Re: [Emc-developers] Absolute resolvers

2018-07-05 Thread andy pugh
On 5 July 2018 at 20:28, Peter C. Wallace  wrote:

> This should also work for any 1 turn absolute encoder (like the common Hall
> effect encoders from AMS etc)

It should, but the drivers need to be modified to support it. And I
don't have any to test it with.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers


Re: [Emc-developers] Absolute resolvers

2018-07-05 Thread Peter C. Wallace

On Thu, 5 Jul 2018, andy pugh wrote:


Date: Thu, 5 Jul 2018 20:18:37 +0100
From: andy pugh 
Reply-To: EMC developers 
To: EMC developers 
Subject: [Emc-developers] Absolute resolvers

Using the position.txt file and a tweak to the Mesa resolver driver I
have had good results making my lathe work as if it has absolute
encoders.

Does anyone have any opinions about whether I should, or should not, push it?

Naturally it would need docs, but you basically just need to connect
joint-pos-fb to the resolver module so that it can see the value read
in from the position.txt file and set a bit parameter to say "wait for
that value"

https://github.com/LinuxCNC/linuxcnc/commit/0ece124eb52ad6b723db326543714af66ed1930a



This should also work for any 1 turn absolute encoder (like the common Hall 
effect encoders from AMS etc)



--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
?? George Fitch, Atlanta Constitution Newspaper, 1916

--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers

Peter Wallace
Mesa Electronics

(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.
--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot___
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers


[Emc-developers] Absolute resolvers

2018-07-05 Thread andy pugh
Using the position.txt file and a tweak to the Mesa resolver driver I
have had good results making my lathe work as if it has absolute
encoders.

Does anyone have any opinions about whether I should, or should not, push it?

Naturally it would need docs, but you basically just need to connect
joint-pos-fb to the resolver module so that it can see the value read
in from the position.txt file and set a bit parameter to say "wait for
that value"

https://github.com/LinuxCNC/linuxcnc/commit/0ece124eb52ad6b723db326543714af66ed1930a

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers