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#19441 From: Jerry Jankura <toolznglue@...>
Date: Sun Dec 21, 2008 5:18 am
Subject: Re: I wish I was savvy with DOS
toolznglue
Send Email Send Email
 
On Dec 20, 2008, at 11:00 PM, Tracy Presnell wrote:

> You have to run turbo in a clean DOS boot. It will not run in a DOS
> window. There is no parallel port driver required. However, the port
> needs to be set correctly in the BIOS.

Actually, TurboCNC will run in a DOS box under windows, but you won't
like the results. If you're running the box within Windows 98 (or
windows 3.1, for that matter) you'll find that the step pulse stream
sent to your motor drive is not robust. That is, there will be some
significant gaps between pulses cause by Windows internal
housekeeping. The end result - you'll either have to run extremely
slowly or you'll stall the motors.

With Windows XP, it's a different story. XP will not allow TurboCNC to
toggle the I/O port so you'll never send step or direction signals to
the motor drive, although everything will look as if it's working.

In DOS, you can also get into problems if you have any kind of memory
manager - HIMEM.SYS or EMM386 to name a few - running. Both of these
managers tap into the interrupt structure to do some of their work and
will disrupt the pulse stream.

The bottom line - if you want a good, clean pulse stream, boot
directly into DOS and use NO memory managers other than the one that's
supplied by Borland and loaded automatically when you load TurboCNC.

Hope this helps clarify things....

Jerry Jankura
So many toys.... So little time....

#19442 From: "Chrismo_98" <chrismo_98@...>
Date: Sun Dec 21, 2008 1:52 pm
Subject: Re: I wish I was savvy with DOS
Chrismo_98
Send Email Send Email
 
When I restart in DOS mode, the front page says that "BIOS reports
available parallel ports on this machine" and lists LPT1 at the correct
address.  When I try to jog, G01 or toggle pins in the port monitor,
there are no signals sent from the parallel port.
     Is Windows disabling (or rather-not enabling) the port when it
restarts?  I only think that because the parallel port DOES work when I
use a DOS box in Windows.

#19443 From: "dgoadby" <david@...>
Date: Sun Dec 21, 2008 3:48 pm
Subject: Re: I wish I was savvy with DOS
dgoadby
Send Email Send Email
 
--- In turbocnc@yahoogroups.com, "Chrismo_98" <chrismo_98@...> wrote:
>
> When I restart in DOS mode, the front page says that "BIOS reports
> available parallel ports on this machine" and lists LPT1 at the correct
> address.  When I try to jog, G01 or toggle pins in the port monitor,
> there are no signals sent from the parallel port.
>     Is Windows disabling (or rather-not enabling) the port when it
> restarts?  I only think that because the parallel port DOES work when I
> use a DOS box in Windows.
>

If you boot DOS then the ports that the BIOS shows you will be
available,  nothing is disabled. If the I/O address and interrupt are
the same as those you set in TCNC then it should work ok. If there is
a legacy option then that is what you want.

I would check the autoexec.bat and config.sys files for any other
loaded software. If there is then try removing them and trying again.

AFAIK you can run TCNC with both files empty. There may be keyboard
character issues (£/$ etc) but they can be sorted out later once TCNC
is working.

If that still doesn't work then can you tell us the motherboard make
and model and BIOS.

#19444 From: "Chrismo_98" <chrismo_98@...>
Date: Sun Dec 21, 2008 8:23 pm
Subject: Re: I wish I was savvy with DOS
Chrismo_98
Send Email Send Email
 
> AFAIK you can run TCNC with both files empty. There may be keyboard
> character issues (£/$ etc) but they can be sorted out later once TCNC
> is working.
>
> If that still doesn't work then can you tell us the motherboard make
> and model and BIOS.
>
I blanked both out and it worked fine.  No mouse, but so far it's
faster to use the keyboard.  I can deal with the mouse later.  Thanks
for your help.

#19445 From: "Jeff Demand" <jdemand@...>
Date: Sun Dec 21, 2008 8:40 pm
Subject: Re: Re: I wish I was savvy with DOS
jpdemand
Send Email Send Email
 
Forget the mouse, just asking for trouble with no gain. Keyboard works just
fine. I can boot win with a mouse but none of my DOS boots contain mouse
drivers.

