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From: emc-users-requ...@lists.sourceforge.net
Date: Fri, 30 Sep 2011 23:52:46
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Subject: Emc-users Digest, Vol 65, Issue 77
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Today's Topics:
1. Re: 3-phase pwmgens for 7i39 (andy pugh)
2. OT: drilling square holes (Roland Jollivet)
3. Re: OT: drilling square holes (andy pugh)
4. Re: OT: drilling square holes (Viesturs L?cis)
5. Re: 3-phase pwmgens for 7i39 (Viesturs L?cis)
6. Re: 3-phase pwmgens for 7i39 (andy pugh)
7. BLDC Component With Induction Motor? (Kirk Wallace)
----------------------------------------------------------------------
Message: 1
Date: Fri, 30 Sep 2011 19:51:57 +0100
From: andy pugh <bodge...@gmail.com>
Subject: Re: [Emc-users] 3-phase pwmgens for 7i39
To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
Message-ID:
<CAN1+YZUsR=qKF+4C0mZChsxEPcP-sw-6kZJaKL7J8A6-WcL=h...@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
On 30 September 2011 19:41, Viesturs L?cis <viesturs.la...@gmail.com> wrote:
> Is there any chance that I have to set something that is not 8? That
> Keling's spreadsheet says that motor has 8 poles.
With the motor in 0 mode and frequency 0 with low current you should
be able to turn the motor by hand and feel the poles.
(Actually, the docs say to use "n" not "0" for dumb-mode., so cfg=n,n,n)
4 notches = 8 poles.
>
>> Also, there is a 50% chance that the bldc.N.scale needs to be a
>> negative number.
>
> Does not work with or without "-" sign in front of the scale value.
It could still be the wrong Hall pattern then. You say that 4 of them worked?
It uses which transition it is to infer the angle, if the transition
sequence isn't quite right, then it won't work.
You could try qhi, it is probable that the encoder index is at motor zero.
--
atp
"Torque wrenches are for the obedience of fools and the guidance of wise men"
------------------------------
Message: 2
Date: Fri, 30 Sep 2011 21:02:39 +0200
From: Roland Jollivet <roland.jolli...@gmail.com>
Subject: [Emc-users] OT: drilling square holes
To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
Message-ID:
<caktodyjk07uxt4kwsl3ubcb7kevk89esuiogpt+ek_j3nb8...@mail.gmail.com>
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Thought this may be of interest..
http://www.youtube.com/watch?v=d9wfgpqs2dE
------------------------------
Message: 3
Date: Fri, 30 Sep 2011 20:14:34 +0100
From: andy pugh <bodge...@gmail.com>
Subject: Re: [Emc-users] OT: drilling square holes
To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
Message-ID:
<CAN1+YZVEzoAs2QXNZdN8zyN-DeJxMsWdX8BdgnEJ6-mV+4h=k...@mail.gmail.com>
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On 30 September 2011 20:02, Roland Jollivet <roland.jolli...@gmail.com> wrote:
> Thought this may be of interest..
>
> http://www.youtube.com/watch?v=d9wfgpqs2dE
You can do that in EMC2 without special tools:
http://www.youtube.com/watch?v=T4q8gCpeY1A
--
atp
"Torque wrenches are for the obedience of fools and the guidance of wise men"
------------------------------
Message: 4
Date: Fri, 30 Sep 2011 22:15:28 +0300
From: Viesturs L?cis <viesturs.la...@gmail.com>
Subject: Re: [Emc-users] OT: drilling square holes
To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
Message-ID:
<cakney+fesgvg59k5eed2d9w4zuwvkcdg2gvepgq93fmcpbu...@mail.gmail.com>
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Thanks for sharing!
I doubt that I would have imagined something like that...
Viesturs
2011/9/30 Roland Jollivet <roland.jolli...@gmail.com>:
> Thought this may be of interest..
