Re: [Emc-users] Beginner question

[Mark Cason]

   I know that this is too late, but I recently bought some Mobil Vactra 
#2 for about $20.00, along with a few other things from Enco.  Their 
site is down ATM, but its:
http://www.use-enco.com

   Lately, they have been offering free shipping in the US, on orders 
over $25.00.  I have the code if anybody's interested.



Ne M'oubliez   ---Family Motto
Hope for the best, plan for the worst   ---Personal Motto
Veni, vidi, vici   ---Julius Caesar

On 07/08/2009 08:15 PM, Gene Heskett wrote:
> On Wednesday 08 July 2009, Andy Pugh wrote:
>> 2009/7/8 Gene Heskett:
>>>   I didn't expect a 10 dollar shipping rip off though.  That
>>> brings it up to about $36.  Reminds me of ebay.
>> Too late now, but did you check eBay? There are folk on there
>> reselling small quantities.
>
> No I didn't Andy, but I've not seen an ebay sale with less than a 20 ship and
> handle for ages, so a tenner for around 10 pounds could be worse.
>

--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo tuning

[Peter C. Wallace]

On Wed, 8 Jul 2009, Jon Elson wrote:

> Date: Wed, 08 Jul 2009 21:22:22 -0500
> From: Jon Elson 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: Re: [Emc-users] Servo tuning
> 
> Leslie Newell wrote:
>> Hi Jon,
>>
>> If I set the I term any lower than 500 it takes a LONG time to have any
>> effect at all. Even with 500 it is taking several seconds to stabilise.
>>
>>
> I'm beginning to suspect there has been a change in the way PID works,
> either due to hostmot2 or
> the version of EMC you and I are using.  Do you use the normal PID
> component (loadrt pid num_chan=4)?
> Or, does hostmot2 use some different PID package?   (I've been looking
> into doing velocity estimates with a hardware+driver change, and it
> would require a different PID, as it needs to get velocity from the
> driver as opposed to calculating it by position delta each cycle).


The HostMot2 HAL file just uses the standard PID component, which is 
what makes the I term error so mysterious...

>
> Jon
>
> --
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>

Peter Wallace
Mesa Electronics

(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.


--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo tuning

[Jon Elson]

Leslie Newell wrote:
> Hi Jon,
>
> If I set the I term any lower than 500 it takes a LONG time to have any 
> effect at all. Even with 500 it is taking several seconds to stabilise.
>
>   
I'm beginning to suspect there has been a change in the way PID works, 
either due to hostmot2 or
the version of EMC you and I are using.  Do you use the normal PID 
component (loadrt pid num_chan=4)?
Or, does hostmot2 use some different PID package?   (I've been looking 
into doing velocity estimates with a hardware+driver change, and it 
would require a different PID, as it needs to get velocity from the 
driver as opposed to calculating it by position delta each cycle).

Jon

--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo tuning

[Peter C. Wallace]

On Thu, 9 Jul 2009, Leslie Newell wrote:

> Date: Thu, 09 Jul 2009 00:33:00 +0100
> From: Leslie Newell 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: Re: [Emc-users] Servo tuning
> 
> Hi Peter,
>
> My point is that the I term is introducing the error in the first place.
> As you can see from the second plot, without I the response is pretty good.
>
> I have been wondering if my problems  are hostmot2 related but I can't
> think of any way that they can be. The encoder appears to be reading
> correctly and the output is simply PWM - I can't see how that could
> affect the tuning in the way I am experiencing.
>
> Les

Yes its pretty strange, looked at your trace once again and I dont know how 
you get the slow error buildup when in motion. With an "I" term added before 
things were well tuned, I would still expect ierror to try to correct the 
existing error, maybe windup and overshoot at the end, but you dont have that 
problem. The PID component only has feedback and commanded position inputs 
coming from HostMot2 (I think thats all), and they obviously work for P and D, 
so how "I" can not work properly is fairly mysterious.

Peter Wallace
Mesa Electronics

(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.


--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Beginner question

[Gene Heskett]

On Wednesday 08 July 2009, Andy Pugh wrote:
>2009/7/8 Gene Heskett :
>>  I didn't expect a 10 dollar shipping rip off though.  That
>> brings it up to about $36.  Reminds me of ebay.
>
>Too late now, but did you check eBay? There are folk on there
>reselling small quantities.

