Re: [Emc-users] Engrave.py cuts deeper and deeper

[Sven Wesley]

I replaced the servo/encoder yesterday night and the result is the same. So
what do i have left to try? I'll test if the tuning software creates the
same behaviour (different computer, different OS...) and I'll try Toms
suggestion to add a filtering capacitor on the step signal.
I also found an old spec sheet for the servo's. I'm surprised it says that
the servo's are really good for plotters. To me plotter motors are small and
these are compact but not _that_ small. I have the J03M-series motors, rated
at 65 V and 10 A according to the label on the servo. The specification says
54.2 oz-in rated torque and 266 peak (0.4 resp 1.9 Nm). Could it be that
they are too small? I think that's not the case and even if I run my test
with low speeds around 200 mm/min the offset appears.
http://www.yaskawa.com/site/DMServo.nsf/(DocID)/TKUR-5ELJ3U/$File/TSE-C249-13B.pdf

I'm running out of options soon... :(


2009/9/26 Sven Wesley 

>
>
> 2009/9/26 Sven Wesley 
>
>>
>> I've tried all kinds of setups with the step timing, but I'll try to
>> increase the Direction time to see if it changes.
>> The only thing I really haven't tested is another encoder/servo, I'll try
>> that like I wrote earlier. And see if the tuning app makes the same error.
>>
>> I got an answer from Tom at Rutex USA and he says that 2us would be fine
>> for the step time. I might change drivers to see if there's a difference.
>>
>>
>> --S
>>
>>
> Forgot to write, Tom mentioned that he had seen noise on the step signal
> interpreted as a new step and it could be solved with a small capacitor
> between the step input and ground.
> I run the test software on an old laptop with a parallel port, that's also
> a reason to see if the error appears when tuning. Then the servo's are
> really pushed hard so the offset should be seen.
>
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Re: [Emc-users] Engrave.py cuts deeper and deeper

[Gene Heskett]

On Monday 28 September 2009, Sven Wesley wrote:
>I replaced the servo/encoder yesterday night and the result is the same. So
>what do i have left to try? I'll test if the tuning software creates the
>same behaviour (different computer, different OS...) and I'll try Toms
>suggestion to add a filtering capacitor on the step signal.
>I also found an old spec sheet for the servo's. I'm surprised it says that
>the servo's are really good for plotters. To me plotter motors are small
> and these are compact but not _that_ small. I have the J03M-series motors,
> rated at 65 V and 10 A according to the label on the servo. The
> specification says 54.2 oz-in rated torque and 266 peak (0.4 resp 1.9 Nm).
> Could it be that they are too small? I think that's not the case and even
> if I run my test with low speeds around 200 mm/min the offset appears.
>http://www.yaskawa.com/site/DMServo.nsf/(DocID)/TKUR-5ELJ3U/$File/TSE-C249-
>13B.pdf
>
>I'm running out of options soon... :(
>
My instant reaction is that they are very inefficient. I would call that size 
about a nema 17, which would be about right for a plotter, but without lots 
of geardown, would be a bit small for a milling machine even as small as my 
HF micromill.  If your driver is actually hitting them with 65 volts and 10 
amps per winding, that is 1300 watts, and a motor of that size cannot survive 
that sort of power for very long.  Since they have, I doubt the driver is 
actually hitting it that hard.

Normally for smaller stuff, we use a nema 23 motor, and the ones xylotek 
sells are either triple or quadruple stack lengths.  The triple stack can do 
262 oz/in, the quadruple stack length does 425 at their rated currents.  The 
xylotex driver is limited to 2.5 amps, so they are getting about 3/4 of their 
rated.  My rebuilt z can put 155 lbs of downforce when that 425 starts 
cogging & slipping. and can under ideal conditions do something on the north 
side of 30 ipm non cutting.

This is with a 28 volt supply.  A 65 volt supply would about double the 
speeds, but the xylotex has an absolute max of 30 volts.

The triple stacks on the x/y can break a 1/4" solid carbide mill if the 
spindle motor blows a fuse, and have several times.

I think I'd investigate a larger, 23 sized motor, at least for the z.

[...]