Jeff

*********** REPLY SEPARATOR  ***********

On 12/21/2008 at 8:23 PM Chrismo_98 wrote:

>> AFAIK you can run TCNC with both files empty. There may be keyboard
>> character issues (£/$ etc) but they can be sorted out later once TCNC
>> is working.
>>
>> If that still doesn't work then can you tell us the motherboard make
>> and model and BIOS.
>>
>I blanked both out and it worked fine.  No mouse, but so far it's
>faster to use the keyboard.  I can deal with the mouse later.  Thanks
>for your help.
>
>
>------------------------------------
>
>
>
>Yahoo! Groups Links
>
>
>
>
>No virus found in this incoming message.
>Checked by AVG - http://www.avg.com
>Version: 8.0.176 / Virus Database: 270.9.19/1859 - Release Date:
12/20/2008 2:34 PM


-
Demand Designs
Analog/Digital Modelling & Goldsmithing

http://www.gmavt.net/~jdemand
jdemand@...
-

#19446 From: Art Eckstein <art.eckstein@...>
Date: Sun Dec 21, 2008 8:48 pm
Subject: Re: Re: I wish I was savvy with DOS
axtein
Send Email Send Email
 
Besides, if you move the mouse during an
operation it generates an interrupt even though it is supposedly turned off.
This messes with the output pulses and you have potentially ruined a part!

Bubba



At 03:40 PM 12/21/2008, you wrote:
>Forget the mouse, just asking for trouble with no gain. Keyboard works just
>fine. I can boot win with a mouse but none of my DOS boots contain mouse
>drivers.
>
>Jeff
>
>*********** REPLY SEPARATOR  ***********
>
>On 12/21/2008 at 8:23 PM Chrismo_98 wrote:
>
> >> AFAIK you can run TCNC with both files empty. There may be keyboard
> >> character issues (£/$ etc) but they can be sorted out later once TCNC
> >> is working.
> >>
> >> If that still doesn't work then can you tell us the motherboard make
> >> and model and BIOS.
> >>
> >I blanked both out and it worked fine.  No mouse, but so far it's
> >faster to use the keyboard.  I can deal with the mouse later.  Thanks
> >for your help.
> >
> >
> >------------------------------------
> >

#19447 From: Slavko <eslavko@...>
Date: Mon Dec 22, 2008 12:00 pm
Subject: Happy X-mas
slavkok
Send Email Send Email
 
Hello..

Happ x-mas to all, and hope to Dave have some present for all us. :)

#19448 From: Mehran Valafar <valasoft@...>
Date: Mon Dec 22, 2008 3:01 pm
Subject: RE: Happy X-mas
valasoft
Send Email Send Email
 
Merry xmas to all turbo cnc users

-----Original Message-----
From: Slavko <eslavko@...>
Sent: Monday, December 22, 2008 3:30 PM
To: turbocnc@yahoogroups.com
Subject: [turbocnc] Happy X-mas

Hello..

  Happ x-mas to all, and hope to Dave have some present for all us. :)

  Messages in this topic  (1)  Reply  (via web post)  | Start a new topic
Messages

[The entire original message is not included]

[Non-text portions of this message have been removed]

#19449 From: "JCullins" <james_cullins@...>
Date: Mon Dec 22, 2008 3:21 pm
Subject: RE: Merry Christmas
jtcullins
Send Email Send Email
 
Merry Christmas to all and a healthy and prosperous new year.
Jim

www.soundlogicus.com
Plasma THC-300
Serial Spindle Speed control


-----Original Message-----
From: turbocnc@yahoogroups.com [mailto:turbocnc@yahoogroups.com] On Behalf
Of Mehran Valafar
Sent: Monday, December 22, 2008 9:01 AM
To: turbocnc@yahoogroups.com
Subject: RE: [turbocnc] Happy X-mas

Merry xmas to all turbo cnc users

-----Original Message-----
From: Slavko <eslavko@...>
Sent: Monday, December 22, 2008 3:30 PM
To: turbocnc@yahoogroups.com
Subject: [turbocnc] Happy X-mas

Hello..