No I didn't Andy, but I've not seen an ebay sale with less than a 20 ship and 
handle for ages, so a tenner for around 10 pounds could be worse.

-- 
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.


"sic transit discus mundi"
(From the System Administrator's Guide, by Lars Wirzenius)


--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo tuning

[Peter C. Wallace]

On Thu, 9 Jul 2009, Leslie Newell wrote:

> Date: Thu, 09 Jul 2009 00:33:00 +0100
> From: Leslie Newell 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: Re: [Emc-users] Servo tuning
> 
> Hi Peter,
>
> My point is that the I term is introducing the error in the first place.
> As you can see from the second plot, without I the response is pretty good.


Two gueses: 1. Your first accel error spike sets the integrated error to 
some large value, and the time constant is so slow you get a very slow 
recovery. Not sure why decel didnt drive the integral error the other way

Basically I wouldn't try to set "I" until you are doing motions that the 
hardware can follow, otherwise integral windup will bite you. Also your 
integral time constant looks too slow (but maybe its ok for such small error) 
When you get accel set to a reasonable value, you might try increasing I


>
> I have been wondering if my problems  are hostmot2 related but I can't
> think of any way that they can be. The encoder appears to be reading
> correctly and the output is simply PWM - I can't see how that could
> affect the tuning in the way I am experiencing.

HostMot2 is not related to PID other than feeding it position and velocity
and generating PWM. I'm pretty sure this is PID tuning issue\.


Peter Wallace
Mesa Electronics

(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.


--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo tuning

[Leslie Newell]

Hi Peter,

My point is that the I term is introducing the error in the first place. 
As you can see from the second plot, without I the response is pretty good.

I have been wondering if my problems  are hostmot2 related but I can't 
think of any way that they can be. The encoder appears to be reading 
correctly and the output is simply PWM - I can't see how that could 
affect the tuning in the way I am experiencing.

Les



> Actually it may be that the HostMot2 tuning parameters are different for some 
> reason. Once the P/D/FF1 are tuned, I would think a much larger value of I 
> should be used, as 500 seemed to take more than a second to pull in a many 
> count error (I'm guessing the counts from the steps in the second half of the 
> trace). I would think that the I term should fix that large of an error in a 
> small fraction of a second. Also if the I term is too high relative to P you 
> will get oscillation (P is damping relative to I)

--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo tuning

[Leslie Newell]

Hi Jon,

If I set the I term any lower than 500 it takes a LONG time to have any 
effect at all. Even with 500 it is taking several seconds to stabilise.

Les

> Reading the calibration dialog box to the right of Halscope, I see the 
> first pic has I at 500.  That is WAY too high.
> I don't know the exact dynamics of the I calculation, but I never set it 
> anywhere near that high.  I usually have it at a few % of P, max.
> I note that FF1 and FF2 are not zero, they can muddy the waters a lot.  
> The 2nd pic looks fairly good, although I don't know what speed these 
> moves were.  As for the accel spikes, FF2 is easy to overdo, and is very 
> sensitive, so a change from .002 to .0025 can make a big difference.


--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo tuning

[Leslie Newell]

Hi Peter,

The point at the end of the plot has a high following error because I 
hasn't finished correcting itself from the mess it made of the cruise 
phase. The second screen shot I posted 
 is exactly what you asked for - 
the same settings but with I set to zero.

Les

> The point at the end of movement seems not to be corrected by the P term
> Unless this is just integrator windup. Can you do the same plot with no 
> integral term?


--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo tuning

[Peter C. Wallace]

On Wed, 8 Jul 2009, Jon Elson wrote:

