Gentlemen,
I have another question/problem. The EMC2 will not move the machine faster
than 100 ipm. I have changed the max everything to high numbers and still
get only 100 ipm. It seems as if the limit again is knowledge/intelligence.
:)
I disconnected the signal to the DAC output and set the
On Thu, Sep 16, 2010 at 08:24:00AM -0500, Stuart Stevenson wrote:
Gentlemen,
I have another question/problem. The EMC2 will not move the machine faster
than 100 ipm. I have changed the max everything to high numbers and still
On touchy's right side is a MV button - that is max velocity, you
OOOK - I assumed it represented 100% - I hadn't paid any attention to
that.
Is there a way to set a max limit or set a default?
thanks :)
Stuart
On Thu, Sep 16, 2010 at 8:53 AM, Chris Radek ch...@timeguy.com wrote:
On Thu, Sep 16, 2010 at 08:24:00AM -0500, Stuart Stevenson wrote:
Stuart Stevenson wrote:
Gentlemen,
I have another question/problem. The EMC2 will not move the machine faster
than 100 ipm. I have changed the max everything to high numbers and still
get only 100 ipm. It seems as if the limit again is knowledge/intelligence.
Well, PID_MAX_VEL = 30, and
On Thu, Sep 16, 2010 at 10:14:00AM -0500, Stuart Stevenson wrote:
OOOK - I assumed it represented 100% - I hadn't paid any attention to
that.
Is there a way to set a max limit or set a default?
Currently both those features are unimplemented...
It might also be nice if it were saved
On 15 September 2010 02:50, Stuart Stevenson stus...@gmail.com wrote:
Gentlemen,
The servo amps on the Enshu have different accel/decel shapes. The
PID.output trace has a sharp corner to it. The trace raises a little and
then turns almost straight up. The decel trace is MUCH more rounded.
On Wed, Sep 15, 2010 at 12:07 AM, Jon Elson el...@pico-systems.com wrote:
Stuart Stevenson wrote:
Gentlemen,
The servo amps on the Enshu have different accel/decel shapes. The
PID.output trace has a sharp corner to it. The trace raises a little and
then turns almost straight up. The
I forgot to mention the files in the enshu directory with the pictures are
the current files the machine is configured with.
thanks
Stuart
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Start uncovering the many advantages of virtual appliances
On Wed, Sep 15, 2010 at 08:22:41AM -0500, Stuart Stevenson wrote:
pictures are here
http://www.mpm1.com:8080/machines/enshu
there are pictures of all three axes both positive and negative moves
It looks like the axes can't accelerate as fast as you are requesting.
It seems like they have
On Wed, Sep 15, 2010 at 09:07:28AM -0500, Chris Radek wrote:
It looks like the axes can't accelerate as fast as you are requesting.
After looking at it again, this comment is wrong.
The problem is that your tuning is completely wrong for velocity
mode. With P only, you're commanding a
Chris,
I have tried all sorts of combinations of tuning. I set this to be the
simplest and show what I am seeing. Nothing I have done has changed the
general shape of the traces.
I will see what I can do with your instructions.
thanks
Stuart
On Wed, Sep 15, 2010 at 9:26 AM, Chris Radek
Gentlemen,
http://www.mpm1.com:8080/machines/enshu/Screenshot.png
This is set up with Pgain = 10, FF1 = 1 and scale = 8.89.
I have tried Pgain = 0 - got no PID output
Pgain = 100 - got a little better
Pgain = 300 - not much better but didn't feel as good
Stuart:
Didn't Cradek just do this?? ... the tach simulation with some Mesa
controls on his Mori Jr mill?
So your drives do not require the commutation signals that on some Fanuc
systems was derrived from the encoder on the motor via the controls??
I never really fully understood the Fanuc
Stuart,
From your .ini file :
MAX_VELOCITY = 12 or 15 inches/second? That is 720 or 900 IPM.
Can the machine really do that? You don't show pid.0.output, it would be
useful to see if the PID output is saturating. (It probably is.)
I think Chris is right, the servo, at least set up the way it
On Wed, Sep 15, 2010 at 12:24 PM, Dave e...@dc9.tzo.com wrote:
Stuart:
Didn't Cradek just do this?? ... the tach simulation with some Mesa
controls on his Mori Jr mill?