  Happ x-mas to all, and hope to Dave have some present for all us. :)

  Messages in this topic  (1)  Reply  (via web post)  | Start a new topic
Messages

[The entire original message is not included]

[Non-text portions of this message have been removed]


------------------------------------



Yahoo! Groups Links

#19450 From: "das_innere_ich" <tommy.ramberg@...>
Date: Tue Dec 23, 2008 6:40 pm
Subject: Re: Happy X-mas
das_innere_ich
Send Email Send Email
 
Merry christmas everyone! My greatest wish is for some CV! :D

--- In turbocnc@yahoogroups.com, Mehran Valafar <valasoft@...> wrote:
>
> Merry xmas to all turbo cnc users
>
> -----Original Message-----
> From: Slavko <eslavko@...>
> Sent: Monday, December 22, 2008 3:30 PM
> To: turbocnc@yahoogroups.com
> Subject: [turbocnc] Happy X-mas
>
> Hello..
>
>  Happ x-mas to all, and hope to Dave have some present for all
us. :)
>
>  Messages in this topic  (1)  Reply  (via web post)  | Start a new
topic
> Messages
>
> [The entire original message is not included]
>
> [Non-text portions of this message have been removed]
>

#19451 From: "phamiltonsmith" <phamiltonsmith@...>
Date: Sat Dec 27, 2008 2:13 am
Subject: Help!!
phamiltonsmith
Send Email Send Email
 
Hi folks, I just moved house and in the move damaged the disk on the
computer controlling my machine!! needlesstosay i Lost everything, all
my settings, files... the lot

So, i now have a new disk and set things up again. However, i have a
strange error i cant quite figure out.

When i hit jog (f8) and then hit the displace keys for any axis, the
jog only works one step at a time in one direction only and only if i
first hit the other direction. Its easier to explain with an example:

if i continuously hit the left left key, it only displaces one step.
If i continuously hit the right key, nothing happens.
if i then hit the left key then right key then left key and so on, it
displaces everytime i hit the left key...

So what gives?

TIA
Paul

#19452 From: Rich Taylor <rich99206@...>
Date: Sat Dec 27, 2008 5:57 pm
Subject: Re: Help!!
rich99206
Send Email Send Email
 
Take me off your email list .

--- On Fri, 12/26/08, phamiltonsmith <phamiltonsmith@...> wrote:

From: phamiltonsmith <phamiltonsmith@...>
Subject: [turbocnc] Help!!
To: turbocnc@yahoogroups.com
Date: Friday, December 26, 2008, 6:13 PM






Hi folks, I just moved house and in the move damaged the disk on the
computer controlling my machine!! needlesstosay i Lost everything, all
my settings, files... the lot

So, i now have a new disk and set things up again. However, i have a
strange error i cant quite figure out.

When i hit jog (f8) and then hit the displace keys for any axis, the
jog only works one step at a time in one direction only and only if i
first hit the other direction. Its easier to explain with an example:

if i continuously hit the left left key, it only displaces one step.
If i continuously hit the right key, nothing happens.
if i then hit the left key then right key then left key and so on, it
displaces everytime i hit the left key...

So what gives?

TIA
Paul


















[Non-text portions of this message have been removed]

#19453 From: Jerry Jankura <toolznglue@...>
Date: Sun Dec 28, 2008 4:33 am
Subject: Re: Help!!
toolznglue
Send Email Send Email
 
On Dec 27, 2008, at 12:57 PM, Rich Taylor wrote:

> Take me off your email list .

Please visit groups.yahoo.com/group/turbocnc and remove yourself.

Jerry Jankura
So many toys.... So little time....

#19454 From: "pwintulich" <peter@...>
Date: Mon Dec 29, 2008 11:07 pm
Subject: Re: Help!!
pwintulich
Send Email Send Email
 
Hello Paul,

I think you have the pins Step and Direction swaped over in the setup
file.

The single step you observe is probably the direction pin changing
polarity (when connected to the drivers step input). So it will only
change the first time you hit the left arrow, will be reset when you
press the Right arrow. You should observe that if you alternately hit
the jog keys ie. left, right, left, right, left you will step one step
on every left key stroke no matter what the jog multiplier is at.

