I will be out of the office starting 05/16/2008 and will not return until
05/26/2008.
I will respond to your message when I return (Monday).
-
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R)
Jim,
Most audio amplifiers have a large capacitor on the output to block DC
current. DC is not good for speakers. Class D power amps use PWM based
drivers that might work for driving motors. I am not sure but I don't
think they have the caps on the output. You would have to look at the
specs
You have to reference the signal with it's counterpart. The signal should
have two pins, a plus and minus. A comparator would work to convert the
signal to a single ended (referenced to ground) signal.
or use a RS-422 transeiver chip (ST490AB).
Jim C
Yep. You got it
Jim C
Kirk Wallace
[EMAIL PROTECTED]
company.com
Based on the latency results (187525) you are not going to be able to run
EMC on that machine.
I had the same problem. The problem is most likely caused by running an
integrated video interface which
is sharing system RAM. You need to install a video card. Literally any
video card should work.
Kirk,
Yes, I have used the dampers and they work well. My motors at home don't
have the dual shafts. I made due with some old motors. Things are working
well for me right now without them. I could run faster if I had them on
the motors.
Here are work, I have seen the results and it's not
Please, I did not in any way mean to be unfair to EMC. I did not mean it
in that way at all.
EMC is a fantastic program.
What I mean is that by doing the electronic gearing there is no way to
avoid a condition where a stepper motor is operating at a step rate where
resonance is present. It
Gene,
I may have to investigate adding dampers like you have done. I didn't
consider adding it between the motor and the machine. I had always seen
dampers on the back side of the steppers.
Jim C
-
This SF.net email is
Ian,
I am using the basic output from HAL via a 1284 parallel printer port,
(mode 2). The stepper motor drivers are just doing the chopping to limit
current. I didn't change HAL in any way.
The one thing you might try is to limit the acceleration.
I was surprised when I raised the motor
Ian,
You Wrote:
I am using a motor of indeterminate voltage (no plate on it) but which I
think is probably about 4.5 - 5 volt and I am driving it
with 12 volts. At this I can get a fair speed out of it but, having read
another post on this list which recommended using the highest voltage
I have a mechanical setup very similar to what you have described. I am
not using any micro-step of the motors
and have so far seen excellent results. My workspace is about 20 inches by
20 inches.
Here is a typical stepper motor spec for what you can use:
Ian,
What is the feed rate units for the spindle? RPM or Rev Per Sec?
My initial look suggests the scale factor (13.333) needs to be much
higher.
Jim C
Ian W. Wright
Ah. How right you are!
Thanks, Jim C
ben lipkowitz
[EMAIL PROTECTED]
r.org
I converted normal.cxf to normal.ngc
I chose to make the arcs using a series of line segments (G1) using 5
degree units vs using the G3
command.
Here is a link to the file.
http://wiki.linuxcnc.org/uploads/normal.ngc
I will convert the rest of the fonts tonight.
Jim Combs - Lexington, Ky
Thanks for the pointers.
Jim Combs
Jon Elson
[EMAIL PROTECTED]
ms.com
I can't seem to get to that link. (At least from Lexmark) I will try it
from home.
Thanks, Jim C
Alex Joni
[EMAIL PROTECTED]
I have built up a router table with XYZ motion stages. My intent is to
produce wood and
Corian type signs. I have EMC driving steppers via a 1284 parallel port.
It's working
out very well. Now I am looking for fonts in the form of G code. Does
anyone know of any?
I have code to resize and
Yep! Wilson machine bought a 50' x 4' CMM at a Boeing auction. Got it
cheap and spent a million moving it and
getting it set up again. And that was only a few miles.
Holy COW! a 50 FOOT CMM? There must only be 2 or 3 in the
entire US that big. (I can understand why Boeing would need
such a
John, Kirk,
Thanks so much for the help.
It was the ctrl_type = v,v,v that was the biggest problem.
I am off and running now with phased motor drivers.
Tonight, I can finish the wiring and then off we go.
If anyone is interested in the .HAL and the .INI files, let me know. I
didn't want to
I am new to this, and need some help.
I am trying to setup a three axis mill using stepper motors and a parallel
port
to output the motor phases.
I have used the step wizard and that works but it defaults to mode 0 (step-
direction). When I change to mode 2 (Phase A/B), I get HAL errors. I
Yep, I do get the real time errors. I have fixed most of the obvious
ones. I have my setup at home and for some strange reason my E-Mails from
home get bounced back immediately from the list server although I am
getting output from the server (different problem).
I will grab one of the error
Hope posting this does not offend anyone, but here is the .hal file edited.
I commented out the old mode 0 lines and added in the mode 2 lines based on
my interpretation of the section 7 HAL documentation. Is there some other
file that I need to change or are all my troubles in these changes?
I
22 matches
Mail list logo