> Date: Wed, 08 Jul 2009 12:24:34 -0500
> From: Jon Elson 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: Re: [Emc-users] Servo tuning
> 
> Leslie Newell wrote:
>> I have just got the lathe on the internet so I uploaded a screen shot of
>> the I weirdness . It shows a long
>> move followed by the term returning the axis to position. The big spikes
>> are accel/decel. Here is a shot with the I term turned down to 0 but
>> everything else the same . I still
>> need to play around with the tuning to get rid of those acceleration
>> spikes. The accel is set very high at the moment for testing purposes.
>>
> Reading the calibration dialog box to the right of Halscope, I see the
> first pic has I at 500.  That is WAY too high.
> I don't know the exact dynamics of the I calculation, but I never set it
> anywhere near that high.  I usually have it at a few % of P, max.
> I note that FF1 and FF2 are not zero, they can muddy the waters a lot.
> The 2nd pic looks fairly good, although I don't know what speed these
> moves were.  As for the accel spikes, FF2 is easy to overdo, and is very
> sensitive, so a change from .002 to .0025 can make a big difference.
>
> Jon


Actually it may be that the HostMot2 tuning parameters are different for some 
reason. Once the P/D/FF1 are tuned, I would think a much larger value of I 
should be used, as 500 seemed to take more than a second to pull in a many 
count error (I'm guessing the counts from the steps in the second half of the 
trace). I would think that the I term should fix that large of an error in a 
small fraction of a second. Also if the I term is too high relative to P you 
will get oscillation (P is damping relative to I)



Peter Wallace
Mesa Electronics

(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.


--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] OpenGL on EMC2? + 7i43

[Richard Acosta]

Ok Rob, you're right, and i'm expressing badly.
Behind this great project, the non better attended part is user support.

I understand there is not such thing as a corporation, big business (or 
small) or any kind of organisation for profit.

Well, i think it could be a great idea, that some more time could be 
employed to document things, and update documentation, but for the same 
people making things. So mistakes could be avoided(or try).

I think that instead of buying 7i43 i would buy 5i20 i could be now with 
a working system, i'm aware of that.
(not sure about expressed my idea correctly here)


My bigger problem, and i have to confess here, is that people behind 
some projects, starts always blaming others. Here was the first time i 
had as an answer: "you did this wrong" or "you are not doing things 
right" but not getting the correct way to do it, just vague comments 
that i already knew. There comes my angry from, and i know not everyone 
has the same attitude.

Thanks for your time, with the project and this message.

Best regards.


> There is no "EMC" to tell you what is fully supported.
> Also there is no fully support.
>
> EMC is an open source project kept alive since 2001 (as far as I can 
> remember). These guys did a good job of maintaining EMC and supporting 
> people that join the mailing lists.
> Meanwhile I am becoming part of this community: I located some features 
> that were not working correctly (for my situation) and these are now 
> fixed, I helped out a few of the beginners with their configurations and 
> am helping out a number of local EMC users with their problems.
>
> Telling me that the support is the biggest weakness hurts. There are a 
> lot of persons on this list (including me) trying to help out where we 
> can. 95% of all the EMC users are happy with their setup, 4% (or more) 
> has problems that are fixed thanks to this mailing list and the 
> remaining (1% or less) of the users have problems that are not solved 
> due to different reasons.
>
> I (we) are sad to read that your problem is not solved and that you are 
> an unhappy EMC user.
> Please let us stop this endless quarrel about EMC support.
>
> Regards,
>
> Rob
>   


--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo tuning

[Jon Elson]

Leslie Newell wrote:
> I have just got the lathe on the internet so I uploaded a screen shot of 
> the I weirdness . It shows a long 
> move followed by the term returning the axis to position. The big spikes 
> are accel/decel. Here is a shot with the I term turned down to 0 but 
> everything else the same . I still 
> need to play around with the tuning to get rid of those acceleration 
> spikes. The accel is set very high at the moment for testing purposes.
>   
Reading the calibration dialog box to the right of Halscope, I see the 
first pic has I at 500.  That is WAY too high.
I don't know the exact dynamics of the I calculation, but I never set it 
anywhere near that high.  I usually have it at a few % of P, max.
I note that FF1 and FF2 are not zero, they can muddy the waters a lot.  
The 2nd pic looks fairly good, although I don't know what speed these 
moves were.  As for the accel spikes, FF2 is easy to overdo, and is very 
sensitive, so a change from .002 to .0025 can make a big difference.