Regards Peter Wintulich


--- In turbocnc@yahoogroups.com, "phamiltonsmith" <phamiltonsmith@...>
wrote:
>
> Hi folks, I just moved house and in the move damaged the disk on the
> computer controlling my machine!! needlesstosay i Lost everything, all
> my settings, files... the lot
>
> So, i now have a new disk and set things up again. However, i have a
> strange error i cant quite figure out.
>
> When i hit jog (f8) and then hit the displace keys for any axis, the
> jog only works one step at a time in one direction only and only if i
> first hit the other direction. Its easier to explain with an example:
>
> if i continuously hit the left left key, it only displaces one step.
> If i continuously hit the right key, nothing happens.
> if i then hit the left key then right key then left key and so on, it
> displaces everytime i hit the left key...
>
> So what gives?
>
> TIA
> Paul
>

#19455 From: "Ronaldo F Cavalcante" <ronaldofcavalcante@...>
Date: Mon Dec 29, 2008 8:02 pm
Subject: CONFIGURATION OF TURBOCNC
rfcavalcante
Send Email Send Email
 
Hi, group:
I'm brazilian and I need your help!

I can't put my motors to run (only micro step in the same place) .
This is my configuration:

Motor Action 7,5 kgcm; 1,8° ; 200 steps ; 3 V ; 2,4 A 1,8 ohms
drive board Hobbycnc step/dir 24 v 2,5 A /motor

at configure axes:
calc: Steps/Rev = 200 ; Pitch (mm) = 5 ; Micro step=1; ratio 1:1

scale = 0,025 ; acel=2000 H/s ; Start vel=250 Hz ; Max vel=1000 Hz ;
Backlash=0 mm ; Slow jog=100hz ; Fast jog=1000 ;

result: Start speed is 375 mm/m ; Mas speed is 1500 mm/m reached in
0,35sec ; while moving 3,516 mm

and ArcFactor = 1
I tried other configurations tha I saw at web but return the same
result.

What's wrong please ?!

ronaldo

#19456 From: "JimWaterman" <chjwte@...>
Date: Tue Dec 30, 2008 4:19 am
Subject: CNC appliance
JimWaterman
Send Email Send Email
 
I have just finished converting a winterm into an solid state cnc
computer.
It has not moving parts and is only about 12 inches tall and 4 inches
wide.
It only uses about 25 watts.
I have access to a few and was wondering I anyone would be interested?
Thanks

#19457 From: "Mark" <mktool@...>
Date: Sat Dec 27, 2008 6:19 am
Subject: RE: Re: Happy X-mas
mkt10121012
Send Email Send Email
 
I recall that Constant velocity and cutter comp was close, any recent news.



From: turbocnc@yahoogroups.com [mailto:turbocnc@yahoogroups.com] On Behalf
Of das_innere_ich
Sent: Tuesday, December 23, 2008 10:41 AM
To: turbocnc@yahoogroups.com
Subject: [turbocnc] Re: Happy X-mas



Merry christmas everyone! My greatest wish is for some CV! :D

--- In turbocnc@yahoogroups.com <mailto:turbocnc%40yahoogroups.com> , Mehran
Valafar <valasoft@...> wrote:
>
> Merry xmas to all turbo cnc users
>
> -----Original Message-----
> From: Slavko <eslavko@...>
> Sent: Monday, December 22, 2008 3:30 PM
> To: turbocnc@yahoogroups.com <mailto:turbocnc%40yahoogroups.com>
> Subject: [turbocnc] Happy X-mas
>
> Hello..
>
> Happ x-mas to all, and hope to Dave have some present for all
us. :)
>
> Messages in this topic (1) Reply (via web post) | Start a new
topic
> Messages
>
> [The entire original message is not included]
>
> [Non-text portions of this message have been removed]
>





[Non-text portions of this message have been removed]

#19458 From: "Dave Kowalczyk" <dkowalcz@...>
Date: Tue Dec 30, 2008 5:13 am
Subject: Re: Industrial PM/AC servos
dkowalcz2000
Send Email Send Email
 
Bert:

   Yes, three brands that I'm aware of (Panasonic, Sanyo-Denki, and
Yaskawa) have step/direction inputs for position control on most of
their models.  The PID loop is closed locally at the drive, as with
the Gecko servodrives.