-- 
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 soap, ballot, jury, and ammo. Please use in that order."
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Re: [Emc-users] Engrave.py cuts deeper and deeper

[Sven Wesley]

2009/9/28 Gene Heskett 
>
> My instant reaction is that they are very inefficient. I would call that
> size
> about a nema 17, which would be about right for a plotter, but without lots
> of geardown, would be a bit small for a milling machine even as small as my
> HF micromill.  ... ...
>

I just ran the Rutex tuning software and the same error occurs, I also found
out it happens on X and Y as well but not as noticable. After reading your
reply Gene, I checked what others have for servo sizes and I believe I was
not only a little bit fooled when I bought these as the seller said they
were good enough for the application. Well, I thought they were compact...
:(

What is strange though is that tuning software seems to call back exactly
the amount of steps it should go and the starting position moves anyway.
When I ran my test gcode the last time with EMC2 I limited the speed to 200
mm/min and it still gave the error.

Is it possible that this really annoying problem be too small motors?
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Re: [Emc-users] Engrave.py cuts deeper and deeper

[Andy Pugh]

2009/9/28 Sven Wesley :

>  The specification says
> 54.2 oz-in rated torque and 266 peak (0.4 resp 1.9 Nm). Could it be that
> they are too small?

Possibly, I had 2.5Nm steppers on my mini-mill and upgraded to 4Nm
(though stepper and servo torque requirements are not exactly
equivalent)

Do the Rutex cards have any error outputs? (eg do they indicate a
following error in any way?). I think it is still unclear if the
drives are not doing what they are told, or are being told to do the
wrong thing.

-- 
atp

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[Emc-users] 4th axis tool path display

[Ian W. Wright]

 OK let me try this again(;-) . Does emc2 
generate a 4th axis(A)  toolpath
display. I am playing with the CD version and am generating 
Gcode for the A
axis but I don't see the toolpath displaying the A axis 
rotation. I t only
seems to show XYZ toolpaths.

Yes, the latest version of EMC2 will show rotary axes - not 
perfectly as the tool moves rather than the axis, but good 
enough. What you need to do is to include in the [DISPLAY] 
section of your machine's .ini file, a line which says 
GEOMETRY = AXYZ - assuming you are using the conventional 
4th axis as 'A'.

Ian
_
Ian W. Wright
Sheffield  UK

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Re: [Emc-users] Engrave.py cuts deeper and deeper

[Andy Pugh]

2009/9/28 Sven Wesley :

> Is it possible that this really annoying problem be too small motors?

It shouldn't be with an encoder-equipped system, as any deviation from
commanded position should trigger a follow error.
However, perhaps such an error is being raised by the drive but not
seen my EMC2 or yourself?

Try the tuning software with the servo disconnected from the machine,
with just a pointer on the shaft to see if it is "slipping"?

-- 
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Re: [Emc-users] Engrave.py cuts deeper and deeper

[Sven Wesley]

2009/9/28 Andy Pugh 
...

> It shouldn't be with an encoder-equipped system, as any deviation from
> commanded position should trigger a follow error.
> However, perhaps such an error is being raised by the drive but not
> seen my EMC2 or yourself?
>
> Try the tuning software with the servo disconnected from the machine,
> with just a pointer on the shaft to see if it is "slipping"?
>


I did as you suggested (I'm in the workshop right now) and you are right!
They overshoot with no load at all.

Is here anyone in Sweden that could borrow me another step/dir servo driver
to test with?
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Re: [Emc-users] Engrave.py cuts deeper and deeper

[Rob Jansen]

Well,

the figures do not compute, the spec tells me it's 18.2V 11A which would 
be max. 200 W.
But I thing 0.4 Nm is very low for this wattage.

As the spec also tells me it is meant for applications such as carriage 
of high speed printers and XY plotters.
IMHO these are too small for a CNC router with anything bigger than the 
smallest dremel or proxxon drill.

The Rutex card do not have any error outputs (none that I could find).
My best guess is that the motors are not able to do what they are told to.

Regards,

Rob

Andy Pugh wrote:
> 2009/9/28 Sven Wesley :
>
>   
>>  The specification says
>> 54.2 oz-in rated torque and 266 peak (0.4 resp 1.9 Nm). Could it be that
>> they are too small?
>> 
>
> Possibly, I had 2.5Nm steppers on my mini-mill and upgraded to 4Nm
> (though stepper and servo torque requirements are not exactly
> equivalent)
>
> Do the Rutex cards have any error outputs? (eg do they indicate a
> following error in any way?). I think it is still unclear if the
> drives are not doing what they are told, or are being told to do the
> wrong thing.
>
>   

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Re: [Emc-users] 4th axis tool path display

[Dave]

While on the subject of tool path display.
By any chance can that [DISPLAY] line or any other line in the INI file 
cause the Axis lathe display to show the tool bit on top of the Z axis 
rather than below it.