Jon

--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Axis Plot Screen

[sam sokolik]

In  the display setting of the ini file you can use the GEOMETRY setting 
to make axis backplot correct for your machine.

http://www.linuxcnc.org/docs/2.3/html/config_ini_config.html#sub:%5BDISPLAY%5D-section

GEOMETRY = XYZABCUVW
Controls the preview and backplot of rotary motion. This item
consists of a sequence of axis letters, optionally preceded by a "-"
sign. Only axes defined in [TRAJ]AXES should be used. This sequence
specifies the order in which the effect of each axis is applied,
with a "-" inverting the sense of the rotation or translation.
The proper GEOMETRY string depends on the machine configuration and
the kinematics used to control it. The example string
GEOMETRY=XYZBCUVW is for a 5-axis machine where kinematics causes
UVW to move in the coordinate system of the tool and XYZ to move in
the coordinate system of the material. The order of the letters is
important, because it expresses the order in which the different
transformations are applied




Andy Pugh wrote:
> 2009/7/8 Jim Wilkin :
>
>   
>> Just got my a axis going and noticed that the Axis plot screen doesn't
>> show the A axis.
>> 
>
> I noticed the same thing, but decided it was probably deliberate, as I
> can't imagine how you would show the A axis movement without knowing
> the absolute position and direction of the centre of rotation of A
> relative to the other axes.
>
>   
--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Beginner question

[Andy Pugh]

2009/7/8 Gene Heskett :
>  I didn't expect a 10 dollar shipping rip off though.  That
> brings it up to about $36.  Reminds me of ebay.

Too late now, but did you check eBay? There are folk on there
reselling small quantities.

-- 
atp

--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Beginner question

[Gene Heskett]

On Wednesday 08 July 2009, Dave Engvall wrote:
>On Jul 8, 2009, at 1:40 AM, Gene Heskett wrote:
>> On Tuesday 07 July 2009, Peter Cauchy wrote:
>>> Thanks for the replies,
>>>
>>> Part of the issue is I do not have the mill completely square, and it
>>> was cutting without stuttering, but I was tightening the
>>> tolerances and
>>> started losing steps due to friction.
>>
>> That is often something that can be helped with the right lube, and
>> its been
>> recommended to use a Mobil product called Vectron (IIRC) for that.
>> Unforch it
>> only comes in 5 gallon pails, which would be several of my
>> remaining lifetimes
>> worth, so I have not obtained any of it, yet.
>
>Vactra No. 2 which is the right grade for small to medium machine
>tools is available
>from MSC in one gal containers. # 60002151 for about $20.
>Indeed a gallon will last a long time. I just finished my first 5 gal
>pail and that took
>10 years or so.
>
>HTH
>
>Dave
>
>
Thanks for the name correction Dave, and a src of smaller amounts at MSC.  My 
local Mobil wholesaler wanted over $85 for a 5 gallon pail, and would have had 
to order it with a 2-3 week delay.  I probably don't have 10 years left, 
already 74, diabetic & right now killing time while the last 1/4" of my ring 
finger grows back after trimming the fingernail with my jointer.  (That is an 
ouch for sure)  The heal is slow because of the diabetes, in 9 days it is 
finally undressing w/o a bloody dressing.

I wouldn't be using it in a production environment anyway, but a gallon I can 
well afford.  I didn't expect a 10 dollar shipping rip off though.  That 
brings it up to about $36.  Reminds me of ebay.  But its ordered... :)

-- 
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.


It is better to kiss an avocado than to get in a fight with an aardvark.


--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Axis Plot Screen

[Gene Heskett]

On Wednesday 08 July 2009, Andy Pugh wrote:
>2009/7/8 Jim Wilkin :
>> Just got my a axis going and noticed that the Axis plot screen doesn't
>> show the A axis.
>
>I noticed the same thing, but decided it was probably deliberate, as I
>can't imagine how you would show the A axis movement without knowing
>the absolute position and direction of the centre of rotation of A
>relative to the other axes.

I think you both might have a config error as running 2.2.8 here, the A axis 
is assumed to be rotating the cutter image about the long axis of the x axis.  
That may well NOT be how you have it bolted down, but it does show.

-- 
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.


