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
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.
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
On Sun, 2009-06-14 at 20:24 -0700, Kirk Wallace wrote:
On Sat, 2009-06-13 at 22:31 -0700, Kirk Wallace wrote:
On Fri, 2009-06-12 at 22:22 -0700, Kirk Wallace wrote:
In case anyone is interested, I have an .ngc file that I'll probably run
tomorrow, but if anyone finds anything that might
(Other good news/bad news. I blew out the serialDAC, but had
a spare chip. I'm looking for advise on how to protect the
output op-amp:
http://www.wallacecompany.com/machine_shop/EMC2/serial_dac/ser
ial_dac_sch.png
I'm not sure if this is what you are looking for, but there was an example
On Fri, 2009-06-26 at 14:52 +1000, Frank Tkalcevic wrote:
(Other good news/bad news. I blew out the serialDAC, but had
a spare chip. I'm looking for advise on how to protect the
output op-amp:
http://www.wallacecompany.com/machine_shop/EMC2/serial_dac/ser
ial_dac_sch.png
Oops, looks
On Mon, 2009-06-15 at 00:09 -0500, Jon Elson wrote:
Kirk Wallace wrote:
I replaced the PC and ran an air part. I noticed that the screen blanked
near slot 19, but the I got the screen back with the mouse and the part
completed with out interruption. I disabled the screen saver and ran two
out?
Martin
--- On Mon, 6/15/09, Kirk Wallace wrote:
From: Kirk Wallace kwall...@wallacecompany.com
Subject: Re: [Emc-users] Non-invoked Program Stop, Re: .ngc file RFReview
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Date: Monday, June 15, 2009, 1:29 AM
On Mon, 2009
If you take the endmill out, you won't have to change the program -- maybe
there is a divide-by-zero that doesn't happen unless the tool is in the
right spot.
I'd try to do away with cutting most of the slots that you know work, to
reduce the wait if nothing else. Looks like that can be done by
Kirk Wallace wrote:
I doubt that EMC2 is the cause but rather is reacting to the fault. I
need to think more about how this could happen without setting an alarm
and moving home to the last tooling position. Another problem is that it
takes 20 minutes to get to the nineteenth hole. So testing
On Mon, 2009-06-15 at 11:05 -0500, Jon Elson wrote:
Kirk Wallace wrote:
I doubt that EMC2 is the cause but rather is reacting to the fault. I
need to think more about how this could happen without setting an alarm
and moving home to the last tooling position. Another problem is that it
On Sun, Jun 14, 2009 at 08:24:17PM -0700, Kirk Wallace wrote:
I tried making the part tonight and ran into a problem. I did a dry run
in air which stopped at slot 19 of 25.
I know it's not a very useful data point, but I ran your program
three times and did not see any problem. I will try
On Sat, 2009-06-13 at 22:31 -0700, Kirk Wallace wrote:
On Fri, 2009-06-12 at 22:22 -0700, Kirk Wallace wrote:
In case anyone is interested, I have an .ngc file that I'll probably run
tomorrow, but if anyone finds anything that might improve it, I would
appreciate hearing from you. Thanks.
Kirk Wallace wrote:
I replaced the PC and ran an air part. I noticed that the screen blanked
near slot 19, but the I got the screen back with the mouse and the part
completed with out interruption. I disabled the screen saver and ran two
more air parts which completed properly. I set up the
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