On 1 November 2010 05:13, Jon Elson wrote:
> One quirk, which I think is inherent in the way that HAL component
> encoder.c works,
> and which I copied,
> is that a dithering encoder gets the wrong velocity. The first count of
> the dither gets
> the right velocity, as there was no movement for
Bugs item #3092250, was opened at 2010-10-21 19:31
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On Mon, 1 Nov 2010, Jon Elson wrote:
> Date: Mon, 01 Nov 2010 00:13:36 -0500
> From: Jon Elson
> Reply-To: EMC developers
> To: EMC developers
> Subject: Re: [Emc-developers] pid with derivative inputs
>
> Well, after an AMAZING amount of fooling around with barely one page of
> code, I finall
Bugs item #2136805, was opened at 2008-09-29 22:57
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Bugs item #2136805, was opened at 2008-09-29 15:57
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Andy Pugh wrote:
> This sounds like a problem related to the one I am having with my
> resolver converter, and one possible solution would be a tracking
> filter (
There was a chip made by ST, the L290, a quadrature to voltage converter.
It decoded the quadrature into + and - moves, and then had tw
Peter C. Wallace wrote:
>
>
> One good sanity check on the velocity output is to setup your hardware step
> generator for quadrature mode and set a constant velocity but randomly
> changing directions(and ~infinite acceleration). Another good test is just a
> slow velocity ramp. The advantage is
On Mon, Nov 01, 2010 at 12:13:36AM -0500, Jon Elson wrote:
> One quirk, which I think is inherent in the way that HAL component
> encoder.c works,
> and which I copied,
> is that a dithering encoder gets the wrong velocity.
When Seb K was working on the hostmot2 driver, one of the kinds of
wro
On Mon, 1 Nov 2010, Jon Elson wrote:
> Date: Mon, 01 Nov 2010 11:18:06 -0500
> From: Jon Elson
> Reply-To: EMC developers
> To: EMC developers
> Subject: Re: [Emc-developers] pid with derivative inputs
>
> Peter C. Wallace wrote:
>>
>>
>> One good sanity check on the velocity output is to setu
thank you very much.
Da: Kirk Wallace
A: EMC developers
Inviato: Dom 31 ottobre 2010, 19:08:48
Oggetto: Re: [Emc-developers] (no subject)
On Sun, 2010-10-31 at 16:33 +, cristian pisoni wrote:
> hi,
> i'm going to build a cnc with my friends, i need to cre
i'm going to use stepper and i want to build a H-bridge to control them but i
dont know which signal i have to modify.
Da: Andy Pugh
A: EMC developers
Inviato: Dom 31 ottobre 2010, 18:45:26
Oggetto: Re: [Emc-developers] (no subject)
On 31 October 2010 16:33,
I'm terribly sorry to hijack this old thread, but as some process (not shown
among processes, huh?) froze and took 100% of one core (and sometimes
skipped from one core to another), I got really weird results on my Phenom
II X6 1055T running at 4GHz. (4GB 1780DDR3, 334MHz HTT)
Notably, the overall
Chris Radek wrote:
> On Mon, Nov 01, 2010 at 12:13:36AM -0500, Jon Elson wrote:
>
>
>> One quirk, which I think is inherent in the way that HAL component
>> encoder.c works,
>> and which I copied,
>> is that a dithering encoder gets the wrong velocity.
>>
>
> When Seb K was working on th
Peter C. Wallace wrote:
> Sure, ultimately you want to test with real world signals but when debugging
> its good to reduce the number of variables or at least have good control of
> them...
>
I added a number of internal variables to the exported pins so I could
Halscope them,
this made deci
On 11/01/2010 09:54 PM, Jon Elson wrote:
> Chris Radek wrote:
>>I think Seb started with that code and improved it
>> to get the good results we have from hostmot2 now. You might want to
>> browse the git history to see what he did?
>>
>> The changes 84e73cbd534 and especially fed9d8e5a58 look
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