Kirk Wallace wrote:
On Sat, 2008-06-07 at 13:06 -0500, Jon Elson wrote:
...snip
would put the PWM duty cycle at 50%, the worst case. What is
your DC supply voltage?
Jon
53 VDC unregulated with 500 uF of filter caps. So far the motor has had
no load. If you need more information let
That should have read re-tuned the DEAD time
Jon
-
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Jeff Epler wrote:
Jon,
What *should* the driving signals look like at the input of your
amplifiers? I assume from your response that I'm making some kind of
rookie mistake here, compounded by the fact that I still don't
understand what the mistake is.
No, maybe not.
My amps were designed
Kirk Wallace wrote:
I can certainly try, but I am using the latest 2.2.5 which should be
fixed. I have pwmdir set true. I measured only logic levels on the dir
pin and analog on the PWM pin. The no load forward and reverse RPM
through the range (0 to 5500) was within 50 RPM.
OK, not a
Kirk Wallace wrote:
These are a little embarrassing, but here are some pictures of my
Pico/Pluto setup:
http://www.wallacecompany.com/machine_shop/Pluto/
The cores of the inductors seem to be heating and not the copper, so it
takes a while for the heat to be detected. It seems that one
Chris Radek wrote:
That was exactly my thinking too. But as others have pointed out,
there could be other things at work. Looseness/backlash in the quill
spline on my bridgeport is significant for instance. The first step
to compensating for it is measuring it, so I was concentrating on
Paul,
Not really sure why you insist on being a total ass, but a
conversation such as this belongs, if it belongs anywhere, on the
developer list. Unless you just want to piss and moan and act like a
complete retard.
Mark
At 03:18 PM 6/7/2008, you wrote:
On Thursday 05 June 2008,
At 06:13 PM 6/7/2008, you wrote:
On Sat, 2008-06-07 at 13:32 -0700, Kirk Wallace wrote:
... snip
I can certainly try, but I am using the latest 2.2.5 which should be
fixed. I have pwmdir set true. I measured only logic levels on the dir
pin and analog on the PWM pin. The no load forward and
I've changed the subject of this to better reflect what it is about, and
am responding on both users and developers lists so that the original
audience will still see it.
I suggest that future follow ups be on just the developers list.
I do seem to recall a prior discussion about data types,
On Sun, 2008-06-08 at 01:21 -0500, Jon Elson wrote:
... snip
Your last order of servo amps may be included in this batch.
If the power transistors say FB260 on them, they need the fix.
If they say 31N20D then they don't.
Jon
My amps have FB260's. Should I put some caps on them?
--
Kirk
Kirk Wallace wrote:
On Sun, 2008-06-08 at 01:21 -0500, Jon Elson wrote:
... snip
Your last order of servo amps may be included in this batch.
If the power transistors say FB260 on them, they need the fix.
If they say 31N20D then they don't.
Jon
My amps have FB260's. Should I put some
Well, I have finally gotten the rigid tapping working, but I'm
not totally satisfied with the results. I'm getting a little
mauling or damage to the top part of the threads.
I am using combined drill-taps. What I am doing now is drilling
the hole through first, then pulling the tap back, and
Thanks for taking the time to reply Ken.
On Sunday 08 June 2008, Kenneth Lerman wrote:
I've changed the subject of this to better reflect what it is about, and
am responding on both users and developers lists so that the original
audience will still see it.
Noted - See below as to why it is
After you get the configuration string set.
Do you need to add the read and write for the second port to the base-thread?
If yes, then what value if any needs to follow the base-thread?
EG:
addf parport.0.read base-thread
addf parport.1.read base-thread 1
addf stepgen.make-pulses base-thread
That looks like it should work if what you want to do is make pulses and
send them to both parports.
On Sun, 2008-06-08 at 23:46 +, Alan Condit wrote:
After you get the configuration string set.
Do you need to add the read and write for the second port to the base-thread?
If yes,
Just thought I'd share my benchtop mill powered by EMC.
http://distinctperspectives.com/coppermine/
It's a work in progress but I've got 3 axes operational - still some
electronics to work on and a few goodies to machine for the mill and then
it'll be 100%.
A question though - when I have the
Hi Greg,
Chances are that dumping the on-board video for a card will change
things.
I'm running an Intel 'Seattle' 600 MHz P3 with a video card and 384
Mb of memory and getting fine response.
HTH
Dave
On Jun 8, 2008, at 6:53 PM, Greg Michalski wrote:
Just thought I'd share my benchtop mill
Silly thing was that the couple PCI video cards I had laying around didn't
work under X AND they increased the latency test results. Maybe I'll grab a
few different cards. One I tried was an S3 Virge and the other an old ATI.
There is no means in the bios for disabling the onboard video
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