Re: [Emc-users] Any experience with Leadshine DM series stepper driver

[Chris Albertson]

I wonder if the AM series is not an older product line.   It is not
offered on the Leadshine website except if you hunt for PDF documents.
Copyright on the AM series docs is 2010.

Looked up closed loop offerings. (called "Easy Servo")  Yes very nice
but for a 3.0Nm system (one motor and one driver) the price  is $295
per axis vs $65 per axis for 3.0 Nm DM series.

On Mon, May 22, 2017 at 12:47 PM, andy pugh  wrote:
> On 22 May 2017 at 20:20,   wrote:
>> Bottom line, for the AM882 at least, yes, "super nice", "worth it at any 
>> price", "would never go back".
>
> That sounds like a ringing endorsement, but it might also be worth
> looking at the fully-closed-loop stepper systems from the same
> company.
>
> --
> 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] Any experience with Leadshine DM series stepper driver

[andy pugh]

On 22 May 2017 at 20:20,   wrote:
> Bottom line, for the AM882 at least, yes, "super nice", "worth it at any 
> price", "would never go back".

That sounds like a ringing endorsement, but it might also be worth
looking at the fully-closed-loop stepper systems from the same
company.

-- 
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] Any experience with Leadshine DM series stepper driver

[dannym]

Best thing is the digitally software-programmed ones.  You program in the exact 
current, microstepping, whether it uses the Enable line, whether it enabled the 
automatic stall detection...

And you can hit "auto-tune" on the motor, it takes over for a second and 
stimulates the motor and gets feedback and you can pull up a graph of its 
stability.  

You can set it for a midband self-generated test step sequence and manually 
adjust the midband resonance dampening.  Honestly could not find anything to 
dampen.  Already totally stable.

I use the Leadshine AM882 and A882H (higher voltage). The DM556 just seems to 
be an American-market rebranding of the AM882 with a somewhat higher price tag.

Bottom line, for the AM882 at least, yes, "super nice", "worth it at any 
price", "would never go back".

Danny

 Chris Albertson  wrote: 
> Has anyone used the Leadshine digital stepper drivers?   Do they
> really provide "smoother operation with less heat"?
> 
> I need to buy a stepper motor controller and notice that Leadshine
> offers three series of drivers.  The most common cheap driver for a 4
> amp motor is the M542.   But there is also the EM503 and DM556.  They
> offer a EM, DM and M series of drivers.
> 
> The DM and EM series have a digital DSP controller and they claim a
> mode where the driver tests the connected motor for both DC resistance
> and inductance and then adjusts the current/speed parameters to suit.
> The motor shaft vibrates while the test is underway (likely the
> controller is placing a small AC signal in the motor to measure
> inductance)
> 
> The DM and EM series can also reduce the current going to the motor
> after it has been at zero speed for one second, to reduce heating.
> 
> The DM and EM series have an RS-232 port so the parameters
> (resistance, inductance and idle current reduction) can be set from
> software rather then auto-tuned.
> 
> In addition the EM series driver can detect skipped steps without an
> additional sensor and raise a fault line that (I assume)
> EMC/MachineKit can detect.
> 
> 
> -- 
> 
> Chris Albertson
> Redondo Beach, California
> 
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Re: [Emc-users] Any experience with Leadshine DM series stepper driver

[Valerio Bellizzomi]

On Mon, 2017-05-22 at 11:53 -0700, Chris Albertson wrote:
> Has anyone used the Leadshine digital stepper drivers?   Do they
> really provide "smoother operation with less heat"?
> 
> I need to buy a stepper motor controller and notice that Leadshine
> offers three series of drivers.  The most common cheap driver for a 4
> amp motor is the M542.   But there is also the EM503 and DM556.  They
> offer a EM, DM and M series of drivers.
> 
> The DM and EM series have a digital DSP controller and they claim a
> mode where the driver tests the connected motor for both DC resistance
> and inductance and then adjusts the current/speed parameters to suit.
> The motor shaft vibrates while the test is underway (likely the
> controller is placing a small AC signal in the motor to measure
> inductance)
> 
> The DM and EM series can also reduce the current going to the motor
> after it has been at zero speed for one second, to reduce heating.
> 
> The DM and EM series have an RS-232 port so the parameters
> (resistance, inductance and idle current reduction) can be set from
> software rather then auto-tuned.
> 
> In addition the EM series driver can detect skipped steps without an
> additional sensor and raise a fault line that (I assume)
> EMC/MachineKit can detect.
> 
> 


With my Leadshine DM drives I have set the P parameter to 1000, at
higher P values (6000 or so) the shaft vibrates and makes acute sounds




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[Emc-users] Any experience with Leadshine DM series stepper driver

[Chris Albertson]

Has anyone used the Leadshine digital stepper drivers?   Do they
really provide "smoother operation with less heat"?

I need to buy a stepper motor controller and notice that Leadshine
offers three series of drivers.  The most common cheap driver for a 4
amp motor is the M542.   But there is also the EM503 and DM556.  They
offer a EM, DM and M series of drivers.

