't mind paying a bit more, there's always the very nice AnTek
>> toroidal power supplies.  They package their supplies very well.
>>
>> http://www.antekinc.com
>>
>> Good luck!
>>
>>
>>
>> On 05/28/2013 01:55 PM, doug metzler wrote:
>>  
>>> I've been using a 48V switcher (Mean Well) with a 10A stepper driver, but
>>> I'm not happy with the stepper driver so I want to go to a Gecko which is
>>> only 7A, so I am hoping to compensate by going  up to a ~60V power
>>>
>> supply,
>>  
>>> but DK/Mouser doesn't seem to carry anything appropriate for a reasonable
>>> price.
>>>
>>> Anyone have a suggestion for a suitable supply at a reasonable price?
>>>
>>> Thanks,
>>>
>>> DougM
>>>
>>>
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Re: [Emc-users] recommendations on stepper driver power supply?

[doug metzler]

I like the Anteks!  I am going to try the PS-10N63R12

Thank you, you guys are great.

DougM



On Tue, May 28, 2013 at 11:28 AM, Bruce Layne
wrote:

> There are $60 switching power supplies from China.  I bought a CNC kit
> with the stepper motors and stepper motor drives and the power supplies
> and it came with three of these.  They're available in 300W and larger
> sizes, with little difference in cost.
>
>
> http://www.ebay.com/sch/i.html?_sacat=0&_from=R40&_nkw=%2860v%2C+60+v%2C+60+volt%29+switching+power+supply&_sop=15
>
> I've ordered a lot of these for various CNC projects.  Buying them not
> bundled in a kit has resulted in problems with shipping.  One company
> put the power supply in a plastic envelope with no packaging and dropped
> it in the mail.  They're usually shrink wrapped or packaged in thin
> cardboard "gift boxes" which are inadequate for shipping.  The only way
> to get one to survive is to put in in a sturdy outer box with some
> surrounding bubble wrap or similar packaging, but most sellers don't do
> that.  You might offer to pay extra for proper packaging, although that
> shouldn't be required.  It should be the seller's responsibility IMO.
>
> If you can get one to arrive that doesn't have components rattling
> around inside, they're usually quite reliable.
>
> Or, you could shop eBay for a suitable transformer, bridge rectifier and
> large electrolytic filter capacitors and build your own linear power
> supply.
>
> If you don't mind paying a bit more, there's always the very nice AnTek
> toroidal power supplies.  They package their supplies very well.
>
> http://www.antekinc.com
>
> Good luck!
>
>
>
> On 05/28/2013 01:55 PM, doug metzler wrote:
> > I've been using a 48V switcher (Mean Well) with a 10A stepper driver, but
> > I'm not happy with the stepper driver so I want to go to a Gecko which is
> > only 7A, so I am hoping to compensate by going  up to a ~60V power
> supply,
> > but DK/Mouser doesn't seem to carry anything appropriate for a reasonable
> > price.
> >
> > Anyone have a suggestion for a suitable supply at a reasonable price?
> >
> > Thanks,
> >
> > DougM
> >
> --
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> >
>
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Re: [Emc-users] Axis error

[Andrew]

2013/5/28 andy pugh 

> On 28 May 2013 14:09, Andrew  wrote:
>
> > Then I tried to include your changes to current axis.py and compiled
> again.
> > Now I see axis.set-world mode pin in machine configuration, but when I
> try
> > to use it error pops
> >
> > ja3-delta.hal:284: Pin 'axisui.set-world-mode' does not exist
>
> This is just the normal "no gui pins until the gui is loaded" thing,
> anything that rweferences the new pin needs to be in the postgui
> halfile.
>
> Thanks a lot! Never used gui pins before. I'll try that tomorrow.

Andrew
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Re: [Emc-users] recommendations on stepper driver power supply?

