Do AC servo motors all have same pinout on them for wiring as in universial

connector.  If not, how do you figure out wiring for a surplus motor.



cnc4me

Generally there will be two or three wires for the main windings (depending

on whether it is single phase or three phase brushless AC) and then several

signal wires for the encoder outputs (likely power, ground, A signal, and B

signal, and possibly index if its a standard quadrature encoder)  Generally,

the main power wires have no particular order, except that swapping two of

the three wires in a 3 wire system will reverse the motor's rotation.  The

encoder wires may be colored, but your best bet is to find the datasheet for

the actual encoder itself, something that should be available even if you

don't have information for the entire servo.



On Wed, Jun 16, 2010 at 13:19, cnc_4_me <cnc4me@...> wrote:



>

>

> Do AC servo motors all have same pinout on them for wiring as in universial

> connector. If not, how do you figure out wiring for a surplus motor.

>

> cnc4me

>

>

>





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

Is there a nameplate/dataplate on the motor?   Most of the AC servos I have

worked with over the years were 3 phase and the encoder was a integral part of

the assembly.  If you do have a dataplate on the assembly hopefully the name of

the manufacturer is on it as well as all of the electrical information, possible

even the wiring data.  If you have the mfr. name and the model you can probably

get all of the information you need online by doing a search for that mfr. and

model number.

 

Hope that helps a little.



Randy Abernathy

CNC and Industrial Machinery

service, repair, installation and

design



4626 Old Stilesboro Rd NW

Acworth, GA 30101

Fax: 770-974-5295

Phone: 678-982-0235

E-mail:

randyabernathy@...



--- On Wed, 6/16/10, Michael Fagan <woodworker88@...> wrote:





From: Michael Fagan <woodworker88@...>

Subject: Re: [CAD_CAM_EDM_DRO] How do you connect AC servo motor up

To: CAD_CAM_EDM_DRO@yahoogroups.com

Date: Wednesday, June 16, 2010, 4:41 PM





Generally there will be two or three wires for the main windings (depending

on whether it is single phase or three phase brushless AC) and then several

signal wires for the encoder outputs (likely power, ground, A signal, and B

signal, and possibly index if its a standard quadrature encoder)  Generally,

the main power wires have no particular order, except that swapping two of

the three wires in a 3 wire system will reverse the motor's rotation.  The

encoder wires may be colored, but your best bet is to find the datasheet for

the actual encoder itself, something that should be available even if you

don't have information for the entire servo.



On Wed, Jun 16, 2010 at 13:19, cnc_4_me <cnc4me@...> wrote:



>

>

> Do AC servo motors all have same pinout on them for wiring as in universial

> connector. If not, how do you figure out wiring for a surplus motor.

>

> cnc4me

>

> 

>





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

On Wed, Jun 16, 2010 at 3:19 PM, cnc_4_me <cnc4me@...> wrote:

> Do AC servo motors all have same pinout on them for wiring as in universial

connector.  If not, how do you figure out wiring for a surplus motor.

>

> cnc4me

>

NO

two different brands may even use same connectors , yet the signals

are on different pins

(eg Yaskawa and Panasonic use mini-scsi for one set of signals, many

similar, but a few very different signal locations)

How to find out?

read all the info on the motor itself and start googling & asking :)

hth

tomp

cnc_4_me wrote:

> Do AC servo motors all have same pinout on them for wiring as in universial

connector.  If not, how do you figure out wiring for a surplus motor.

>

No, it is a LOT more complicated.  Usually the motors are 3-phase,

permanent magnet, but there can be other types.

It is common to have Hall sensors for commutation, but not all motors

have these sensors.  There are several schemes

for orienting these sensors to the motor poles.  The motors typically

have 8 poles, but some may have other pole counts.

Encoders have all sorts of combinations available, some have the

commutation tracks and some don't, etc.  If the encoder has

the commutation signals, then the alignment of the encoder to the

motor's poles is critical.  Also, some motors, such as Yaskawa,

Panasonic and Fanuc often have something proprietary about the

commutation or encoder signals.



So, not only is the connector totally NOT standard, the signals

themselves vary quite a bit.



Jon

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@...> wrote:

>

> cnc_4_me wrote:

> > Do AC servo motors all have same pinout on them for wiring as in universial

connector.  If not, how do you figure out wiring for a surplus motor.

> >

> No, it is a LOT more complicated.  Usually the motors are 3-phase,

> permanent magnet, but there can be other types.

> It is common to have Hall sensors for commutation, but not all motors

> have these sensors.  There are several schemes

> for orienting these sensors to the motor poles.  The motors typically

> have 8 poles, but some may have other pole counts.

