On 27 May 2012 05:16, Jeshua Lacock jes...@3dtopo.com wrote:
The drive is dithering at 0.0003 - 0.0006 with the worst spike now at 0.0012.
...
One encoder pulse is 0.0003 on this axis. Would tuning the PID help with the
spikes
You could consider setting the PID deadband to 1 or 2 encoder
In preparation for any work I thought, we need to get a call tree or flow chart.
A bit of googling and I found f77_diagram.
A bit of hacking and I have it outputting html with links to other
html including links to
the flow charts.
That is a bit of a difficult configuration. I rather like to us
encoders with a RS485 balanced pair output i.e. A, notA, B, notB, etc.
The receivers reject noise much better in htat configuration.
You might try to find a powder iron or ceramic ring-core and loop all
encoder wires through a few
On 5/27/2012 9:34 AM, Dave Caroline wrote:
In preparation for any work I thought, we need to get a call tree or flow
chart.
A bit of googling and I found f77_diagram.
A bit of hacking and I have it outputting html with links to other
html including links to
the flow charts.
On 5/27/2012 12:59 PM, John Thornton wrote:
I did manage to get two traces last night with a kick start from your
instructions and lots of help from the IRC. At the end I figured out the
two circuits I was monitoring was the same phase. I do feel that I can
get a good trace now thanks to all
On 27 May 2012 17:59, John Thornton bjt...@gmail.com wrote:
I did manage to get two traces last night with a kick start from your
instructions and lots of help from the IRC
One thing that occurred to me is that phase balance on the drive-side
of the reactor is possibly more important than
On Sat, 2012-05-26 at 22:16 -0600, Jeshua Lacock wrote:
... snip
You can sort-of see that I did that with my power and step/dir lines
in this cabinet:
https://picasaweb.google.com/lh/photo/NivmHU8OuXIcP2EQHUPruNMTjNZETYmyPJy0liipFm0?feat=directlink
... snip
Your cabinet looks a lot better
On 27 May 2012 18:48, Kirk Wallace kwall...@wallacecompany.com wrote:
https://picasaweb.google.com/lh/photo/NivmHU8OuXIcP2EQHUPruNMTjNZETYmyPJy0liipFm0?feat=directlink
Your cabinet looks a lot better than mine, but... I have a thing about
Zip-ties.
Zip ties! How very dare you! That's
Zip ties! How very dare you! That's harness lacing, that is.
Oh dear, did you catch that affliction in your seafaring days, did you,
Andy?
j.
On Sun, May 27, 2012 at 8:07 PM, andy pugh bodge...@gmail.com wrote:
On 27 May 2012 18:48, Kirk Wallace kwall...@wallacecompany.com wrote:
On Sunday, May 27, 2012 03:40:41 PM Jon Elson did opine:
Jeshua Lacock wrote:
Then, just to see what might happen, I cut the encoder ground
connected to the encoder shield, and it looks like (preliminary
speaking) it no longer faults out.
This seems to indicate that the encoder shield
On Sunday, May 27, 2012 04:06:25 PM andy pugh did opine:
On 27 May 2012 18:48, Kirk Wallace kwall...@wallacecompany.com wrote:
https://picasaweb.google.com/lh/photo/NivmHU8OuXIcP2EQHUPruNMTjNZET
YmyPJy0liipFm0?feat=directlink
Your cabinet looks a lot better than mine, but... I have a
Here is an article about effective EMI screening for those interested in
the subject.
http://www.ce-mag.com/99ARG/Bjorklof137.html
j.
On Sun, May 27, 2012 at 10:09 PM, gene heskett ghesk...@wdtv.com wrote:
On Sunday, May 27, 2012 04:06:25 PM andy pugh did opine:
On 27 May 2012 18:48,
On May 27, 2012, at 5:30 AM, andy pugh wrote:
On 27 May 2012 05:16, Jeshua Lacock jes...@3dtopo.com wrote:
The drive is dithering at 0.0003 - 0.0006 with the worst spike now at 0.0012.
...
One encoder pulse is 0.0003 on this axis. Would tuning the PID help with the
spikes
You could
On May 27, 2012, at 10:12 AM, Jon Elson wrote:
Jeshua Lacock wrote:
Then, just to see what might happen, I cut the encoder ground connected to
the encoder shield, and it looks like (preliminary speaking) it no longer
faults out.
This seems to indicate that the encoder shield was
On May 27, 2012, at 11:21 AM, Kirk Wallace wrote:
On Sat, 2012-05-26 at 23:31 -0500, Jon Elson wrote:
... snip
Jeshua's AMT-103 encoder has a 2 mA source/sink driver when used by
itself (without
the line driver cable option). So, you can't apply too much of a
pull-down or it will
alter
Kirk Wallace wrote:
This is getting messy. I made a first attempt at a schematic of a single
encoder setup. It should be attached. Also, the Inkscape SVG file is
attached if someone wants to edit it. There are some missing bits, such
as, how each component gets powered and grounded. I assumed
gene heskett wrote:
Jon, while the encoder I built for the lathe spindle was pretty crude, one
of the things I did in my research was to make it an given that the opto
device chosen had an active, high speed CMOS rail to rail output. While
the qradrature may not have been accurate enough
Jeshua Lacock wrote:
I captured a big spike event (16 encoder counts!), but for the life of me, I
cannot figure which came first (the seem to be at the same instant?). I have
two screen captures online, 1 so you can see the whole event and the second
zoomed in as far as possible at the
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