I have a slant back lathe with basically a rear tool post and the 
standard display is a bit confusing as it is.

Thanks,
Dave 


Ian W. Wright wrote:
>  OK let me try this again(;-) . Does emc2 
> generate a 4th axis(A)  toolpath
> display. I am playing with the CD version and am generating 
> Gcode for the A
> axis but I don't see the toolpath displaying the A axis 
> rotation. I t only
> seems to show XYZ toolpaths.
>
> Yes, the latest version of EMC2 will show rotary axes - not 
> perfectly as the tool moves rather than the axis, but good 
> enough. What you need to do is to include in the [DISPLAY] 
> section of your machine's .ini file, a line which says 
> GEOMETRY = AXYZ - assuming you are using the conventional 
> 4th axis as 'A'.
>
> Ian
> _
> Ian W. Wright
> Sheffield  UK
>
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>   


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Re: [Emc-users] Engrave.py cuts deeper and deeper

[Andy Pugh]

2009/9/28 Sven Wesley :

> I did as you suggested (I'm in the workshop right now) and you are right!
> They overshoot with no load at all.

So, the good news is that they are probably big enough for the job, as
they behave similarly under load and no-load, and have successfully
routed wood already.

The bad news is that we still have no idea what is wrong:
It seems unlikely that both EMC and the tuning software would both
produce incorrect pulse trains.
All that seems to leave is corruption of the pulse-train between the
computer and the drive, or that the drive is not making a good job of
driving the servos.

If you are in a hurry to have a working system:
http://cgi.ebay.co.uk/3-AXIS-CNC-Router-or-Mill-Stepper-Motor-complete-kit_W0QQitemZ280401285543QQcmdZViewItemQQptZUK_BOI_Electrical_Components_Supplies_ET?hash=item41493811a7&_trksid=p3286.c0.m14#ht_1062wt_1172

Your servo system is better in principle, but perhaps you would be
better getting a working system then fiddling with the servos when you
don't need them?

-- 
atp

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[Emc-users] New Optical Interface Being Developed

[Matt Shaver]

Whether this will mean anything for folks like us who need a high speed,
_low latency_ I/O connection will depend upon the details of the
controller:

http://www.roughlydrafted.com/2009/09/26/report-apple-pushed-intel-to-develop-light-peak-cabling/

So far, I haven't seen any in depth technical descriptions, so this only
qualifies as a "keeping an eye on the future" kind of thing for now.

Thanks,
Matt



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Re: [Emc-users] Engrave.py cuts deeper and deeper

[Gene Heskett]

On Monday 28 September 2009, Sven Wesley wrote:
>2009/9/28 Gene Heskett 
>
>> My instant reaction is that they are very inefficient. I would call that
>> size
>> about a nema 17, which would be about right for a plotter, but without
>> lots of geardown, would be a bit small for a milling machine even as
>> small as my HF micromill.  ... ...
>
>I just ran the Rutex tuning software and the same error occurs, I also
> found out it happens on X and Y as well but not as noticable. After
> reading your reply Gene, I checked what others have for servo sizes and I
> believe I was not only a little bit fooled when I bought these as the
> seller said they were good enough for the application. Well, I thought
> they were compact...
>
>:(
>
>What is strange though is that tuning software seems to call back exactly
>the amount of steps it should go and the starting position moves anyway.
>When I ran my test gcode the last time with EMC2 I limited the speed to 200
>mm/min and it still gave the error.
>
>Is it possible that this really annoying problem be too small motors?

Only a substitution test will answer that.  I think I would magic marker the 
motor shaft, and try it at 100mm, then 50mm, and see if it is bad, or much 
reduced at the slower speeds.  I would also consider reducing the MAX_ACCEL 
settings, I found I could go faster in the middle of a  move if I slowed the 
accels.  The end result on a complex job was about the same, but the curve 
following on my video cards display was much better.

Setting the feed override slider to 5% might be enlightening too.  Steppers 
per sei lose torque as the speeds go up and the only way to stop that is to 
raise the voltage so that the winding inductance is overcome faster.  The 
motors generally won't care since the current is regulated and its not 
uncommon to see a 2.2 volt motor getting 190 volts for a few microseconds if 
the drivers have that much available.  Much bigger machinery of course than I 
have.  Those drivers cost REAL money too, where I define real money as over 
$200/axis.