Let him choose out of my files, his projects to accomplish.
-- Shakespeare, "Coriolanus"


--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo tuning

[Peter C. Wallace]

On Wed, 8 Jul 2009, Leslie Newell wrote:

> Date: Wed, 08 Jul 2009 16:47:59 +0100
> From: Leslie Newell 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: Re: [Emc-users] Servo tuning
> 
> Hi Peter,
>
> One division = 0.01mm.
>
> Which screenshot are you looking at? The shot without I shows a very
> small static error (around 1 - 2 counts). The end of the plot in the
> first shot is not static error. The plot simply ran out of time before
> the system reached steady state.

The point at the end of movement seems not to be corrected by the P term
Unless this is just integrator windup. Can you do the same plot with no 
integral term?




>
> P and D are about as high as they will go. Any more and I get oscillation.
>
> Les
>
>> Also looking more carefully at the plot, you have a large static error (maybe
>> huge: is 10m 10 mills?) This means you dont have enough P
>>
>
>
> --
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>

Peter Wallace
Mesa Electronics

(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.


--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo tuning

[Leslie Newell]

Hi Peter,

One division = 0.01mm.

Which screenshot are you looking at? The shot without I shows a very 
small static error (around 1 - 2 counts). The end of the plot in the 
first shot is not static error. The plot simply ran out of time before 
the system reached steady state.

P and D are about as high as they will go. Any more and I get oscillation.

Les

> Also looking more carefully at the plot, you have a large static error (maybe 
> huge: is 10m 10 mills?) This means you dont have enough P
>   


--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo tuning

[Peter C. Wallace]

On Wed, 8 Jul 2009, Leslie Newell wrote:

> Date: Wed, 08 Jul 2009 13:23:59 +0100
> From: Leslie Newell 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: Re: [Emc-users] Servo tuning
> 
> I have just got the lathe on the internet so I uploaded a screen shot of
> the I weirdness . It shows a long
> move followed by the term returning the axis to position. The big spikes
> are accel/decel. Here is a shot with the I term turned down to 0 but
> everything else the same . I still
> need to play around with the tuning to get rid of those acceleration
> spikes. The accel is set very high at the moment for testing purposes.
>
> Les
>
> --
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>

Also looking more carefully at the plot, you have a large static error (maybe 
huge: is 10m 10 mills?) This means you dont have enough P



Peter Wallace
Mesa Electronics

(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.


--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Beginner question

[Dave Engvall]

On Jul 8, 2009, at 1:40 AM, Gene Heskett wrote:

> On Tuesday 07 July 2009, Peter Cauchy wrote:
>> Thanks for the replies,
>>
>> Part of the issue is I do not have the mill completely square, and it
>> was cutting without stuttering, but I was tightening the  
>> tolerances and
>> started losing steps due to friction.
>
> That is often something that can be helped with the right lube, and  
> its been
> recommended to use a Mobil product called Vectron (IIRC) for that.   
> Unforch it
> only comes in 5 gallon pails, which would be several of my  
> remaining lifetimes
> worth, so I have not obtained any of it, yet.

Vactra No. 2 which is the right grade for small to medium machine  
tools is available
from MSC in one gal containers. # 60002151 for about $20.
Indeed a gallon will last a long time. I just finished my first 5 gal  
pail and that took
10 years or so.

HTH

Dave

>


--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Axis Plot Screen

[Andy Pugh]

2009/7/8 Jim Wilkin :

> Just got my a axis going and noticed that the Axis plot screen doesn't
> show the A axis.

I noticed the same thing, but decided it was probably deliberate, as I
can't imagine how you would show the A axis movement without knowing
the absolute position and direction of the centre of rotation of A
relative to the other axes.

-- 
atp

--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo tuning

[Peter C. Wallace]

On Wed, 8 Jul 2009, Leslie Newell wrote:

> Date: Wed, 08 Jul 2009 13:23:59 +0100
> From: Leslie Newell 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: Re: [Emc-users] Servo tuning
> 
> I have just got the lathe on the internet so I uploaded a screen shot of
> the I weirdness . It shows a long
> move followed by the term returning the axis to position. The big spikes
> are accel/decel. Here is a shot with the I term turned down to 0 but
> everything else the same . I still
> need to play around with the tuning to get rid of those acceleration
> spikes. The accel is set very high at the moment for testing purposes.
>
> Les

IMHO you need to turn off I, and get the FE under control with P,D and FF1 
before using I at all.

adjusting FF1 should allow you to make the FE go either positive or negative
as the velocity ramps up, you currently have a large negative FE, If this 
means motion is lagging, that means you need more FF1


The trick with FF1 and bare PWM amps is that you want FF1 set so that the PWM 
output voltage (BusV*PWM) = the motors BEMF at any velocity.