[Bruce Layne]

There are $60 switching power supplies from China.  I bought a CNC kit 
with the stepper motors and stepper motor drives and the power supplies 
and it came with three of these.  They're available in 300W and larger 
sizes, with little difference in cost.

http://www.ebay.com/sch/i.html?_sacat=0&_from=R40&_nkw=%2860v%2C+60+v%2C+60+volt%29+switching+power+supply&_sop=15

I've ordered a lot of these for various CNC projects.  Buying them not 
bundled in a kit has resulted in problems with shipping.  One company 
put the power supply in a plastic envelope with no packaging and dropped 
it in the mail.  They're usually shrink wrapped or packaged in thin 
cardboard "gift boxes" which are inadequate for shipping.  The only way 
to get one to survive is to put in in a sturdy outer box with some 
surrounding bubble wrap or similar packaging, but most sellers don't do 
that.  You might offer to pay extra for proper packaging, although that 
shouldn't be required.  It should be the seller's responsibility IMO.

If you can get one to arrive that doesn't have components rattling 
around inside, they're usually quite reliable.

Or, you could shop eBay for a suitable transformer, bridge rectifier and 
large electrolytic filter capacitors and build your own linear power supply.

If you don't mind paying a bit more, there's always the very nice AnTek 
toroidal power supplies.  They package their supplies very well.

http://www.antekinc.com

Good luck!



On 05/28/2013 01:55 PM, doug metzler wrote:
> I've been using a 48V switcher (Mean Well) with a 10A stepper driver, but
> I'm not happy with the stepper driver so I want to go to a Gecko which is
> only 7A, so I am hoping to compensate by going  up to a ~60V power supply,
> but DK/Mouser doesn't seem to carry anything appropriate for a reasonable
> price.
>
> Anyone have a suggestion for a suitable supply at a reasonable price?
>
> Thanks,
>
> DougM
> --
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>


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Re: [Emc-users] recommendations on stepper driver power supply?

[John Alexander Stewart]

Does your switching power supply have an adjusting pot? I've turned my two
down from 48v to closer to 40v, but maybe they can go up 8v as well?
 (KeilingInc 48v switchers)

For the price of a "flick of the wrist" you might get very close to what
you want.

John A. Stewart


On Tue, May 28, 2013 at 1:55 PM, doug metzler wrote:

> I've been using a 48V switcher (Mean Well) with a 10A stepper driver, but
> I'm not happy with the stepper driver so I want to go to a Gecko which is
> only 7A, so I am hoping to compensate by going  up to a ~60V power supply,
> but DK/Mouser doesn't seem to carry anything appropriate for a reasonable
> price.
>
> Anyone have a suggestion for a suitable supply at a reasonable price?
>
> Thanks,
>
> DougM
>
> --
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[Emc-users] recommendations on stepper driver power supply?

[doug metzler]

I've been using a 48V switcher (Mean Well) with a 10A stepper driver, but
I'm not happy with the stepper driver so I want to go to a Gecko which is
only 7A, so I am hoping to compensate by going  up to a ~60V power supply,
but DK/Mouser doesn't seem to carry anything appropriate for a reasonable
price.

Anyone have a suggestion for a suitable supply at a reasonable price?

Thanks,

DougM
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Re: [Emc-users] My LinuxCNC Router - It's Alive!

[John Alexander Stewart]

Andy;

On Tue, May 28, 2013 at 11:36 AM, andy pugh  wrote:

> On 28 May 2013 14:37, John Alexander Stewart  wrote:
>
> > http://youtu.be/PXypuMmQFEI
>
> 
> http://www.zappautomation.co.uk/en/rsw-ballnuts/80-r10-03r3-rsw.htm


Actually, the size creep is one I'm worried about - my Compact-8 is next,
which will not be as portable as this little unimat... ;-)

I really don't know what I'll use this CNC lathe for, excepting
demonstrations at fairs, etc.

(also, I have a 5i25 in that computer running this; after home switches are
in place, it'll be interesting to see how fast the axes go with the 5i25
driving things - 20mm/sec seems fine with soft stepping as of last night's
testing)

JohnS.
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Re: [Emc-users] Olinuxino/Beagleboard/bone, Xenomai, SPI?