-- 
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"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
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The NRA is offering FREE Associate memberships to anyone who wants them.


When the only tool you have is a hammer, every problem starts to look
like a nail.

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Re: [Emc-users] Engrave.py cuts deeper and deeper

[Gene Heskett]

On Monday 28 September 2009, Andy Pugh wrote:
>2009/9/28 Sven Wesley :
>> I did as you suggested (I'm in the workshop right now) and you are right!
>> They overshoot with no load at all.
>
>So, the good news is that they are probably big enough for the job, as
>they behave similarly under load and no-load, and have successfully
>routed wood already.
>
>The bad news is that we still have no idea what is wrong:
>It seems unlikely that both EMC and the tuning software would both
>produce incorrect pulse trains.
>All that seems to leave is corruption of the pulse-train between the
>computer and the drive, or that the drive is not making a good job of
>driving the servos.
>
>If you are in a hurry to have a working system:
>http://cgi.ebay.co.uk/3-AXIS-CNC-Router-or-Mill-Stepper-Motor-complete-kit_
>W0QQitemZ280401285543QQcmdZViewItemQQptZUK_BOI_Electrical_Components_Suppli
>es_ET?hash=item41493811a7&_trksid=p3286.c0.m14#ht_1062wt_1172
>
This one is similar to the xylotex kit, and looks to be more ready  to go, at 
a competitive price.

>Your servo system is better in principle, but perhaps you would be
>better getting a working system then fiddling with the servos when you
>don't need them?

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
The NRA is offering FREE Associate memberships to anyone who wants them.


50% of the manual is in .pdf readme files

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[Emc-users] Error in debounce documentation

[Eric H. Johnson]

HI all,

This was from Andy's inquiry of a couple days ago. It appears that the
documentation for the debounce component in the "Integrator Manual" (Page
94) has a slight error or typo. The syntax as written does not work for me,
i.e.:
halcmd loadrt debounce "1 4 2"
but
halcmd loadrt debounce "1,4,2"
does.

It seems comma separators between values are required, at least when done
from a hal file. If the commas are omitted, only the first group is created.

Regards,
Eric



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Re: [Emc-users] Engrave.py cuts deeper and deeper

[Sven Wesley]

2009/9/28 Gene Heskett 

> On Monday 28 September 2009, Andy Pugh wrote:
> >2009/9/28 Sven Wesley :
> >> I did as you suggested (I'm in the workshop right now) and you are
> right!
> >> They overshoot with no load at all.
> >
> >So, the good news is that they are probably big enough for the job, as
> >they behave similarly under load and no-load, and have successfully
> >routed wood already.
> >
> >The bad news is that we still have no idea what is wrong:
> >It seems unlikely that both EMC and the tuning software would both
> >produce incorrect pulse trains.
> >All that seems to leave is corruption of the pulse-train between the
> >computer and the drive, or that the drive is not making a good job of
> >driving the servos.
> >
> >If you are in a hurry to have a working system:
> >
> http://cgi.ebay.co.uk/3-AXIS-CNC-Router-or-Mill-Stepper-Motor-complete-kit_
>
> >W0QQitemZ280401285543QQcmdZViewItemQQptZUK_BOI_Electrical_Components_Suppli
> >es_ET?hash=item41493811a7&_trksid=p3286.c0.m14#ht_1062wt_1172
> >
> This one is similar to the xylotex kit, and looks to be more ready  to go,
> at
> a competitive price.
>
> >Your servo system is better in principle, but perhaps you would be
> >better getting a working system then fiddling with the servos when you
> >don't need them?
>
> --
> Cheers, Gene
>

I can cannot see any changes in speed even if I push put all my body weight
on the Z-axis, it just runs super easy and the motors never gets warm. It
doesn't _seem_ to be a force/power problem.
I have put so much money and time in building a servo system. It's REALLY
annoying if I have to go back to steppers. To me, these eBay-items looks
pretty small too. Are they really going to make it?
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Re: [Emc-users] Engrave.py cuts deeper and deeper

[Andy Pugh]

2009/9/28 Sven Wesley :

>  To me, these eBay-items looks
> pretty small too. Are they really going to make it?

