[Emc-users] Need MESA 5i25 + 7i77 in EU quickly

[propcoder]

 Does somebody have spare kit in EU? Need it in Lithuania.


--
See everything from the browser to the database with AppDynamics
Get end-to-end visibility with application monitoring from AppDynamics
Isolate bottlenecks and diagnose root cause in seconds.
Start your free trial of AppDynamics Pro today!
http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Stupid LinuxCNC Tricks

[Viesturs Lācis]

2013/7/10 Charles Steinkuehler 

> On 7/10/2013 3:19 PM, Eric Keller wrote:
> > On Wed, Jul 10, 2013 at 3:45 PM, Eric Keller  wrote:
> >
> >>> has kins here
> >>>
> >>> http://kvarc.extra.hu/step/motor/emc/emckinematics.html
> >>>
> >>> sam
> >>
> >> That's not a linear delta robot.  A linear delta robot uses linear
> actuators.
> >
> > Anyway, no license on the code and copyright notice.  Maybe I should
> > just write the kins.
>
> Please do!
>
> ...that way I won't have to!  :)
>

Hg5bsd, a person that has built several delta robots, was very kind to
share his kinematics module of this linear delta robot:
https://www.youtube.com/watch?v=FgnxBaFFDi8

He also was very kind to agree on "GPL2 or later" licence statement.

I put the file on my website:
http://www.cutting.lv/fileadmin/user_upload/lindeltakins.c

He also provided a little sketch that explains all those Ax, Bx, Cx, Cy
parameters. I had difficulties to understand them at first moment, so the
sketch was helpful at least for me:
http://www.cutting.lv/fileadmin/user_upload/lindeltascheme1.jpg

It seems to me that this module assumes joint rod length to be equal to
distance between joints.
I would appreciate, if anyone could test it.

-- 
Viesturs

If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto
--
See everything from the browser to the database with AppDynamics
Get end-to-end visibility with application monitoring from AppDynamics
Isolate bottlenecks and diagnose root cause in seconds.
Start your free trial of AppDynamics Pro today!
http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

[Emc-users] Servo bearing

[Terry Christophersen]

Hi,
  I have a SEM servo motor that has a bad bearing(pulley side). I usually send
in all motor problems to a motor repair shop and $500.00 later Im back in 
business.
This is a spare so Im not going to have any machine down time but I cant
see paying 500 for a 10.00 dollar bearing.
Someone told me that when you dissassemble/assemble you cant let the arm
touch the magnets.Is that true? If that is true then motor shops must have
some kind of fixture. Anybody have replaced a bearing themselves?

Thanks

Terry Christophersen


--
See everything from the browser to the database with AppDynamics
Get end-to-end visibility with application monitoring from AppDynamics
Isolate bottlenecks and diagnose root cause in seconds.
Start your free trial of AppDynamics Pro today!
http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo bearing

[andy pugh]

On 14 July 2013 01:00, Terry Christophersen  wrote:

> Someone told me that when you dissassemble/assemble you cant let the arm
> touch the magnets.Is that true?

I have also heard that removing the rotor from the stator will
demagnetise it, but I have allowed both to happen replacing the
bearings on my servos and they still work.

You might find that the mill itself makes a good jig for removing the
rotor without touching the stator. Hold the shaft in a collet, clamp
the body to the table, and raise the head...


-- 
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

--
See everything from the browser to the database with AppDynamics
Get end-to-end visibility with application monitoring from AppDynamics
Isolate bottlenecks and diagnose root cause in seconds.
Start your free trial of AppDynamics Pro today!
http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo bearing

[Terry Christophersen]

Thanks Andy. I will give that mill method a try.
I will bet that the rumor was started by a motor repair shop.:)


Thanks
Terry


- Original Message -
From: andy pugh 
To: Terry Christophersen ; Enhanced Machine Controller 
(EMC) 
Cc: 
Sent: Saturday, July 13, 2013 7:18 PM
Subject: Re: [Emc-users] Servo bearing

On 14 July 2013 01:00, Terry Christophersen  wrote:

> Someone told me that when you dissassemble/assemble you cant let the arm
> touch the magnets.Is that true?

I have also heard that removing the rotor from the stator will
demagnetise it, but I have allowed both to happen replacing the
bearings on my servos and they still work.

You might find that the mill itself makes a good jig for removing the
rotor without touching the stator. Hold the shaft in a collet, clamp
the body to the table, and raise the head...


-- 
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto


--
See everything from the browser to the database with AppDynamics
Get end-to-end visibility with application monitoring from AppDynamics
Isolate bottlenecks and diagnose root cause in seconds.
Start your free trial of AppDynamics Pro today!
http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo bearing

[Jon Elson]

Terry Christophersen wrote:
> Hi,
>   I have a SEM servo motor that has a bad bearing(pulley side). I usually send
> in all motor problems to a motor repair shop and $500.00 later Im back in 
> business.
> This is a spare so Im not going to have any machine down time but I cant
> see paying 500 for a 10.00 dollar bearing.
> Someone told me that when you dissassemble/assemble you cant let the arm
> touch the magnets.Is that true? If that is true then motor shops must have
> some kind of fixture. Anybody have replaced a bearing themselves?
>   
It is preferable if you can keep it aligned so the magnets don't get 
chipped.
But, I strongly suspect your motor shop doesn't have some fantastic
fixture to do this, either!  In general, you can remove bolts that hold
the end covers to the stator housing and use a puller to pull the end
cover off with the bearing.  Then, push the cover back and the bearing
will be left exposed on the shaft.  Pull and replace the bearing,
and reassemble.  If you are gentle with it, you can probably avoid
much chipping of the magnets, and the motor should be fine.

It may be important to remove the encoder before any disassembly
of the motor, depending on how it is put together.

