sample of data.
-- Ralph
From: Viesturs Lācis [viesturs.la...@gmail.com]
Sent: Friday, July 06, 2012 12:31 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] linear motor tuning questions
2012/7/6 Ralph Stirling :
> I'm looking forw
2012/7/6 Ralph Stirling :
> I'm looking forward to answers to those questions myself :-).
> Theoretically the AS5311 encoders have 2um resolution. I am
> going to be doing some repeatability testing tomorrow with an
> LVDT to try to verify the encoder performance. Force measurement
> is a little
On Thu, 5 Jul 2012, Jon Elson wrote:
> Date: Thu, 05 Jul 2012 22:17:04 -0500
> From: Jon Elson
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] linear motor tuning questions
>
&
Ralph Stirling wrote:
> That did it! D=0.12 gives me much smoother f-error at
> higher accelerations. I had always assumed that derivative
> term would make oscillations worse, so didn't play with it
> much. At D=0.14 new oscillations appear, but at D=0.08 to
> 0.12 the 10Hz resonance disappears
Ralph Stirling wrote:
> I have my prototype linear motor running now, but I'm
> observing a rather severe resonance under higher
> accelerations. This oscillation is about 10Hz, and
> generates following errors if I don't have wide limits
> on f-error. I've attached a halscope plot illustrating
>
-- Ralph
From: Greg Bernard [yankeelena2...@yahoo.com]
Sent: Thursday, July 05, 2012 6:59 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] linear motor tuning questions
Wow! That is really cool, Ralph! I would love to hear more details about your
n out before we tackle that. -Thomas Edison, inventor (1847-1931)
>
> From: Ralph Stirling
>To: Enhanced Machine Controller (EMC)
>Sent: Thursday, July 5, 2012 11:21 AM
>Subject: [Emc-users] linear motor tuning questions
>
>I have my prototy
On Thu, 5 Jul 2012, Ralph Stirling wrote:
> Date: Thu, 5 Jul 2012 17:39:41 +
> From: Ralph Stirling
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] linear motor tuning questi
On 5 July 2012 17:21, Ralph Stirling wrote:
> Right now I have my pid parameters set pretty
> basic:
>
> P = 5.0
> I = 0.0
> D = 0.0
A little bit of D might kill the resonance.
--
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto
---