> Encoders have all sorts of combinations available, some have the

> commutation tracks and some don't, etc.  If the encoder has

> the commutation signals, then the alignment of the encoder to the

> motor's poles is critical.  Also, some motors, such as Yaskawa,

> Panasonic and Fanuc often have something proprietary about the

> commutation or encoder signals.

>

> So, not only is the connector totally NOT standard, the signals

> themselves vary quite a bit.

>

> Jon

>





You sure know how to depress a man.  So much for undocumented Ebay motors.



http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220385535101&ssPageName=STRK:\

MEWAX:IT



These are the ones i wanted to get.  But i can not find word one on them.



cnc4me

While they are inexpensive, you can probably do better in terms of

usability.  I'd look for a name brand servo that has easily available

documentation.



On Thu, Jun 17, 2010 at 14:42, cnc_4_me <cnc4me@...> wrote:



>

>

>

>

> --- In CAD_CAM_EDM_DRO@yahoogroups.com <CAD_CAM_EDM_DRO%40yahoogroups.com>,

> Jon Elson <elson@...> wrote:

> >

> > cnc_4_me wrote:

> > > Do AC servo motors all have same pinout on them for wiring as in

> universial connector. If not, how do you figure out wiring for a surplus

> motor.

> > >

> > No, it is a LOT more complicated. Usually the motors are 3-phase,

> > permanent magnet, but there can be other types.

> > It is common to have Hall sensors for commutation, but not all motors

> > have these sensors. There are several schemes

> > for orienting these sensors to the motor poles. The motors typically

> > have 8 poles, but some may have other pole counts.

> > Encoders have all sorts of combinations available, some have the

> > commutation tracks and some don't, etc. If the encoder has

> > the commutation signals, then the alignment of the encoder to the

> > motor's poles is critical. Also, some motors, such as Yaskawa,

> > Panasonic and Fanuc often have something proprietary about the

> > commutation or encoder signals.

> >

> > So, not only is the connector totally NOT standard, the signals

> > themselves vary quite a bit.

> >

> > Jon

> >

>

> You sure know how to depress a man. So much for undocumented Ebay motors.

>

>

>

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220385535101&ssPageName=STRK:\

MEWAX:IT

>

> These are the ones i wanted to get. But i can not find word one on them.

>

> cnc4me

>

>

>





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

cnc_4_me wrote:

> You sure know how to depress a man.  So much for undocumented Ebay motors.

>

>

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220385535101&ssPageName=STRK:\

MEWAX:IT

>

> These are the ones i wanted to get.  But i can not find word one on them.

>

>

Well, sorry, but AC servos are a lot more complicated, and a lot less

standard than brush motors.

I have figured out how to make several makes run, but it is not easy.

Now you know WHY these motors are

going for $39, because nobody has the necessary docs to use them.



Jon

If anyone uses Chris Radek's truetype-tracer program I have written a

small utility which allows you to specify the length of the string

generated in the .dxf engraving file. It's avalable for download at:

http://co-japan.com/metalworking

the latest version tttscale-002.c though marked as the development

version is now ready for prime time.



Cheers,



Mark

I was pleasantly surprised by the number of people who have downloaded

tttscale, hopefully it has proven useful. I decided to do a bit more

work on it and have now added the option to produce either a .dxf file,

or generate a gcode file directly.



This of course necessitated adding a number of additional options for:



final depth

cut increment

surface

safe z

feed rate



This is in addition to the original flags for setting the x and y offset

as well as the scale factor based on the requested x length.



Currently the gcode produced is very straight forward, in the next

version I will include code loops to reduce the overall size of the

gcode file. A word on the file size generated, if you specify a small

cut increment and a large final depth as well as a long string of a few

dozen characters, the file will become quite massive. For now I don't

see this as a major problem as normally in engraving only a few passes

are required. I am sure that someone will want to test the limits, so if

you enter something like:



truetype-tracer-dxf -f /usr/share/fonts/truetype/somefontname.ttf "Now

is the time for all good men to come to the aide of the party" |

tttscale -s -l250 -d 6 -c 0.01 -u 0.00 -r 3.0 -f400 > bigfile.ngc



You will have a file that will probably overload emc2! Why you would

want to do this is beyond me as the result would be making 600 passes of

the text!



Hope this utility is useful to some of you.



It's at http://co-japan.com/metalworking and listed as the development

version.











Mark Thomas wrote:

>

> If anyone uses Chris Radek's truetype-tracer program I have written a

> small utility which allows you to specify the length of the string

> generated in the .dxf engraving file. It's avalable for download at:

> http://co-japan.com/metalworking

> the latest version tttscale-002.c though marked as the development

> version is now ready for prime time.

>

> Cheers,

>

> Mark

>

>