Jon

--
See everything from the browser to the database with AppDynamics
Get end-to-end visibility with application monitoring from AppDynamics
Isolate bottlenecks and diagnose root cause in seconds.
Start your free trial of AppDynamics Pro today!
http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo bearing

[andy pugh]

On 14 July 2013 01:30, Terry Christophersen  wrote:
> Thanks Andy. I will give that mill method a try.
> I will bet that the rumor was started by a motor repair shop.:)

I think it was probably the case with the earlier metallic magnets,
which were (I believe) magnetised in-situ with the armature acting as
a keeper.
The remanence of rare-earth magnets may have changed the rules.

-- 
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

--
See everything from the browser to the database with AppDynamics
Get end-to-end visibility with application monitoring from AppDynamics
Isolate bottlenecks and diagnose root cause in seconds.
Start your free trial of AppDynamics Pro today!
http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo bearing

[john mcintyre]

From: johnan...@live.com.au
To: tcninj...@yahoo.com
Subject: RE: [Emc-users] Servo bearing
Date: Sun, 14 Jul 2013 11:40:06 +1030




Good Day, All
I believe on the early permanent magnets used in steam trains and car magneto 
the magnets would lose some of theremagnetism when dismantled . As we always 
had to remagnetise  the magneto when fully assembled  after dismantling them 
.It now appears that the new magnetic material used in motors, can be 
dismantled and repaired with out remagnetising.
Cheers john

> Date: Sat, 13 Jul 2013 17:30:01 -0700
> From: tcninj...@yahoo.com
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Servo bearing
> 
> Thanks Andy. I will give that mill method a try.
> I will bet that the rumor was started by a motor repair shop.:)
> 
> 
> Thanks
> Terry
> 
> 
> - Original Message -
> From: andy pugh 
> To: Terry Christophersen ; Enhanced Machine Controller 
> (EMC) 
> Cc: 
> Sent: Saturday, July 13, 2013 7:18 PM
> Subject: Re: [Emc-users] Servo bearing
> 
> On 14 July 2013 01:00, Terry Christophersen  wrote:
> 
> > Someone told me that when you dissassemble/assemble you cant let the arm
> > touch the magnets.Is that true?
> 
> I have also heard that removing the rotor from the stator will
> demagnetise it, but I have allowed both to happen replacing the
> bearings on my servos and they still work.
> 
> You might find that the mill itself makes a good jig for removing the
> rotor without touching the stator. Hold the shaft in a collet, clamp
> the body to the table, and raise the head...
> 
> 
> -- 
> atp
> If you can't fix it, you don't own it.
> http://www.ifixit.com/Manifesto
> 
> 
> --
> See everything from the browser to the database with AppDynamics
> Get end-to-end visibility with application monitoring from AppDynamics
> Isolate bottlenecks and diagnose root cause in seconds.
> Start your free trial of AppDynamics Pro today!
> http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users

  
--
See everything from the browser to the database with AppDynamics
Get end-to-end visibility with application monitoring from AppDynamics
Isolate bottlenecks and diagnose root cause in seconds.
Start your free trial of AppDynamics Pro today!
http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Servo bearing

[Gene Heskett]

On Saturday 13 July 2013 21:15:37 Terry Christophersen did opine:

> Hi,
>   I have a SEM servo motor that has a bad bearing(pulley side). I
> usually send in all motor problems to a motor repair shop and $500.00
> later Im back in business. This is a spare so Im not going to have any
> machine down time but I cant see paying 500 for a 10.00 dollar bearing.
> Someone told me that when you dissassemble/assemble you cant let the arm
> touch the magnets.Is that true? If that is true then motor shops must
> have some kind of fixture. Anybody have replaced a bearing themselves?
> 
> Thanks
> 
> Terry Christophersen

My guess is that you must remove the end bell and the bad bearing without 
taking the armature out of the field.  If when you take out the bolts, and 
pull the end bell by pushing on the motor shaft, the bearing will either 
stay in the end bell, or on the shaft.  From there it should be obvious how 
to replace the bearing as long as the armature is not withdrawn from the 
field.  Once the end bell and fresh bearing are put back together, don't 
forget to exercise it liberally with a dead blow hammer in order to 
properly reseat the bearing.  I don't know, and cannot imagine why the 
armature can't be allowed to touch the magnets as long as its not spun when 
its touching, which could cut through the varnish on the laminations, 
possibly creating inter-laminate shorts which would then cause more 
localized heat from eddy currant losses in the motor.  Perhaps one could 
find some thin, fairly hard plastic that could be cut into strips and 
inserted from the far end bell, if it has vent holes, (rare in my 
experience) which would then serve as cushions to prevent the contact.  I'd 
have to play it by ear on that. 

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)
My web page:  is up!
My views 

Hitchcock's Staple Principle:
The stapler runs out of staples only while you are trying to
staple something.
A pen in the hand of this president is far more
dangerous than 200 million guns in the hands of
 law-abiding citizens.

--
See everything from the browser to the database with AppDynamics
Get end-to-end visibility with application monitoring from AppDynamics
Isolate bottlenecks and diagnose root cause in seconds.
Start your free trial of AppDynamics Pro today!
http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

[Emc-users] Servo Bearing

[Terry Christophersen]

Hi all,
  I removed the encoder and brushes then mounted a old lathe chuck on the bed
of my VMC(I needed 20+inches of Z) put the shaft in a collet and clamped the
chuck on the motor can. Worked like a champ. Thanks to all for the help.
Maybe I should go into the servo repair business.:)


Terry

--
See everything from the browser to the database with AppDynamics
Get end-to-end visibility with application monitoring from AppDynamics
Isolate bottlenecks and diagnose root cause in seconds.
Start your free trial of AppDynamics Pro today!
http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users