The DM and EM series have a digital DSP controller and they claim a
mode where the driver tests the connected motor for both DC resistance
and inductance and then adjusts the current/speed parameters to suit.
The motor shaft vibrates while the test is underway (likely the
controller is placing a small AC signal in the motor to measure
inductance)

The DM and EM series can also reduce the current going to the motor
after it has been at zero speed for one second, to reduce heating.

The DM and EM series have an RS-232 port so the parameters
(resistance, inductance and idle current reduction) can be set from
software rather then auto-tuned.

In addition the EM series driver can detect skipped steps without an
additional sensor and raise a fault line that (I assume)
EMC/MachineKit can detect.


-- 

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Redondo Beach, California

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Re: [Emc-users] L wheezy in EFI dual boot with w10

[Andreas Pettersson]

You would need to look into customizing the boot loader. Arch linux
documentation has good Docs on this.

Den 22 maj 2017 6:53 em skrev "Ricardo Moscoloni" :

> Hi folks, maybe a dumb question but!:
> anyone knows how to start LCNC wheezy installation disk in efi mode to
> stand side by side with w10 on a gpt disk?
> (W10 already installed)
>
> Regards
> rck
> 
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[Emc-users] L wheezy in EFI dual boot with w10

[Ricardo Moscoloni]

Hi folks, maybe a dumb question but!:
anyone knows how to start LCNC wheezy installation disk in efi mode to
stand side by side with w10 on a gpt disk?
(W10 already installed)

Regards
rck
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Re: [Emc-users] disty game to fight .... warming ....

[giorgio foga]

I undertand Thanks.

Giorgio








https://en.wikipedia.org/wiki/Blue_Whale_(game)

Blue Whale (game) - Wikipedia
en.wikipedia.org
The term Blue Whale game (Russian: Синий кит, Siniy kit) refers to a trend on 
Russian-speaking social media, linked to a possible increase in child and ...





Da: Erik Christiansen 
Inviato: lunedì 22 maggio 2017 12.20
A: emc-users@lists.sourceforge.net
Oggetto: Re: [Emc-users] disty game to fight  warming 

On 22.05.17 19:40, Pavel G. Kasyanenko wrote:
> On 22.05.2017 18:48, giorgio foga wrote:
> > In Russia 157 suicides documented in 2 years.
>
> Please proof.

And on another mailing list too, please.

Erik

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Re: [Emc-users] disty game to fight .... warming ....

[Erik Christiansen]

On 22.05.17 19:40, Pavel G. Kasyanenko wrote:
> On 22.05.2017 18:48, giorgio foga wrote:
> > In Russia 157 suicides documented in 2 years.
> 
> Please proof.

And on another mailing list too, please.

Erik

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Re: [Emc-users] disty game to fight .... warming ....

[giorgio foga]

https://en.wikipedia.org/wiki/Blue_Whale_(game)

Blue Whale (game) - Wikipedia
en.wikipedia.org
The term Blue Whale game (Russian: Синий кит, Siniy kit) refers to a trend on 
Russian-speaking social media, linked to a possible increase in child and ...



I do not want to offend anyone is clear.
I am Italian and here also I agree with the Russians.
I heard the news yesterday and the Italian police agree.
On Russian numbers I can not say anything  but you can give better news. If 
you know it's a lie please calm me.

Thanks a lot Pavel Kasyanenko expecially if you can give me more extensive and 
better documented news.

regards
giorgio





Da: Pavel G. Kasyanenko 
Inviato: lunedì 22 maggio 2017 11.40
A: Enhanced Machine Controller (EMC)
Oggetto: Re: [Emc-users] disty game to fight  warming 

On 22.05.2017 18:48, giorgio foga wrote:
> In Russia 157 suicides documented in 2 years.

Please proof.


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related ...


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Re: [Emc-users] disty game to fight .... warming ....

[Pavel G. Kasyanenko]

On 22.05.2017 18:48, giorgio foga wrote:
> In Russia 157 suicides documented in 2 years.

Please proof.


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[Emc-users] disty game to fight .... warming ....

[giorgio foga]

I'm not the type of person to do these type of mail ... but I was impressed 
when I knew, especially for the possible developments of
this kind of thing (I think of the possible trade of a gaming platform or worse 
than that).
I do not know if I'm late to tell this to the users. But it does not matter. I 
mean.

I knew there was a game on the social network called Blue Whale ... but I guess 
it will soon change its name ...
which drives little boys from 9 to 17 ... naive ... to suicide.
This gic is perverse, play with the fragile psychology of boys who hide in 
playing with their parents.
Use their smartphones ...
In Italy a case was found in January ... but another 4 suicide attempts 
reported this week.

In Russia 157 suicides documented in 2 years.

Now the game has made victims in England and France from what I understand.

It is also turning in brazil ...

It is a fact that in agile nations among the youngest fashioners it becomes a 
petty craze as a transgression 
these small cuts in the game are proof of loyalty to the game itself.

I think we all could do something for that.
Starting with more control of our children and grandchildren. Especially those 
who are very experienced in programming.

I hope I have been able to express myself in a comprehensible manner and have 
been alerted in a useful way.


Giorgio

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