Re: [Emc-users] Posting order

[Gene Heskett]

On Sunday 31 March 2019 10:20:38 pm John Dammeyer wrote:

> > Would you like to compare birthdays John? I've had 84 of them
> > things. ;-)
> >
> > Cheers, Gene Heskett
>
> I have a few years to go but for some reason still feeling growly. 
> Went looking for some tintable alkyd enamel paint today to match the
> mill so I could paint the CNC cabinet.  What a wasted day.  No one
> carries this anymore.  All water based.
>
BTDT, total waste.

> Trouble is the frame already has oil based primer so I can't really
> put water based anything on it until it's totally dry.  Have to try an
> autobody supply store tomorrow.
>
> So then I started installing all the electronics onto the frame and
> dropped the 24 volt supply.  Probably still works.  But now with 20-20
> hind sight I don't think the way I'm installing it will make it easy
> to service (replace).
>
> Time for a beer.

Come to think of it, I believe its beer thirty.>
> John
>
>
>
>
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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)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


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Re: [Emc-users] Wanted, small engine whiz

[Gene Heskett]

On Sunday 16 June 2019 05:40:24 pm Przemek Klosowski wrote:

> On Tue, Jun 4, 2019 at 6:18 PM Gene Heskett  
wrote:
> > Come back, pull the carb and clean it, put it back totether, fires
> > right at about a 600 rev idle. Left the cleaner off because its oil
> > soaked.???
>
> No small engine expert I, but it possibly looks like oil-logged air
> filter. The crankcase is normally ventilated to the filtered air
> register, and if you tilt the engine the oil can flow through this
> tube and soak the filter, clogging it essentially. It would indeed
> blow smoke from all the oil incoming into the engine. It's easy to
> check---just take the filter out and if the engine runs without it and
> dies seconds after you place it back in, you got your guy.
>
Old msg. This caricature of Mt. Vesuvious runs well until above 1000 
revs, then suddenly spouts oil 3 feet up in the air from the vent hose 
on the bottom of the air filter.  And does it without the vacuum created 
by the well oiled filter. It also looses power and will die quickly if 
the throttle isn't closed instantly.  No unusual mechanical noises as 
its doing it.  Not even the tell tale of a loose rod is heard.

Anyway, its all moot as I took the locked up in 2nd gear rear axle out of 
the craftsman and replaced it with the same unit from the John Deere.  
Cuts grass like a golf green now.
>
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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)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


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Re: [Emc-users] Wanted, small engine whiz

[Przemek Klosowski]

On Tue, Jun 4, 2019 at 6:18 PM Gene Heskett  wrote:

> Come back, pull the carb and clean it, put it back totether, fires right
> at about a 600 rev idle. Left the cleaner off because its oil soaked.???

No small engine expert I, but it possibly looks like oil-logged air
filter. The crankcase is normally ventilated to the filtered air
register, and if you tilt the engine the oil can flow through this
tube and soak the filter, clogging it essentially. It would indeed
blow smoke from all the oil incoming into the engine. It's easy to
check---just take the filter out and if the engine runs without it and
dies seconds after you place it back in, you got your guy.


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Re: [Emc-users] LinuxCNC Processor

[Chris Albertson]

The Pi3+ has considerable faster CPU performance vs. the BBB.   Also twice
the RAM and good built-in WiFi.
Yes the Pi's Ethernet has limited bandwidth but how much is required?In
the old days people were using parallel ports on PCs and they have VERY
limited data rate compared to the Pi's Ethernet.t  The Pi's ethernet is not
a problem in our case as not much data is being sent.

But I keep wondering why not use an Intel i5 or i3?   You can buy a refurb
PC that came off lease foruder $200 and it will have a power supply and
case and a disk and run circles around the Pi. And if you want good
graphics the PC has a PCIe slot what you can drop in an Nvidia GPU.


One very promising chip in the stm32mp157.   It has an ARM Cortex M4, a
very powerfull real-time chip and also a dual-core ARM cortex A that can
run a real-time Linux. It's new so the only products are evaluation
kits form ST.   This could make for a stand-alone CNC controller.
https://www.st.com/en/microcontrollers-microprocessors/stm32mp157c.html

On Sun, Jun 16, 2019 at 12:31 PM John Dammeyer 
wrote:
>
> As far as I can see the only reason to consider a Pi, especially with the
lower number of I/O available is because it's got better video compared to
a Beagle.  Otherwise why even bother?
>
> John--

Chris Albertson
Redondo Beach, California

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Re: [Emc-users] LinuxCNC Processor

[bari]