>
> http://www.youtube.com/watch?v=d9wfgpqs2dE
> ------------------------------------------------------------------------------
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> http://p.sf.net/sfu/splunk-d2dcopy2
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------------------------------
Message: 5
Date: Fri, 30 Sep 2011 22:29:24 +0300
From: Viesturs L?cis <viesturs.la...@gmail.com>
Subject: Re: [Emc-users] 3-phase pwmgens for 7i39
To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
Message-ID:
<cakney+dakitv-zy6-zvjdwzcexs0j3c8fvu5u5fpgj-zkeb...@mail.gmail.com>
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2011/9/30 andy pugh <bodge...@gmail.com>:
> On 30 September 2011 19:41, Viesturs L?cis <viesturs.la...@gmail.com> wrote:
>
>> Is there any chance that I have to set something that is not 8? That
>> Keling's spreadsheet says that motor has 8 poles.
>
> With the motor in 0 mode and frequency 0 with low current you should
> be able to turn the motor by hand and feel the poles.
> (Actually, the docs say to use "n" not "0" for dumb-mode., so cfg=n,n,n)
> 4 notches = 8 poles.
>>
>>> Also, there is a 50% chance that the bldc.N.scale needs to be a
>>> negative number.
>>
>> Does not work with or without "-" sign in front of the scale value.
>
> It could still be the wrong Hall pattern then. You say that 4 of them worked?
> It uses which transition it is to infer the angle, if the transition
> sequence isn't quite right, then it won't work.
>
> You could try qhi, it is probable that the encoder index is at motor zero.
Incredible!
I found 2 notches, so decided for 4 poles, added "minus" for scale and
motor now turns smoothly and silently also with cfg=qh,qh,qh
What should be my next step?
Installing motor in machine and trying to tune PID loop?
I tried assigning bldc.2.value to motor.2.pos-cmd and then tried to
jog it - it starts turning and does not stop until I press F2.
Viesturs
------------------------------
Message: 6
Date: Fri, 30 Sep 2011 20:59:39 +0100
From: andy pugh <bodge...@gmail.com>
Subject: Re: [Emc-users] 3-phase pwmgens for 7i39
To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
Message-ID:
<can1+yzvct3se4bjaj6jrnutemxw6tompuzjdh3okh3+8w9j...@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
On 30 September 2011 20:29, Viesturs L?cis <viesturs.la...@gmail.com> wrote:
> Incredible!
> I found 2 notches, so decided for 4 poles, added "minus" for scale and
> motor now turns smoothly and silently also with cfg=qh,qh,qh
And now you see why I decided to write that Wiki page on this subject,
and also why I haven't finished it. :-(
> What should be my next step?
> Installing motor in machine and trying to tune PID loop?
I would make a PID loop for the bare motor first. It won't be easy to
tune, but it will be a start.
> I tried assigning bldc.2.value to motor.2.pos-cmd and then tried to
> jog it - it starts turning and does not stop until I press F2.
It will, you are telling the motor to spin at X mm?
You need motor-pos-cmd to pid.command, encoder-position to
pid.feedback and pid.output to bldc.value
--
atp
"Torque wrenches are for the obedience of fools and the guidance of wise men"
------------------------------
Message: 7
Date: Fri, 30 Sep 2011 16:52:36 -0700
From: Kirk Wallace <kwall...@wallacecompany.com>
Subject: [Emc-users] BLDC Component With Induction Motor?
To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
Message-ID: <1317426756.1771.43.camel@910>
Content-Type: text/plain; charset="UTF-8"
Andy, have you tried your BLDC component on a three phase induction
motor, or in other words as an EMC2 based VFD?
--
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
http://www.wallacecompany.com/E45/index.html
California, USA
------------------------------
------------------------------------------------------------------------------
All of the data generated in your IT infrastructure is seriously valuable.
Why? It contains a definitive record of application performance, security
threats, fraudulent activity, and more. Splunk takes this data and makes
sense of it. IT sense. And common sense.
http://p.sf.net/sfu/splunk-d2dcopy2
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------------------------------------------------------------------------------
All of the data generated in your IT infrastructure is seriously valuable.
Why? It contains a definitive record of application performance, security
threats, fraudulent activity, and more. Splunk takes this data and makes
sense of it. IT sense. And common sense.
http://p.sf.net/sfu/splunk-d2dcopy2
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