Good question, they are rated 50% more torque than your servos. Your
servos are a much higher-quality solution, if only they worked.

I was suggesting a possible way to get yourself up and running, while
you work on the servos "offline".

-- 
atp

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Re: [Emc-users] Engrave.py cuts deeper and deeper

[Sven Wesley]

2009/9/28 Andy Pugh 

> 2009/9/28 Sven Wesley :
>
> >  To me, these eBay-items looks
> > pretty small too. Are they really going to make it?
>
> Good question, they are rated 50% more torque than your servos. Your
> servos are a much higher-quality solution, if only they worked.
>
> I was suggesting a possible way to get yourself up and running, while
> you work on the servos "offline".
>
> --
> atp
>
>
Don't misunderstand me, I really need this machine running and appreciate
all the help I can get. I've been looking at Keling products to get
everything running as fast as possible, they have pretty good steppers and
drivers I believe (and Gecko's too) that can take the voltage my power
supply outputs. I need the speed and I rather put some extra money on
speeding the machine up.
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Re: [Emc-users] UK EMC Users Meetup

[Andy I]

Rob,
I'd be interested. I am planning to go to the Exhibition probably on the
Saturday.
Regards
Andy

-Original Message-
From: robert [mailto:rob...@innovative-rc.com] 
Sent: 22 September 2009 20:44
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] UK EMC Users Meetup

Hi all

I Spoke with Archivist earlier today on IRC and we talked about having a

UK meet, we thought about having a social meet and greet.

we have the Midlands Model Engineering Exhibition coming up on the 16th 
to 20th October which could serve as a good place to meet.
website info here
http://www.meridienneexhibitions.co.uk/our-events-detail.php?id=
07

if any body is interested please reply here or get in touch with my self

on irc user name (robh or robh_)


if any body things of better place or idea then we are open to ideas

if this works out then we can progress to something abit more serious 
for next year on a meet up


Thanks, Rob


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Re: [Emc-users] Engrave.py cuts deeper and deeper

[Gene Heskett]

On Monday 28 September 2009, Sven Wesley wrote:
>2009/9/28 Gene Heskett 
>
>> On Monday 28 September 2009, Andy Pugh wrote:
>> >2009/9/28 Sven Wesley :
>> >> I did as you suggested (I'm in the workshop right now) and you are
>>
>> right!
>>
>> >> They overshoot with no load at all.
>> >
>> >So, the good news is that they are probably big enough for the job, as
>> >they behave similarly under load and no-load, and have successfully
>> >routed wood already.
>> >
>> >The bad news is that we still have no idea what is wrong:
>> >It seems unlikely that both EMC and the tuning software would both
>> >produce incorrect pulse trains.
>> >All that seems to leave is corruption of the pulse-train between the
>> >computer and the drive, or that the drive is not making a good job of
>> >driving the servos.
>> >
>> >If you are in a hurry to have a working system:
>>
>> http://cgi.ebay.co.uk/3-AXIS-CNC-Router-or-Mill-Stepper-Motor-complete-ki
>>t_
>>
>> >W0QQitemZ280401285543QQcmdZViewItemQQptZUK_BOI_Electrical_Components_Sup
>> >pli es_ET?hash=item41493811a7&_trksid=p3286.c0.m14#ht_1062wt_1172
>>
>> This one is similar to the xylotex kit, and looks to be more ready  to
>> go, at
>> a competitive price.
>>
>> >Your servo system is better in principle, but perhaps you would be
>> >better getting a working system then fiddling with the servos when you
>> >don't need them?
>>
>> --
>> Cheers, Gene
>
>I can cannot see any changes in speed even if I push put all my body weight
>on the Z-axis, it just runs super easy and the motors never gets warm. It
>doesn't _seem_ to be a force/power problem.

In both directions?

Another thing is I'm having a hard time visualizing your setup, a few pix 
might help clarify what it is that I undertook to pontificate on.

The emc sign on logo is runnable, and can be used just to exercise the 
machine.  If you start it after 'homeing' all 3 axis's, but home z on a block 
an inch high, and run it once with the feed override at 100%, then check the 
clearance at the end, record that, then run it back to the start position & 
rehome it on that same 1" tall block, then set the feed override to 10%, and 
run it again.  If you wind up with the same error at the end that you got the 
first time, then its time to break out the oscilloscope and find the problem, 
possibly at the output of the parport.