   Usually these are differential inputs for noise immunity, so you'll
need to get (or build) a converter to go from TTL to differential
signals at the parallel port.  This can be as simple as a few
comparator chips and logic gates, but I'm sure that someone makes a
board that does this also.

-Dave Kowalczyk
http://www.dakeng.com

--- In turbocnc@yahoogroups.com, "bertakeeliasson"
<bert-ake.eliasson@...> wrote:
>
> Hi!
> Is it possible to run ordinary AC servo units instead of steppers?
> If so, how does the interface look like between turbocnc PC and AC
> servo?
>
> Thanks!
> /Bert
>

#19459 From: "oerehak" <oerehak@...>
Date: Tue Dec 30, 2008 1:53 pm
Subject: Re: Happy X-mas
oerehak
Send Email Send Email
 
Mark
   Check out Daves web site www.dakeng.com for some late news.
   Jack


--- In turbocnc@yahoogroups.com, "Mark" <mktool@...> wrote:
>
> I recall that Constant velocity and cutter comp was close, any
recent news.
>
>

#19460 From: Jorge Lourenço Jr. <jorloujr@...>
Date: Tue Dec 30, 2008 3:07 pm
Subject: RES: CONFIGURATION OF TURBOCNC
jorloubr
Send Email Send Email
 
Ronaldo, subscreva a lista PlotterCressoft
[plotter_CRESsoft-unsubscribe@yahoogroups.com ] e/ou o fórum Guia CNC [
WWW.guiacnc.com .br ] onde vai ter toda a ajuda de que necessitar e em bom
português.



Abs

Jorge L.



   _____

De: turbocnc@yahoogroups.com [mailto:turbocnc@yahoogroups.com] Em nome de
Ronaldo F Cavalcante
Enviada em: segunda-feira, 29 de dezembro de 2008 18:02
Para: turbocnc@yahoogroups.com
Assunto: [turbocnc] CONFIGURATION OF TURBOCNC



Hi, group:
I'm brazilian and I need your help!

I can't put my motors to run (only micro step in the same place) .
This is my configuration:

Motor Action 7,5 kgcm; 1,8° ; 200 steps ; 3 V ; 2,4 A 1,8 ohms
drive board Hobbycnc step/dir 24 v 2,5 A /motor

at configure axes:
calc: Steps/Rev = 200 ; Pitch (mm) = 5 ; Micro step=1; ratio 1:1

scale = 0,025 ; acel=2000 H/s ; Start vel=250 Hz ; Max vel=1000 Hz ;
Backlash=0 mm ; Slow jog=100hz ; Fast jog=1000 ;

result: Start speed is 375 mm/m ; Mas speed is 1500 mm/m reached in
0,35sec ; while moving 3,516 mm

and ArcFactor = 1
I tried other configurations tha I saw at web but return the same
result.

What's wrong please ?!

ronaldo





[Non-text portions of this message have been removed]

#19461 From: "Roland Jollivet" <Roland.Jollivet@...>
Date: Tue Dec 30, 2008 5:33 pm
Subject: Ver5.0
jemelectric
Send Email Send Email
 
Hi Dave

Well, it does feel weird to run Tcnc in XP!

I notice though, that the config only allows Step/Dir (no stepper). Is this
to stay?

Also, after running the program, my windows program taskbar at the bottom of
the screen has dissapeared.

Regards
Roland



2008/12/30 oerehak <oerehak@...>

>    Mark
> Check out Daves web site www.dakeng.com for some late news.
> Jack
>
> --- In turbocnc@yahoogroups.com <turbocnc%40yahoogroups.com>, "Mark"
> <mktool@...> wrote:
> >
> > I recall that Constant velocity and cutter comp was close, any
> recent news.
> >
> >
>
>
>


[Non-text portions of this message have been removed]

#19462 From: "dan pines" <dan@...>
Date: Tue Dec 30, 2008 7:40 pm
Subject: TCNC 5.0
danpines
Send Email Send Email
 
Dave

in your site you state that ver. 5.0 is based the 4.01. I downloaded it
(looks strange..) but was surprised to see that the TCNC extensions
like if, ask, say etc. do not work.