Once the FE is under better control, I would bump up the I term so the 
response time of I is much faster, maybe .1 second or faster


>
> --
> Enter the BlackBerry Developer Challenge
> This is your chance to win up to $100,000 in prizes! For a limited time,
> vendors submitting new applications to BlackBerry App World(TM) will have
> the opportunity to enter the BlackBerry Developer Challenge. See full prize
> details at: http://p.sf.net/sfu/Challenge
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>

Peter Wallace
Mesa Electronics

(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.


--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

[Emc-users] Axis Plot Screen

[Jim Wilkin]

Have been running emc2 for about two years.
Upgraded to latest live cd .
My setup uses stepper xyza .
Just got my a axis going and noticed that the Axis plot screen doesn't 
show the A axis.
Is this normal or have I overlooked something ?
Keep up the good work and thanks for everything.
Jim 


--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo tuning

[Leslie Newell]

I have just got the lathe on the internet so I uploaded a screen shot of 
the I weirdness . It shows a long 
move followed by the term returning the axis to position. The big spikes 
are accel/decel. Here is a shot with the I term turned down to 0 but 
everything else the same . I still 
need to play around with the tuning to get rid of those acceleration 
spikes. The accel is set very high at the moment for testing purposes.

Les

--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] RELEASED: emc 2.3.2

[Jeff Epler]

2.3.2 packages are now available for Ubuntu 6.06 "Dapper Drake" as well.

Jeff

--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Beginner question

[Rob Jansen]

Peter,

> my driver is a CMD-50c  which can handle 15-40v, and 3.5 amps, but I do 
> not have access to anything above the 19v I currently have. 
>
> Thanks for everything, it looks like I will be looking for other motors. 
>   
Try to get hold of a power supply with a higher voltage.
Coils, as used in the motors, will try to prevent any change in current. 
A higher input voltage for the driver will result in a higher current 
through the motor.
The motor will deliver the highest torque with high current so if the 
motor should be up to the job, upgrading the power supply could do the 
trick.

Larger motors with the same drivers may not change you current situation.

So before buying new motors I would try a power supply with a higher 
voltage (borrow one if you can).
Bigger motors have another disadvantage: due to the higher mass of the 
rotor speed and acceleration are limited. A larger motor than necessary 
is also not optimal.

Good luck,

Rob

--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] OpenGL on EMC2? + 7i43

[Sven Wesley]

Both sides have given their opinions. For the second time, let this go now.
Please?

Regards,
Sven


2009/7/8 Leslie Newell 

> I just looked back though al of your posts in this thread. They are all
> about problems with the operating system, not EMC. Why are you blaming
> the EMC guys? If you bought some Windows software then found Windows
> didn't like your computer, would you blame the suppliers of the software?
> ...
>
--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] OpenGL on EMC2? + 7i43

[Leslie Newell]

I just looked back though al of your posts in this thread. They are all 
about problems with the operating system, not EMC. Why are you blaming 
the EMC guys? If you bought some Windows software then found Windows 
didn't like your computer, would you blame the suppliers of the software?

FWIW I recently purchased a 7i20 for my lathe and it is running fine. 
Yes I did have to spend some time trawling the linuxcnc website for the 
relevant info but apart from that it pretty much works as described.

Les


Richard Acosta wrote:
> I have bough a board, directed by EMC people.
> I am not dissapointed with MEsa, i'm dissapointed with the people who 
> advised me.
> 

--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Beginner question

[Gene Heskett]

On Tuesday 07 July 2009, Peter Cauchy wrote:
>Thanks for the replies,
>
>Part of the issue is I do not have the mill completely square, and it
>was cutting without stuttering, but I was tightening the tolerances and
>started losing steps due to friction.

That is often something that can be helped with the right lube, and its been 
recommended to use a Mobil product called Vectron (IIRC) for that.  Unforch it 
only comes in 5 gallon pails, which would be several of my remaining lifetimes 
worth, so I have not obtained any of it, yet.