The point is that we will then have absolved the motors themselves, and its 
time to find out if the drive signals are correct.

I admittedly tend to treat the scope like a pair of pliers, one tends to do 
that when one has had a probe in one hand for 58 of my soon to be 75 years.

If you can locate one, and its good enough to look at this digital stuff, it 
can be very educational.  Slower, non-triggered sweep models need not bother 
knocking, something like this needs dual trace, triggered, dc to 50 or more 
megahertz response, anything slower will lie to you.  Oh, and properly 
compensated 10x probes too.

>I have put so much money and time in building a servo system. It's REALLY
>annoying if I have to go back to steppers. To me, these eBay-items looks
>pretty small too. Are they really going to make it?

If that z axis can pick up both itself and you, then I'd have to say they are 
big enough.  But lets do the above comparison anyway.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
The NRA is offering FREE Associate memberships to anyone who wants them.


Publishing a volume of verse is like dropping a rose petal down the
Grand Canyon and waiting for the echo.

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Re: [Emc-users] Engrave.py cuts deeper and deeper

[Jon Elson]

Sven Wesley wrote:
> I can cannot see any changes in speed even if I push put all my body weight
> on the Z-axis, it just runs super easy and the motors never gets warm. It
> doesn't _seem_ to be a force/power problem.
> I have put so much money and time in building a servo system. It's REALLY
> annoying if I have to go back to steppers. To me, these eBay-items looks
> pretty small too. Are they really going to make it?
>   
I am now CONVINCED that your problem is a step timing issue, possibly a 
step-vs-direction
setup time issue.  I am also sure the Rutex has some kind of a fault 
output, but you may not be using it.
I remember the fault window is programmable, as opposed to Gecko's fixed 
limit.

If you were to put stepper motors and a stepper drive on the machine, 
you might well have
the exact same problem - many people have.  The timing of the 
step/direction pulses MUST
meet what the manufacturer needs.  If the manufacturer's specs are 
non-existant or just wrong,
that makes fixing this much harder.

The basic problem is either the drive fails to detect some of the step 
pulses, often just after a direction change,
or counts a step pulse in the wrong direction.  Gecko once had a problem 
with the pulse multiplier in their
Gecko 210 (stepper) and 340 (servo) where if the direction changed while 
the multiplier was still putting out
multiplied pulses, those steps would go in the wrong direction.  It led 
to errors in fractions of the commanded
steps.  The fix was to either remove the pulse multiplier or make sure 
the software didn't generate a step pulse
for some specific time after a direction change.  That's just one 
possible way such a problem could happen.

Unless somebody knows the specific settings for your drives, you may 
need to systematically explore the
range of settings and motion to see if you can identify which adjustment 
affects the problem.  And, if you find a setting that
makes it WORSE, that may be an important clue to what the underlying 
problem is.

You can make a chain of short moves in the same direction, with a pause 
between each move, and see if there
is no error.  Then, make moves back and forth, with delay between each 
move - again, check for error.
Then, move back and forth with NO delay between moves.  Does this make 
the error worse?  If you see it is
worse with back and forth moves with no delay than either of the other 
movements, that is a BIG clue it
has something to do with step timing vs the direction signal.

Jon

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[Emc-users] srm?

[a]

hi
will srm myfile.txt delete file?

i have this file, and directory is right.

a...@aram-desktop:~$ srm /home/aram/Desktop/TR2~
Error: File /home/aram/Desktop/TR2~ - No such file or directory
a...@aram-desktop:~$

how i can use srm command?

thanks
aram






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Re: [Emc-users] Engrave.py cuts deeper and deeper

[cogoman]

I am catching up on my EMAIL, and I've still got 10 EMC digests to read, but I 
wanted to comment on the quote below.  This gives the impression that you are 
setting the PID values for the servo motor on the bench with nothing attached.  
This is not a good idea since these settings SHOULD be sluggish in the system.

  Remember FORCE = MASS times ACCELERATION.

If you are looking for a certain angular acceleration, on the bench you will 
have very little mass, and so will need very little force.  Once you put the 
motor in the system, the mass will be over 100 times the mass on the bench, and 
require over 100 times the force.  In a like manner, if you've tuned the PID 
values for the machine you'll be driving, don't run it dry on the bench, it 
should whip the motor around like a toy, and could break into a motor trashing 
oscillation. The PID values must be set for the axis you will be driving.  If 
the two axes have drastically different MASSes, then PID values that are 
optimum for one axis, may cause a system clobbering oscillation when switched 
to another lighter axis.  My limited experience with a FADAL mill had drive 
cards (with their PID values set) swappable between axes without any problems, 
but it is best to err on the side of caution.

| This is s frustrating! When setting the PID the servo's accelerates so
| fast I have to clamp the to the bench. When running with the rest of the
| system it's just poor performance.