On 6/16/19 2:29 PM, John Dammeyer wrote:
>> -Original Message-
>> From: bari [mailto:bari00...@gmail.com]
>> Sent: June-16-19 11:22 AM
>> To: emc-users@lists.sourceforge.net
>> Subject: Re: [Emc-users] LinuxCNC Processor
>>
>> On 6/16/19 1:09 PM, andy pugh wrote:
>>> I don't think that you can use the Pi Ethernet for LinuxCNC as it is on the
>>> USB bus.  (I might be wrong about one ot both of these points)
>>>
>>> Machinekit has the hal_gpio driver for Pi GPIO:
>>>
>> https://github.com/machinekit/machinekit/blob/master/src/hal/drivers/ha
>> l_gpio.c
>>> And I was actually surprised that that wasn't in LinuxCNC.
>>> Looking through the code they seem to also have similar drivers for the
>>> Orange Pi, CHIP and a few other boards.
>> The Orange and Banana Pi's use ARM SOC's with integrated Ethernet
>> controllers vs the Rpi with the Ethernet controller on USB.
>>
>> With the open Mali drivers we can have accelerated 2D/3D as well now and
>> use the Mesa cards over Ethernet. Some of the Banana pi's also have PCIe
>> as a third option (SPI, Ethernet, PCIe) to connect to Mesa FPGA cards.
>>
> As far as I can see the only reason to consider a Pi, especially with the 
> lower number of I/O available is because it's got better video compared to a 
> Beagle.  Otherwise why even bother?
>
>
The Beagle has PRU's (integrated micro-controllers) for software
stepping. The Banana and Orange Pi's do not have integrated
micro-controllers but the i.mx8 does.

 
https://www.nxp.com/products/processors-and-microcontrollers/arm-based-processors-and-mcus/i.mx-applications-processors/i.mx-8-processors/i.mx-8-family-arm-cortex-a53-cortex-a72-virtualization-vision-3d-graphics-4k-video:i.MX8

In addition it has SPI, PCIe and an integrated GB Ethernet controller
for real time expansion and open source 2D/3D GPU drivers for HD GUI's.
https://www.nxp.com/assets/images/en/block-diagrams/IMX8-BD.png






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Re: [Emc-users] LinuxCNC Processor

[John Dammeyer]

> -Original Message-
> From: bari [mailto:bari00...@gmail.com]
> Sent: June-16-19 11:22 AM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] LinuxCNC Processor
> 
> On 6/16/19 1:09 PM, andy pugh wrote:
> > I don't think that you can use the Pi Ethernet for LinuxCNC as it is on the
> > USB bus.  (I might be wrong about one ot both of these points)
> >
> > Machinekit has the hal_gpio driver for Pi GPIO:
> >
> https://github.com/machinekit/machinekit/blob/master/src/hal/drivers/ha
> l_gpio.c
> >
> > And I was actually surprised that that wasn't in LinuxCNC.
> > Looking through the code they seem to also have similar drivers for the
> > Orange Pi, CHIP and a few other boards.
> 
> The Orange and Banana Pi's use ARM SOC's with integrated Ethernet
> controllers vs the Rpi with the Ethernet controller on USB.
> 
> With the open Mali drivers we can have accelerated 2D/3D as well now and
> use the Mesa cards over Ethernet. Some of the Banana pi's also have PCIe
> as a third option (SPI, Ethernet, PCIe) to connect to Mesa FPGA cards.
> 

As far as I can see the only reason to consider a Pi, especially with the lower 
number of I/O available is because it's got better video compared to a Beagle.  
Otherwise why even bother?

John




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Re: [Emc-users] LinuxCNC Processor

[bari]

On 6/16/19 1:09 PM, andy pugh wrote:
> I don't think that you can use the Pi Ethernet for LinuxCNC as it is on the
> USB bus.  (I might be wrong about one ot both of these points)
>
> Machinekit has the hal_gpio driver for Pi GPIO:
> https://github.com/machinekit/machinekit/blob/master/src/hal/drivers/hal_gpio.c
>
> And I was actually surprised that that wasn't in LinuxCNC.
> Looking through the code they seem to also have similar drivers for the
> Orange Pi, CHIP and a few other boards.

The Orange and Banana Pi's use ARM SOC's with integrated Ethernet
controllers vs the Rpi with the Ethernet controller on USB.

With the open Mali drivers we can have accelerated 2D/3D as well now and
use the Mesa cards over Ethernet. Some of the Banana pi's also have PCIe
as a third option (SPI, Ethernet, PCIe) to connect to Mesa FPGA cards.


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Re: [Emc-users] LinuxCNC Processor

[andy pugh]

On Fri, 14 Jun 2019 at 03:20, John Dammeyer  wrote:

I think I meant time to do this for a Raspberry Pi and LinuxCNC without
> using an Ethernet Mesa Card.  Or maybe that's the only way to do it with a
> PI.


I don't think that you can use the Pi Ethernet for LinuxCNC as it is on the
USB bus.  (I might be wrong about one ot both of these points)

Machinekit has the hal_gpio driver for Pi GPIO:
https://github.com/machinekit/machinekit/blob/master/src/hal/drivers/hal_gpio.c

And I was actually surprised that that wasn't in LinuxCNC.
Looking through the code they seem to also have similar drivers for the
Orange Pi, CHIP and a few other boards.

Though as far as I can see, no documentation for any of them...

-- 
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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