I always thought these were the forte of TCNC. Did you really give them
up?

a happy new year to all

dan

#19463 From: "DANIEL HOOX" <turbihook@...>
Date: Wed Dec 31, 2008 1:06 am
Subject: Re: CONFIGURATION OF TURBOCNC
turbihook
Send Email Send Email
 
Hablas español? seria lindo compartir ideas sobre turbocnc


[Non-text portions of this message have been removed]

#19464 From: Jorge Lourenço Jr. <jorloujr@...>
Date: Wed Dec 31, 2008 2:06 am
Subject: RES: CONFIGURATION OF TURBOCNC
jorloubr
Send Email Send Email
 
Infelizmente não, mas compreendo bastante bem, se vc entende português não
há problemas ...



Saludos



Jorge L.



   _____

De: turbocnc@yahoogroups.com [mailto:turbocnc@yahoogroups.com] Em nome de
DANIEL HOOX
Enviada em: terça-feira, 30 de dezembro de 2008 23:07
Para: turbocnc@yahoogroups.com
Assunto: Re: [turbocnc] CONFIGURATION OF TURBOCNC



Hablas español? seria lindo compartir ideas sobre turbocnc


[Non-text portions of this message have been removed]





[Non-text portions of this message have been removed]

#19465 From: Jerry Jankura <toolznglue@...>
Date: Wed Dec 31, 2008 3:32 am
Subject: Re: TCNC 5.0
toolznglue
Send Email Send Email
 
On Dec 30, 2008, at 2:40 PM, dan pines wrote:

> in your site you state that ver. 5.0 is based the 4.01. I downloaded
> it
> (looks strange..) but was surprised to see that the TCNC extensions
> like if, ask, say etc. do not work.
>
> I always thought these were the forte of TCNC. Did you really give
> them
> up?

I've downloaded 5.0, but haven't had a chance to even try it. I'm
curious, though, what the update from 4.0 policy will be and will this
version also have the source code made available? In general, I like
the idea of moving the platform from DOS over to Windows.

Jerry Jankura
So many toys.... So little time....

#19466 From: "bertakeeliasson" <bert-ake.eliasson@...>
Date: Wed Dec 31, 2008 8:49 am
Subject: Re: Industrial PM/AC servos
bertakeeliasson
Send Email Send Email
 
Dont really follow you, how can a servo drive (AC or DC) have a step
input? I'm struggling to understand the definition of step, I mean
the motor in it self have no natural steps, right?

Thanks!
Bert

--- In turbocnc@yahoogroups.com, "Dave Kowalczyk" <dkowalcz@...>
wrote:
>
> Bert:
>
>   Yes, three brands that I'm aware of (Panasonic, Sanyo-Denki, and
> Yaskawa) have step/direction inputs for position control on most of
> their models.  The PID loop is closed locally at the drive, as with
> the Gecko servodrives.
>
>   Usually these are differential inputs for noise immunity, so
you'll
> need to get (or build) a converter to go from TTL to differential
> signals at the parallel port.  This can be as simple as a few
> comparator chips and logic gates, but I'm sure that someone makes a
> board that does this also.
>
> -Dave Kowalczyk
> http://www.dakeng.com
>
> --- In turbocnc@yahoogroups.com, "bertakeeliasson"
> <bert-ake.eliasson@> wrote:
> >
> > Hi!
> > Is it possible to run ordinary AC servo units instead of steppers?
> > If so, how does the interface look like between turbocnc PC and
AC
> > servo?
> >
> > Thanks!
> > /Bert
> >
>

#19467 From: Tracy Presnell <tpres@...>
Date: Wed Dec 31, 2008 1:51 pm
Subject: Re: Re: Industrial PM/AC servos
tpres500
Send Email Send Email
 
The control takes input steps and direction signals from the computer
and converts them into motor motion.

