Thanks for the link, Frank. I wish I were better at
electronics, then I would know what this circuit does. It
looks like the op-amps only have a 10kOhm resistor on their
outputs, which would limit the current going in or out of the
amp. This may offer current protection but maybe not
Hi Jeff,
Thaks for that. It should do what I want.
Les
Jeff Epler wrote:
Perhaps you can find inspiration from
http://media.unpythonic.net/emergent-files/sandbox/error.comp
Jeff
--
Hi Andy,
That is one of the reasons why I want to show a message. Low slideway
lube will not estop the machine but will stop you starting a new part.
Low hydraulic pressure or a spindle inverter fault will estop the machine.
Les
Andy Pugh wrote:
You might want to consider more than one
You might consider putting an emitter follower circuit at the output
of your circuit. The NPN Darlington configuration might be appropriate.
On Fri, 2009-06-26 at 08:36 -0400, Kenneth Lerman wrote:
You might consider putting an emitter follower circuit at the output
of your circuit. The NPN Darlington configuration might be appropriate.
Hi
There are a lot of information about tune up ac servomotor. On internet in
many books. Problem is unless you have electrical engineering degree or
extended training in that are of science it is hard to implement those
information while working on EMC2.
Steps that I describe from book are not
2009/6/26 Kirk Wallace kwall...@wallacecompany.com:
Either way, a 2n3904 is much less expensive than a DAC.
One concern is, how much error will be introduced?
If you use an Op-Amp as your buffer, then almost no error will be
introduced and you don't need any external components. They only cost
I've got my machine built and cutting (small signs, model parts). I'm using
X0, Y0, Z0 for home. I converted some DXF designs to gcode and they use the
center of the design for 0,0,0. I moved home to the center of the workpiece
but it won't move in the minus direction - exceeds minimum limits -
On Jun 26, 2009, at 11:17 AM, pstenl...@portoflongview.com wrote:
I've got my machine built and cutting (small signs, model parts).
I'm using
X0, Y0, Z0 for home. I converted some DXF designs to gcode and they
use the
center of the design for 0,0,0. I moved home to the center of the
On Friday 26 June 2009, pstenl...@portoflongview.com wrote:
I've got my machine built and cutting (small signs, model parts). I'm using
X0, Y0, Z0 for home. I converted some DXF designs to gcode and they use the
center of the design for 0,0,0. I moved home to the center of the workpiece
but it
Greetings all;
I find I am in need of a bandsaw with at least 12.5 of resaw capability, and
I'm reluctant to buy a Rikon 10-325 to get it as that will be circa a kilobuck
by the time I fit it with a WoodSlicer blade, a mitre gauge, a pack of table
inserts pay the freight.
The only real
Some time ago there were a few mails about an EMC Fest in Europe.
Just this week another Dutch EMC user (Dirk) sent me an email to trigger
me about the silence about the European EMC Fest. We both feel the need
to do something - even if it is just the two of us :-}
But I do not have that much
I put my 20 inch Oliver on a VFD and absolutely love it!
Single phase in, and three phase out with variable speed. It's a direct
drive 860 RPM motor, so it runs smooth and quiet!
So Sweet.
Cal
Greetings all;
I find I am in need of a bandsaw with at least 12.5 of resaw capability,
and
Weird, you are the second within a couple of days notifying me about the
Euro-EMC idea.
Yes, it was me who brought that up. Unfortunately there was too little
interest as very very very few who responded. I had a couple of good
locations on spot and even a machine that was free for play (ie, it
Get a 3Phase VFD and as long as you have 220 single phase you will be
ok. I run a 16Inch resaw with a 3HP motor that way.
Good luck!
R
Those guy's are in the neighborhood and have good prices and service:
http://www.dealerselectric.com/
On Fri, Jun 26, 2009 at 4:24 PM, Gene
On Friday 26 June 2009, Rainer Schmidt wrote:
Get a 3Phase VFD and as long as you have 220 single phase you will be
ok. I run a 16Inch resaw with a 3HP motor that way.
Good luck!
R
Those guy's are in the neighborhood and have good prices and service:
http://www.dealerselectric.com/
+10,
Regarding VFD's
A poly phase input unit may be used even if single phase is the only power
avilable. The VFD must be sized a bit (1.5 -2 X) to accommodate the
current through the DC rectifiers.
The units I have (a Toshiba and two Siemens) all came by way of E-bay (New
in box) and cost less than
On Friday 26 June 2009, cmg...@sover.net wrote:
Regarding VFD's
A poly phase input unit may be used even if single phase is the only power
avilable. The VFD must be sized a bit (1.5 -2 X) to accommodate the
current through the DC rectifiers.
The units I have (a Toshiba and two Siemens) all came
Gene
I am not quite sure of the math but you also might consider a 240V
in VFD drive to convert it to 3 phase. This is recommended many times
as almost a break even choice when replacing large single phase motors
for mills and lathes as a 3 phase motor is enough cheaper that it plus
the
On Friday 26 June 2009, Hubert Bahr wrote:
Gene
I am not quite sure of the math but you also might consider a 240V
in VFD drive to convert it to 3 phase. This is recommended many times
as almost a break even choice when replacing large single phase motors
for mills and lathes as a 3 phase
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