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Re: [Emc-users] srm?

[Kirk Wallace]

On Mon, 2009-09-28 at 22:18 -0600, a...@conceptmachinery.com wrote:
> hi
> will srm myfile.txt delete file?
> 
> i have this file, and directory is right.
> 
> a...@aram-desktop:~$ srm /home/aram/Desktop/TR2~
> Error: File /home/aram/Desktop/TR2~ - No such file or directory
> a...@aram-desktop:~$
> 
> how i can use srm command?
> 
> thanks
> aram

My guess is, the ~ my not be a valid character on the command line,
since the command line may interpret it to mean "home directory". For
instance, if my home directory is /home/kwallace, I could use "rm
~/myfile.txt" the same as "rm /home/kwallace/myfile.txt".
-- 
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
http://www.wallacecompany.com/E45/index.html
California, USA


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Re: [Emc-users] srm?

[a]

I try with ~ and without and still No such directory
I used rm  and still No such directory
I just type this into Terminals. Is this way to do that?
thanks
aram


> On Mon, 2009-09-28 at 22:18 -0600, a...@conceptmachinery.com wrote:
>> hi
>> will srm myfile.txt delete file?
>>
>> i have this file, and directory is right.
>>
>> a...@aram-desktop:~$ srm /home/aram/Desktop/TR2~
>> Error: File /home/aram/Desktop/TR2~ - No such file or directory
>> a...@aram-desktop:~$
>>
>> how i can use srm command?
>>
>> thanks
>> aram
>
> My guess is, the ~ my not be a valid character on the command line,
> since the command line may interpret it to mean "home directory". For
> instance, if my home directory is /home/kwallace, I could use "rm
> ~/myfile.txt" the same as "rm /home/kwallace/myfile.txt".
> --
> Kirk Wallace
> http://www.wallacecompany.com/machine_shop/
> http://www.wallacecompany.com/E45/index.html
> California, USA
>
>
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> ahead of the curve. Join us from November 9-12, 2009. Register
> now!
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Re: [Emc-users] srm?

[Rob Jansen]

Hm,

I don't have access to my EMC system right now, but the webserve also 
runs Ubuntu, it does accept the ~ on the commandline -
as you can also see from the error in Aram's mail (Error: file TR2~ - No 
such ...).

Maybe there are unprintable characters in the filename?
You could try name completion by typing the tab key, E.g: srm 
/home/aram/Desktop/T 

Or just use the file manager to remove the file - that shoul work also.

Rob

a...@conceptmachinery.com wrote:
> I try with ~ and without and still No such directory
> I used rm  and still No such directory
> I just type this into Terminals. Is this way to do that?
> thanks
> aram
>
>
>   
>> On Mon, 2009-09-28 at 22:18 -0600, a...@conceptmachinery.com wrote:
>> 
>>> hi
>>> will srm myfile.txt delete file?
>>>
>>> i have this file, and directory is right.
>>>
>>> a...@aram-desktop:~$ srm /home/aram/Desktop/TR2~
>>> Error: File /home/aram/Desktop/TR2~ - No such file or directory
>>> a...@aram-desktop:~$
>>>
>>> how i can use srm command?
>>>
>>> thanks
>>> aram
>>>   
>> My guess is, the ~ my not be a valid character on the command line,
>> since the command line may interpret it to mean "home directory". For
>> instance, if my home directory is /home/kwallace, I could use "rm
>> ~/myfile.txt" the same as "rm /home/kwallace/myfile.txt".
>> --
>> Kirk Wallace
>> http://www.wallacecompany.com/machine_shop/
>> http://www.wallacecompany.com/E45/index.html
>> California, USA
>>
>>
>> --
>> Come build with us! The BlackBerry® Developer Conference in SF, CA
>> is the only developer event you need to attend this year. Jumpstart your
>> developing skills, take BlackBerry mobile applications to market and stay
>> ahead of the curve. Join us from November 9-12, 2009. Register
>> now!
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>>
>> 
>
>
>
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>   

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