Tracy

bertakeeliasson wrote:
> Dont really follow you, how can a servo drive (AC or DC) have a step
> input? I'm struggling to understand the definition of step, I mean
> the motor in it self have no natural steps, right?
>
> Thanks!
> Bert
>
> --- In turbocnc@yahoogroups.com, "Dave Kowalczyk" <dkowalcz@...>
> wrote:
>
>> Bert:
>>
>>   Yes, three brands that I'm aware of (Panasonic, Sanyo-Denki, and
>> Yaskawa) have step/direction inputs for position control on most of
>> their models.  The PID loop is closed locally at the drive, as with
>> the Gecko servodrives.
>>
>>   Usually these are differential inputs for noise immunity, so
>>
> you'll
>
>> need to get (or build) a converter to go from TTL to differential
>> signals at the parallel port.  This can be as simple as a few
>> comparator chips and logic gates, but I'm sure that someone makes a
>> board that does this also.
>>
>> -Dave Kowalczyk
>> http://www.dakeng.com
>>
>> --- In turbocnc@yahoogroups.com, "bertakeeliasson"
>> <bert-ake.eliasson@> wrote:
>>
>>> Hi!
>>> Is it possible to run ordinary AC servo units instead of steppers?
>>> If so, how does the interface look like between turbocnc PC and
>>>
> AC
>
>>> servo?
>>>
>>> Thanks!
>>> /Bert
>>>
>>>
>
>
>

#19468 From: "PauloRoquetti" <pauloroquetti@...>
Date: Wed Dec 31, 2008 1:54 pm
Subject: 2000 + inove = renove
pauloroquetti
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QUE EM

2000 + INOVE = RENOVE

SAO OS VOTOS

DA FAMILIA ROQUETTI

QUE DEUS ABECOE A TODOS

[Non-text portions of this message have been removed]

#19469 From: Jerry Jankura <toolznglue@...>
Date: Wed Dec 31, 2008 6:20 pm
Subject: Re: Re: Industrial PM/AC servos
toolznglue
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On Dec 31, 2008, at 3:49 AM, bertakeeliasson wrote:

> Dont really follow you, how can a servo drive (AC or DC) have a step
> input? I'm struggling to understand the definition of step, I mean
> the motor in it self have no natural steps, right?

It's all a matter of how the hardware motor drive is designed. Gecko
seems able to reliably drive servo motors using a step and direction
signal. I suspect that, in very simplistic terms, the step pulse
drives the clock of a counter and the direction level determines
whether the counter counts up or down. The output of the counter is
fed, as a series of parallel bits, to a digital to analog decoder
which provides the set point voltage for the servo amp.

At least, that's the approach I'd take if I were trying to design such
a drive. :)

Jerry Jankura
So many toys.... So little time....

#19470 From: "Roland Jollivet" <Roland.Jollivet@...>
Date: Wed Dec 31, 2008 7:09 pm
Subject: Re: Re: Industrial PM/AC servos
jemelectric
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Hi

I think the OP is wanting to understand how a DC or AC motor can move in
single, discrete steps.

Download the following Microchip app note, which describes microstepping,
which is essentially PWM phase control. The same principle applies to AC
motors( without the complications of slip)

AN822

Also read;
AN696              DC servo-motor control

Regards
Roland



2008/12/31 Jerry Jankura <toolznglue@...>

>
> On Dec 31, 2008, at 3:49 AM, bertakeeliasson wrote:
>
> > Dont really follow you, how can a servo drive (AC or DC) have a step
> > input? I'm struggling to understand the definition of step, I mean
> > the motor in it self have no natural steps, right?
>
> It's all a matter of how the hardware motor drive is designed. Gecko
> seems able to reliably drive servo motors using a step and direction
> signal. I suspect that, in very simplistic terms, the step pulse
> drives the clock of a counter and the direction level determines
> whether the counter counts up or down. The output of the counter is
> fed, as a series of parallel bits, to a digital to analog decoder
> which provides the set point voltage for the servo amp.
>
> At least, that's the approach I'd take if I were trying to design such
> a drive. :)
>
> Jerry Jankura
> So many toys.... So little time....
>
>
>


[Non-text portions of this message have been removed]

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