[Sebastian Kuzminsky]

On 5/28/13 09:43 , Michael Haberler wrote:
>
> Am 28.05.2013 um 16:35 schrieb Kent A. Reed :
>>
>> As an aside, in its current state, the O/S + LinuxCNC are too big to fit
>> into the Beaglebone Black's internal storage so at least some of the
>> microSD card capacity is needed for the system itself. I know Michael
>> has thought about paring down the size requirement by getting rid of
>> desktop dross but I don't think he's done the exercise yet (nudge nudge
>> wink wink).
>
> I have tried, but getting the image below 2GB requires IMO a bit too many 
> functional compromises, at least using wheezy as a base, and under the 
> assumption that a full development system and deep git clone is retained
>
> also I think the idea of ramming a _development_ environment onto the builtin 
> flash is an idea of limited usefulness to start with
>
> what would make sense is to export a _production_ environment onto the 
> builtin flash once done with the development builds; that surely can be done 
> within the confines of 2GB
>
> for that effort I happily defer to the BeagleBone LinuCNC volunteer force ;)

I'd be happy to help with this.  Any thoughts on what/when you want 
merge with the mainline of LinuxCNC?


-- 
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Re: [Emc-users] Olinuxino/Beagleboard/bone, Xenomai, SPI?

[W. Martinjak]

In spite of myself

http://www.youtube.com/watch?v=ona-RhLfRfc

;)

On 2013-05-28 16:35, Kent A. Reed wrote:
> On 5/28/2013 3:50 AM, Michael Haberler wrote:
>> well it runs off an SD card root filesystem to start with, and Ethernet is 
>> in place so yes
> Since Anders mentioned datalogging...
>
> I think I would use the USB port for the purpose because the Beaglebones
> employ microSD cards, not SD cards. Maybe it's just me but the SD
> card/socket seem marginally more robust for frequent changeouts.
>
> As an aside, in its current state, the O/S + LinuxCNC are too big to fit
> into the Beaglebone Black's internal storage so at least some of the
> microSD card capacity is needed for the system itself. I know Michael
> has thought about paring down the size requirement by getting rid of
> desktop dross but I don't think he's done the exercise yet (nudge nudge
> wink wink).
>
> Regards,
> Kent
>
>
>
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nur ihre Gegner sterben nach und nach"

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Re: [Emc-users] Olinuxino/Beagleboard/bone, Xenomai, SPI?

[Michael Haberler]

Am 28.05.2013 um 16:35 schrieb Kent A. Reed :

> On 5/28/2013 3:50 AM, Michael Haberler wrote:
>> well it runs off an SD card root filesystem to start with, and Ethernet is 
>> in place so yes
> 
> Since Anders mentioned datalogging...
> 
> I think I would use the USB port for the purpose because the Beaglebones 
> employ microSD cards, not SD cards. Maybe it's just me but the SD 
> card/socket seem marginally more robust for frequent changeouts.
> 
> As an aside, in its current state, the O/S + LinuxCNC are too big to fit 
> into the Beaglebone Black's internal storage so at least some of the 
> microSD card capacity is needed for the system itself. I know Michael 
> has thought about paring down the size requirement by getting rid of 
> desktop dross but I don't think he's done the exercise yet (nudge nudge 
> wink wink).

I have tried, but getting the image below 2GB requires IMO a bit too many 
functional compromises, at least using wheezy as a base, and under the 
assumption that a full development system and deep git clone is retained

also I think the idea of ramming a _development_ environment onto the builtin 
flash is an idea of limited usefulness to start with

what would make sense is to export a _production_ environment onto the builtin 
flash once done with the development builds; that surely can be done within the 
confines of 2GB

for that effort I happily defer to the BeagleBone LinuCNC volunteer force ;)

- Michael

> Regards,
> Kent
> 
> 
> 
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Re: [Emc-users] My LinuxCNC Router - It's Alive!

[andy pugh]

On 28 May 2013 14:37, John Alexander Stewart  wrote:

> http://youtu.be/PXypuMmQFEI


http://www.zappautomation.co.uk/en/rsw-ballnuts/80-r10-03r3-rsw.html


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[Emc-users] My spindle headache, question 10ee31

[Gene Heskett]

Greetings all;

I think I have a relay config drawn up that will do this, however it will 
need a 3rd ice cube, mainly because I was never any good with relay logic 
in the first place.  I'd never met that critter till we were doing the pan-
tilt-light controls for the Trieste's only trip down into the mohole in 
another life about 53 years ago.  One of our vice presidents (they made 
everybody who was part of the startup a vice president so they could pay 
them a dollar a month salary) was tasked with using the 3 wires the navy 
gave us thru the side of the gondola to run the cameras with.  Two cameras, 
2 pans, two tilts, and two camera mounted banks of lights, all to be done 
with 3 pushbuttons.  I have no clue how much sleep Joe Petite lost that 
night, but he came back in the morning with a diagram that used 8 output 
relays, to do the real work, and a small logic board, all in dpdt relays, 
to do it, and it worked first time.  One 3 wires, using sequential button 
pushes.  It might as well have been black magic to me, and you'll note that 
integrated circuit logic was not yet invented in '59, so all that was 
strange to me.

