While 10 RPM is pretty impressive mechanicalvise, it is only 1700 Hz on
a two-pole motor. A BLDC is similar to a syncronous three phase motor that
was used much for really high power apps in ancient times, maybe even today.
Typical example is a city water supply pump. They had to be brought up
100K / 60 * 2(poles) = electrical rpms. You'll need to run the pwm well
over 100Khz to do this. The lowly dspic33f mc motor series will struggle to
do this, let alone any additional processing.
I think there is something else though, it seems that a bldc has less
torque from a fixed frequency
Of course, if you use hall effect sensors it would be easier. Some folks
add hall effect sensors to outrunners, it works fine.
On Fri, Feb 24, 2012 at 1:08 PM, andy pugh bodge...@gmail.com wrote:
On 24 February 2012 17:30, Lars Andersson l...@larsandersson.com wrote:
You can run a BLDC from
Greetings all;
The spindle controller in a 7x10-12-14 is quite a bit different from the
one in my mill, so my question is:
Can it be controlled by essentially the same controller (in this case a
PMDX-106) as has worked so well on the mill?
And if so, how hard is it in hal, to tie the
I am heading off tomorrow to do a bit of sailing. I won't have any
internet at all for 7 weeks.
I will be back in April.
--
atp
The idea that there is no such thing as objective truth is, quite simply, wrong.
--
On Sat, 25 Feb 2012, andy pugh wrote:
Date: Sat, 25 Feb 2012 00:49:58 +
From: andy pugh bodge...@gmail.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: [Emc-users] Signing
On Sat, 25 Feb 2012, andy pugh wrote:
I am heading off tomorrow to do a bit of sailing. I won't have any
internet at all for 7 weeks.
I will be back in April.
Could you please elaborate
Are you sailing between planets, 7 weeks
Being a land locked farm boy it sounds interesting
Richard
On Sat, 2012-02-25 at 00:49 +, andy pugh wrote:
I am heading off tomorrow to do a bit of sailing. I won't have any
internet at all for 7 weeks.
I will be back in April.
I hope you have a great adventure. Bon voyage.
--
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
andy pugh wrote:
It will probably start from rest, certainly with a soft-starting VFD,
and will run synchronously.
However, running synchronously the phase lead will depend only on
load, and will be very small. The field will be almost 100% direct and
zero quadrature.
The effect of this is
andy pugh wrote:
I am heading off tomorrow to do a bit of sailing. I won't have any
internet at all for 7 weeks.
I will be back in April.
Hope you are in the southern hemisphere, the weather in the northern is
still
a bit cool for me.
Enjoy
Jon
On 2/24/2012 7:49 PM, andy pugh wrote:
I am heading off tomorrow to do a bit of sailing. I won't have any
internet at all for 7 weeks.
I will be back in April.
You consider that a bit of sailing!?!?
Good Luck, keep the harness on, and stay warm.
Dave
Here is a hand built XML file for 5i25 with prob_rfx2 firmware.
You need to add the folder '5i25' to /lib/firmware/hm2
then add the XML file to that folder.
You will need administer privileges to do this.
one way is to open a terminal and typesudo nautilus
and then your password.
after
sulfuic acid (battery acid) wont eat copper. might make a matte surface on
brass. then, if silver blackens better than copper, so might a silver plating
applied over matte copper/brass.
http://www.swdinc.com/black_oxide.htm if you have a tin can and a pressure
cooker.
--- On Thu, 2/23/12,
I wonder if one could make an encoder wheel with a thin glass disk, coat
it with a film emulsion, expose it to an image of an encoder wheel, and
develop it like regular film?
Or, use a thin sheet metal disk with photoresist and etch the slots?
I know these techniques are use commercially, I'm
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