Greetings all;
Is anyone aware of a quick dirty retrofit kit to brake an AC universal
motor when the power is removed?
I have a Ryobi BT-3000 table saw, which when kept properly adjusted, does a
fine job. Its motor package is a universal motor that drives the blade
with a gilmer belt.
I
Gene,
You were very lucky.
Read this link down the page a bit...
http://woodworking.com/forum/showthread.php?18869-Miter-Saw-Brake
I think after you remove power, if you short out the motor, , the motor
will come to a stop. You might want to short it out through a resistor
to avoid having
I got one of those big old paddle switches:
http://1.bp.blogspot.com/_FFglI1QNcfg/S9Ih9zOBQxI/Ac8/cNo6rBODOkw/s1600/Safety+Stop+Switch+%28Grizzly+H8243%29.PNG
and mounted it exactly where my left knee is. The only downside is it's not
a magnetic switch, so I left the original magnetic
If you can't discipline yourself to watch it stop, it seems evident
that should figure out how to mount an overhead guard. The BT3000 was
a really nice saw, but mine developed a sticky off switch after a
couple of years.
Eric
On Wed, Jun 1, 2011 at 8:13 AM, gene heskett ghesk...@wdtv.com wrote:
Seems to me the best way to cut off some fingers is to depend on a
switch to stop the blade. At some point it will fail and you from habit
will stick yore fingers near. Just keep your hands in your pockets
until the blade stops. Just like any other safe working habits depend on
good
gene heskett wrote:
Greetings all;
Is anyone aware of a quick dirty retrofit kit to brake an AC universal
motor when the power is removed?
Oh, if you want quick and dirty, I already answered that. If you want a
faster stop, then a
relay that would apply something like 12 VAC from a
Gene, I suppose that your AC universal motor is an induction motor
with a field winding and a cage rotor. (If it were a motor with rotor
windings and a brush armature, it would be a AC-DC-universal motor and
the following recipe would not apply). When the power supply is cut off,
there is no
Very good point Peter. I've had the same thing happen to me. A lot of angular
momentum in a spinning blade.
From: Peter Blodow p.blo...@dreki.de
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Sent: Wed, June 1, 2011 1:45:20 PM
Subject:
Hello, folks. I'm getting a machine set up for EMC2. I have the 10.04
distro installed and the latency test looks ok so far.
Is it ok to apply updates from Update Manager? Is there a subset
(kernel, etc) to never update?
Thanks.
-Pete
Issaqah, WA
database 6172 (20110601) __
The message was checked by ESET Smart Security.
http://www.eset.com
--
Simplify data backup and recovery for your virtual environment with vRanger.
Installation's a snap, and flexible
I update everything every night.
It was rather trouble free.
i
On Wed, Jun 1, 2011 at 4:24 PM, Peter Loron pet...@standingwave.org wrote:
Hello, folks. I'm getting a machine set up for EMC2. I have the 10.04
distro installed and the latency test looks ok so far.
Is it ok to apply updates
Gene,
I built it from source,
What tarball version?
I grabbed the latest from the source repository, following the instructions
here:
http://code.google.com/p/heekscad/wiki/BuildWithCmakeOnUbuntu
At the bottom of that link there is a script that does it all. If your not
using
On Wednesday, June 01, 2011 07:08:02 PM Dave did opine:
Gene,
You were very lucky.
That's the way I read it. ;)
Read this link down the page a bit...
http://woodworking.com/forum/showthread.php?18869-Miter-Saw-Brake
I think after you remove power, if you short out the motor, , the
Cool, thanks.
On 06/01/2011 02:41 PM, Igor Chudov wrote:
I update everything every night.
It was rather trouble free.
i
On Wed, Jun 1, 2011 at 4:24 PM, Peter Loronpet...@standingwave.org wrote:
Hello, folks. I'm getting a machine set up for EMC2. I have the 10.04
distro installed and
On Wednesday, June 01, 2011 07:36:24 PM doug metzler did opine:
I got one of those big old paddle switches:
http://1.bp.blogspot.com/_FFglI1QNcfg/S9Ih9zOBQxI/Ac8/cNo6rBODOk
w/s1600/Safety+Stop+Switch+%28Grizzly+H8243%29.PNG
Precisely what I am going to build, but rather than pay
On Wednesday, June 01, 2011 07:43:11 PM Eric Keller did opine:
If you can't discipline yourself to watch it stop, it seems evident
that should figure out how to mount an overhead guard. The BT3000 was
a really nice saw, but mine developed a sticky off switch after a
couple of years.
Eric
On Wednesday, June 01, 2011 11:03:20 PM Jon Elson did opine:
gene heskett wrote:
Greetings all;
Is anyone aware of a quick dirty retrofit kit to brake an AC
universal motor when the power is removed?
Oh, if you want quick and dirty, I already answered that. If you want a
faster
On 06/01/2011 07:05 PM, Rondal Nannie wrote:
I have a 3 jaw Emco chuck and would like to know where to buy a chuck key. I
have a few Jacob
chuck keys but they do not fit. Any Ideas as to where I could locate one or
the size Jacob key
that is used for these? Thanks in advance Ron
Exactly
I have a Delta Chop saw that has a button on the handle. After I am
done cutting I can just press the button and the saw comes to a complete
and sudden stop.
My 12 Dewalt doesn't have a separate button, releasing the trigger does
it.
Nice, the Delta chop saw I have is one of
On Wednesday, June 01, 2011 11:14:32 PM Peter Blodow did opine:
Gene, I suppose that your AC universal motor is an induction motor
with a field winding and a cage rotor.
Nope.
(If it were a motor with rotor
windings and a brush armature, it would be a AC-DC-universal motor
It is, complete
On Wednesday, June 01, 2011 11:40:41 PM Dave did opine:
I have a Delta Chop saw that has a button on the handle. After I am
done cutting I can just press the button and the saw comes to a
complete and sudden stop.
My 12 Dewalt doesn't have a separate button, releasing the trigger
On 06/01/2011 07:36 PM, emc-users-requ...@lists.sourceforge.net wrote:
The resistor I did use when I was building the interface for my mills
spindle, because I read someplace that a dead short could result in field
demagnetization under the right conditions. There I used a 20 ohm 20 watt
gene heskett wrote:
Well, I did the deed, and I have verified that when the switch is off,
there is a dead short across the receptacle the motor is plugged into.
About 20 tests with the saw motor plugged into it, no effect. Unplug the
saw motor and plug in a cheap Skil router I have
cogoman wrote:
*It seemed counter-intuitive to me, but from reading stepper motor
controller data sheets I've found that if you short out a winding, the
current takes longer to decay than if you put a resistor across it, and
make it pump energy into a higher voltage. I don't know how this
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