So, while its not wired up yet, it does look like it will do as I want 
after putting the C41 in the US mode which gives mutually exclusive fwd and 
rev signals.

Now what I want to do in the hal file, is load 1 or 2 more instances of 
and2, and one instance of oneshot.

Shutting it off from 1200 revs takes around 12 seconds to coast to a stop 
without a braking resistor, so the oneshot will start out as a 15 second 
timeout.

I want this timeout to be triggered by any of the axis spindle stop button, 
an M5 from the mdi, or in the .ngc code file.

Can motion.spindle.stop supply this trigger?

Then, while this oneshot is running down, I want to disable pwmgen and pid 
by running those enables thru an and2.

BUT, this won't stop the gcode execution & force the code to wait, or send 
any mouse clicks etc to /dev/null where they belong, and I don't want it to 
enable that stuff after a silent timeout catching me by surprise with a 
sudden startup, so where in this chain of command do I insert an and2 
instance to block it?

I expect to be forced to write some G4 P15's (or whatever the delay is once 
I get braking working) into the code, but while thats a nice reminder, it 
isn't idijit proof.  That finger pointing at the idijit is of course is 
pointing at me. :(


Thanks all.

Cheers, Gene
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My web page:  is up!
My views 

BOFH excuse #192:

runaway cat on system.
A pen in the hand of this president is far more
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Re: [Emc-users] Olinuxino/Beagleboard/bone, Xenomai, SPI?

[Kent A. Reed]

On 5/28/2013 3:50 AM, Michael Haberler wrote:
> well it runs off an SD card root filesystem to start with, and Ethernet is in 
> place so yes

Since Anders mentioned datalogging...

I think I would use the USB port for the purpose because the Beaglebones 
employ microSD cards, not SD cards. Maybe it's just me but the SD 
card/socket seem marginally more robust for frequent changeouts.

As an aside, in its current state, the O/S + LinuxCNC are too big to fit 
into the Beaglebone Black's internal storage so at least some of the 
microSD card capacity is needed for the system itself. I know Michael 
has thought about paring down the size requirement by getting rid of 
desktop dross but I don't think he's done the exercise yet (nudge nudge 
wink wink).

Regards,
Kent



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Re: [Emc-users] My LinuxCNC Router - It's Alive!

[John Alexander Stewart]

Bruce;

Good for you!

I've been playing around with my little Unimat CNC lathe, now that I have
the stepper motors working properly (issue with me, not the technology)

You can see its first moves if you look at

http://youtu.be/PXypuMmQFEI

Took it apart last night for final assembly; looking forward to seeing what
it can do, then going on to my EMCO Compact-8 CNC conversion.

John A. Stewart.
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Re: [Emc-users] Axis error

[andy pugh]

On 28 May 2013 14:09, Andrew  wrote:

> Then I tried to include your changes to current axis.py and compiled again.
> Now I see axis.set-world mode pin in machine configuration, but when I try
> to use it error pops
>
> ja3-delta.hal:284: Pin 'axisui.set-world-mode' does not exist

This is just the normal "no gui pins until the gui is loaded" thing,
anything that rweferences the new pin needs to be in the postgui
halfile.

-- 
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[Emc-users] My LinuxCNC Router - It's Alive!

[Bruce Layne]

http://youtu.be/iiuTNsUVC0A
(lame 30 second motor jogging video)

YouTube isn't letting me edit the video description.  :-(

I finally wired enough of the electronics that I was able to jog the X 
axis using LinuxCNC.  I'm liking the JogIt pendant.  It's very handy.

I bought the larger NEMA 23 stepper motors, stepper motor drives, 
stepper motor power supplies and the DB25-1205 optoisolated parallel 
port breakout board as a kit from a Chinese company on eBay.  There was 
no documentation.  It's not rocket science, but there should have been a 
minimal system schematic of these components, both for the optoisolated 
power supply version and for using the PC power supplied outputs to the 
optoisolated inputs on the stepper motor drives.