>Gene,
>
>my driver is a CMD-50c  which can handle 15-40v, and 3.5 amps, but I do
>not have access to anything above the 19v I currently have.

A fairly common surplus (from M.P.Jones maybe?) 25.2 volt transformer feeding 
a full wave bridge should give around 35 volts assuming a sufficient sized 
filter capacitor. How much current do the motors say they need?  Multiply that 
by the number of motors to get the total current you need.  Then you know how 
big a transformer you need (they can be paralleled for more amperage) and how 
much current the FW bridge needs to be rated at or above.

Generally speaking, these drivers won't be happy when running on a regulated 
supply, because the stepper motors can also send power back to the supply, and 
regulated ones don't absorb this back current at all well & may even shut 
down.  So its best to just have a large (2200 uf or more) capacitor as the 
filter that can absorb these surges without actually running the voltage above 
the drivers ratings even for a microsecond.  I built mine from the remains of 
an old 2" video recorder, one of the half ton models and it had a pair of 
75,000 uf caps, but that is extreme overkill.

If you have a 30" x table, that is going to need the biggest Nema 23 motors, 
Jeff at xylotex has some nice ones that can make 400 oz or more, or even a 
Nema 34.  I have a Nema 23 rated at 425 oz on my Z axis, 10 tpi acme screw, 
with a 17/42 gilmer belt type stepdown rigging between motor and screw, and at 
2.5 amps, I can put 155 pounds of down force on a drill bit to drill a hole.  
My X/Y motors are smaller 225 oz versions, direct coupled to the micromills 20 
tpi acme screws, and they can break a 1/4" solid carbide mill in a heartbeat 
if the spindle stalls, so that should give you an idea of what it takes to at 
least get started.

>Thanks for everything, it looks like I will be looking for other motors.
>The z-axis is 4 in and works  alright, but the y-axis at 14 inches is
>underpowered, and the x-axis at 30 inches hardly moves without stuttering.

I can see why, although those motors could probably move it at 3 or 4 ipm at 
that voltage, they may stall when actually cutting.  The z probably doesn't 
have what it takes to drill a hole in ferrous material.

>Chris,
>
>I did change the step output to be inverted as you suggested, and no
>noticeable change in speed.

-- 
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.


Be careful how you get yourself involved with persons or situations that
can't bear inspection.


--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] OpenGL on EMC2? + 7i43

[Chris Morley]

  

> Date: Wed, 8 Jul 2009 00:30:22 -0300
> From: eyela...@gmail.com
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] OpenGL on EMC2? + 7i43
> 
> I have bough a board, directed by EMC people.
> I am not dissapointed with MEsa, i'm dissapointed with the people who 
> advised me.
> 
> In my country, when */you/* direct someone to buy/do something that 
> gives /*you*/ _.OR._ another an unjustified profit while the 
> buyer/customer/doer gets a dissadvantage /*YOU*/ are responsible. That's 
> called fraud and /*you*/ go to jail.
> 


Richard

First this is all my personal opinion not the EMC group's.

Is an apology you are looking for?
I am a member of EMC's development.  I, personally am sorry
that your experience with EMC was less then what you hoped.
I can assure you no one was trying to pull a fast one on you.
Certainly no one was trying to fraud you.
The hostmot2 software was and is very new. When the person who
writes the software tests it it is fairly easy to miss bugs because the 
person tends to use it as he intended. The more it is used by other people
(especially non programmers) the more these are flushed out. As Developers
we support this by fixing them as best and fast as we can. Now programmers 
(as a rule) are just terrible about documentation. Docs are boring - new 
features
are fun. 
Actually the docs are way way better now then even a year ago, as far as being 
up to date, correct and usable. But they are just like the software / 
programmers. 
When you write them they make sense to you but you knew what you meant!
On top of that, in a rapidly developing project it's pretty easy to have the 
docs 
(usually just slightly) out of date. 

We are not perfect - we just try to do our best.

On our side, yes maybe we need to evaluate how we release or advertise the
state of our software. In fact we have already discussed it in general, to avoid
problems.
The real problem comes that we think it is right/ bug free because we have 
tested / used it . But the software is complicated and flexible- we need more 
people to test / use it. We don't pay people to test. I'm pretty sure profit 
companies do. So we release it. If and when problems come up we fix them.
In most cases the problems that come up are obscure / minor anyways.
Usually this works very well-sometimes not so well.

