On 14 April 2012 22:45, Kirk Wallace wrote:
> A 660 Ohm
> resistor pulled the ramp up higher, but 5V / 660 Ohms = 7.5 mA and is
> starting to get into an amp range that could get interesting for pin 16.
I thought that nearly all p-ports can _sink_ 15mA per pin?
http://www.asix.com.tw/FrootAttach
Try using 'benf's firmware, checkout
http://www.seeedstudio.com/forum/viewforum.php?f=12 or just search around
the interwebz for 'benf firmware'.
Much improved. And I believe it includes the 'small signals' capture mode
which is one of the things the quad;s community firmware does - makes the
buf
I set up Dan's G540 today and used it with three different ports. A
motherboard port which worked okay, but showed a bit of a saw toothed
wave form, so it seems the G540 pump input draws a fair amount of
capacitive load compared to the pin 16 output source capability.
I then used a Rosewill dual
On Saturday, April 14, 2012 04:29:31 PM gene heskett did opine:
> 1. It looks like it might work as is, provided I can figure out how to
> set it up to make a measurement.
> 2. It says in the mimeographed at fax resolution docs that come with it,
> on page 6 which describes how to update the fir
1. It looks like it might work as is, provided I can figure out how to set
it up to make a measurement.
2. It says in the mimeographed at fax resolution docs that come with it, on
page 6 which describes how to update the firmware, and which I assume
needs a windows box, and no cd accompanies i
On 14 Apr 2012, at 14:31, Gabriel Willen wrote:
> ttp://www.wemotec.net/products/controller-modules/WT-SC25-Servocontroller.html
> does
> anyone know anything about this?
On paper it sounds like a good fit for LinuxCNC, but I always get nervous when
the product picture is a 3D model.
---
On 14 Apr 2012, at 14:41, Erik Friesen wrote:
> #2 ? I am not familiar with any drive using this idea. It would require
> current sensors on each leg. I guess there is no new thing under the sun.
I may have misunderstood. The bldc component can "wiggle" a motor to determine
the relationshi
>>I suspect the reason is I was just fiddling with the cards and it's
>>connectors who sometimes
may cause you trouble as I'm sure most of you know.
<<
Ahhh.. old controls I know of a another lathe that does this..
intermittently stops during a run for no apparent reason.. sometimes simply
14 квітня 2012 р. 16:31 Gabriel Willen написав:
>
> http://www.wemotec.net/products/controller-modules/WT-SC25-Servocontroller.html
> does
> anyone know anything about this?
>
> Interesting. Do you know the price?
Andrew
---
#2 ? I am not familiar with any drive using this idea. It would require
current sensors on each leg. I guess there is no new thing under the sun.
On Sat, Apr 14, 2012 at 9:12 AM, Andy Pugh wrote:
>
>
> On 14 Apr 2012, at 13:38, Erik Friesen wrote:
>
> >
> > #1 Use more hall sensors and a si
http://www.wemotec.net/products/controller-modules/WT-SC25-Servocontroller.html
does
anyone know anything about this?
Thanks
Gabe
--
For Developers, A Lot Can Happen In A Second.
Boundary is the first to Know...and Tell Yo
On 14 Apr 2012, at 13:38, Erik Friesen wrote:
>
> #1 Use more hall sensors and a sine lookup table.
>
> #2 Use hall sensors + angle sensing by current pulsing/reading.
>
> #3 Sync the halls with the encoder some way. (not a good option in my
> books)
With a suitable drive the LinuxCNC "b
I think it will take a custom sine drive. I think microchip's bldc demo
board would possibly drive that motor. A few ideas -
#1 Use more hall sensors and a sine lookup table.
#2 Use hall sensors + angle sensing by current pulsing/reading.
#3 Sync the halls with the encoder some way. (not a
The Storebro project is proceeding.
Some measurements wil soon be presented on my site because they are part of low
level motor control and should therefore be of general interest for the group.
The related electronics drawings are there already.
The machine magically started to function again du
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