Apparently, the stepper motor drive's ENABLE signal actually disables 
motion on that axis.  Unwired, there is an internal pullup to enable 
motion.  Wiring +5V to the ENABLE+ signal and 0V to the ENABLE- signal 
disables motion!  It took me a couple of minutes to debug that 
undocumented feature.  Something must have been lost in the translation.

Now that one axis is debugged and moving, I can wire the rest of the 
electronics, mount the electronic control panel on the side of the 
router table base and dust collection enclosure, permanently wire the 
motors and fluorescent lights and power cord, mount the spindle motor 
and finish wiring it, run the 4" flex hose for the dust collection 
system, install the water cooling for the spindle motor and cross this 
project off as #1 in my Summer Of Projects.  Most of the parts are 
purchased for the other projects.  Just need to get a Round Tuit.

2) Build my very simple CNC Sherline Mini Lathe.

3) Finish building the back yard shed.

4) Build the CNC laser.

5) CNC conversion for my Grizzly G1006 benchtop milling machine.

6) CNC conversion for my Clausing 10X24 lathe.

7) Finish assembling my two Hadron ORD Bot 3D printers.

It should be a fun Summer Of Projects.



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Re: [Emc-users] Olinuxino/Beagleboard/bone, Xenomai, SPI?

[Michael Haberler]

Hi Anders,

on the Beaglebone status:

I had prepared an SD image with a 3.2.21 xenomai kernel; literally hours after 
it was out it became apparent there is a fatal bug in the 3.2.21 xenomai patch 
and it will be retracted

by now I do have a working xenomai kernel based on 3.8.13; however the 3.8 
series is a big leap from 3.2 as far as ARN device suppport goes so Charles, 
Ian, Kent and myself are still figuring how to make device tree work for us 
under the boundary condition that we understand why it does or doesnt

that said, the only remaining issue is the usage of the PRU under 3.8.13; I 
need to fix some minor breakage in the userland PRU support, "just work"; as 
soon as that verifies to work, I'll update the SD image

if you can get along without the PRU code for a few days, the kernels (vanilla 
and xenomai) are here: 
http://static.mah.priv.at/public/beaglebone/starterkit/deploy

Am 28.05.2013 um 08:49 schrieb Anders Wallin :

> Hi all,
> 
> What is the status on small single-board computers like Olinuxino and/or
> BeagleBoard/Bone wrt. Xenomai and LinuxCNC/HAL?
> 
> In particular I am looking for a solution with:
> - Xenomai + HAL for real-time PID loops with 1ms thread

that should work fine

> - SPI + GPIO for communication with custom made ADC and DAC boards (HAL
> driver available?)

there is a hal_bb_gpio driver by Ian which I verified to work; I havent seen a 
full configuration both with Charles stepgen and this driver, but I dont expect 
any major problems

as for SPI, there's nothing stock for the BB and LinuxCNC, but the picnc HAL 
driver for the Raspberry would be a good starting point; at the end it's just 
memory-mapped register fiddling and that isnt fundamentally different between 
boards or peripherals for that matter

so GPIO: yes, SPI: a bit of work required

> - Small screen or touch-screen for status display

the BB white supports various LCD capes I have no experience with
the BB black has an HDMI output ontop and I understand the Angstrom image 
supports gnome; however I have rested attempts to build LinuxCNC on the 
Angstrom image because just too many packages were missing; it should be 
possible though
I use Debian wheezy, but I havent explored how to get a X server running on the 
BB black; likely there is

note emcweb is a low-resource use UI, and already in my repo, so a web UI is an 
option too

> - SD-card for datalogging, Ethernet for long-term datalogging to database

well it runs off an SD card root filesystem to start with, and Ethernet is in 
place so yes

> 
> So far the most affordable solution seems to be Olinuxino:
> https://www.olimex.com/Products/OLinuXino/A13/

the BB black sells for $45/€45

I would think the total cost should bear in mind peripherals and your own work 
a bit, for instance the minor detail of an actually existing and working RT 
kernel for a given board; I dont know what the Olinuxino story is these days, 
but there are a lot of 'great deals' out there which will make superb doorstops 
as far as LinuxCNC is concerned

- Michael

> 
> comments? suggestions?
> 
> Anders
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