I understand it can be very frustrating, it is frustrating for us too- we want 
people
to have success and fun with EMC!
But no one likes to be 'beat-up' over these problems, especially if we are not 
paid
to put up with it. We do this because we like the challenge, or like to give 
back,
or like to tinker.

So Richard again I am sorry things worked out so badly for you.
If you still want help with using the mesa board and EMC we can
help but you have to stop the negativity now. Your point is across now

To everyone else: We got our point across too - lets move on to some
positive energy. If things need changing to help a new person out then
lets hear it or volunteer to help do it. If there is problems or disappointments
lets get to the point, keep the negativity to the minimum,  And lets fix it!

I think what this situation is really saying is that EMC is getting heard about-
now it's not just the gurus and power tinkers that want to use it, regular 
people who don't want to invest the time to learn why something works 
they just want to use it. As far as I'm concerned I say welcome- we'll try to 
help.

Chris Morley
 

_
Attention all humans. We are your photos. Free us.
http://go.microsoft.com/?linkid=9666046
--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] OpenGL on EMC2? + 7i43

[Rob Jansen]

Richard,

quoting from one of your earlier mails:

>Thanks to everyone who tryed to help, thanks to everyone behind such a 
>great project.

Dito!
I had a bit more success than you had with the support from this list. I 
had some problems with the Mesa HM2 configuration files that were solved 
thanks to this list.

>I know there is a lot of people with functional machines, nicely done 
>retrofittings, etc... but...
>Was all that applied to the industry, was all that applied to a real 
>productive environment? o was as it seems applied to hobbyst 
>environments where everything can work partially?


My machine is a production machine and it is being used on a daily base.
There are some limitations (like having only 8 palleting positions ;-) ) 
but I learned to live with those. Even commercial production machines 
have limitations.

I have seen more LinuxCNC production machines, like a pipe bending 
machine, and I am now in the process of looking at EMC2 to control a 
plasma pipe cutter (to cut holes and 'V' shaped ends).

 >The support on LinuxCNC is clearly the biggest weakness.
> I bought a card that EMC told me was fully supported and functional, the 
> only reason i did it was because that was awritten in manuals and EMC 
> people told it was supported.
>   

There is no "EMC" to tell you what is fully supported.
Also there is no fully support.

EMC is an open source project kept alive since 2001 (as far as I can 
remember). These guys did a good job of maintaining EMC and supporting 
people that join the mailing lists.
Meanwhile I am becoming part of this community: I located some features 
that were not working correctly (for my situation) and these are now 
fixed, I helped out a few of the beginners with their configurations and 
am helping out a number of local EMC users with their problems.

Telling me that the support is the biggest weakness hurts. There are a 
lot of persons on this list (including me) trying to help out where we 
can. 95% of all the EMC users are happy with their setup, 4% (or more) 
has problems that are fixed thanks to this mailing list and the 
remaining (1% or less) of the users have problems that are not solved 
due to different reasons.

I (we) are sad to read that your problem is not solved and that you are 
an unhappy EMC user.
Please let us stop this endless quarrel about EMC support.

Regards,

Rob

--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Beginner question

[Peter Cauchy]

Thanks for the replies,

Part of the issue is I do not have the mill completely square, and it 
was cutting without stuttering, but I was tightening the tolerances and 
started losing steps due to friction.

Gene, 

my driver is a CMD-50c  which can handle 15-40v, and 3.5 amps, but I do 
not have access to anything above the 19v I currently have. 

Thanks for everything, it looks like I will be looking for other motors. 
The z-axis is 4 in and works  alright, but the y-axis at 14 inches is 
underpowered, and the x-axis at 30 inches hardly moves without stuttering.


Chris,

I did change the step output to be inverted as you suggested, and no 
noticeable change in speed.



--
Enter the BlackBerry Developer Challenge  
This is your chance to win up to $100,000 in prizes! For a limited time, 
vendors submitting new applications to BlackBerry App World(TM) will have
the opportunity to enter the BlackBerry Developer Challenge. See full prize  
details at: http://p.sf.net/sfu/Challenge
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users