So your drives do not require the commutation signals that on some Fanuc
systems was derrived from the encoder on the
the max velocity for the latest scope picture is 8 and the DAC scale is 8.89
the machine was moving at 400 ipm with the original control
8 is the result of many attempts up/down to cause a difference in the
feedback
I just happened to stop with 8 as the number. This would be 480 ipm. I don't
On Wed, Sep 15, 2010 at 12:16:40PM -0500, Stuart Stevenson wrote:
Gentlemen,
http://www.mpm1.com:8080/machines/enshu/Screenshot.png
This is set up with Pgain = 10, FF1 = 1 and scale = 8.89.
I have tried Pgain = 0 - got no PID output
Pgain = 100 - got a little better
Hi Stuart,
Do you have some part numbers for these drives?
- Original Message -
From: Stuart Stevenson stus...@gmail.com
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Sent: Wednesday, September 15, 2010 3:22 PM
Subject: Re: [Emc-users] simple servo amplifier
On Wed, Sep 15, 2010 at 1:53 PM, Chris Radek ch...@timeguy.com wrote:
On Wed, Sep 15, 2010 at 12:16:40PM -0500, Stuart Stevenson wrote:
Gentlemen,
http://www.mpm1.com:8080/machines/enshu/Screenshot.png
This is set up with Pgain = 10, FF1 = 1 and scale = 8.89.
I have tried Pgain = 0
On Wed, Sep 15, 2010 at 2:08 PM, Belli Button be...@iafrica.com wrote:
Hi Stuart,
Do you have some part numbers for these drives?
p/n's are in this file
http://www.mpm1.com:8080/machines/enshu/enshu.txt
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dos centavos
On Wed, Sep 15, 2010 at 12:42:55PM -0500, Jon Elson wrote:
The PPMC
driver takes a +/- 1.0 value and multiplies it by 10 to give a +/- 10 V
output range.
Are you sure? I was looking at the pwmgen code earlier instead of the
dac code (not sure how these differ) and I *think* pwmgen full scale
Hi,
I checked the DAC output - it was .889 - I changed the scale from 8.89 to
.889 - the response was back to just like before.
The config files to match this picture are available
The latest picture is;
http://www.mpm1.com:8080/machines/enshu/Screenshot-1.png
thanks
Stuart
--
dos
On Wed, Sep 15, 2010 at 03:32:31PM -0500, Stuart Stevenson wrote:
Hi,
I checked the DAC output - it was .889 - I changed the scale from 8.89 to
.889 - the response was back to just like before.
The config files to match this picture are available
The latest picture is;
On Wed, Sep 15, 2010 at 04:08:31PM -0500, Chris Radek wrote:
On Wed, Sep 15, 2010 at 03:32:31PM -0500, Stuart Stevenson wrote:
Hi,
I checked the DAC output - it was .889 - I changed the scale from 8.89 to
.889 - the response was back to just like before.
The config files to match this
On Wed, Sep 15, 2010 at 5:34 PM, Chris Radek ch...@timeguy.com wrote:
On Wed, Sep 15, 2010 at 04:08:31PM -0500, Chris Radek wrote:
On Wed, Sep 15, 2010 at 03:32:31PM -0500, Stuart Stevenson wrote:
Hi,
I checked the DAC output - it was .889 - I changed the scale from
8.89 to
.889 -
Stuart Stevenson wrote:
Hi,
I checked the DAC output - it was .889 - I changed the scale from 8.89 to
.889 - the response was back to just like before.
The config files to match this picture are available
The latest picture is;
http://www.mpm1.com:8080/machines/enshu/Screenshot-1.png
The tuning numbers are in
http://www.mpm1.com:8080/machines/enshu/enshu.ini
as you will see the FF1 number is close to 1
I started with FF1 = 1 and P = 10
I still think I would get a better tune if I cancelled the tuning in the
servo amp.
Then my tuning numbers would make sense as I would not be
Chris Radek wrote:
On Wed, Sep 15, 2010 at 12:42:55PM -0500, Jon Elson wrote:
The PPMC
driver takes a +/- 1.0 value and multiplies it by 10 to give a +/- 10 V
output range.
Are you sure? I was looking at the pwmgen code earlier instead of the
dac code (not sure how these differ)
On Wed, Sep 15, 2010 at 10:21:03PM -0500, Jon Elson wrote:
Now, if you use the OUTPUT_SCALE of 0.889, and PID is limited to +/- 1.0
as the
maximum range, it will limit the DAC output to +/-1.12 V. Is this
reasoning right?
Yes I think so. That's why Stuart S has his pid maxoutput set to
Stuart Stevenson wrote:
The tuning numbers are in
http://www.mpm1.com:8080/machines/enshu/enshu.ini
as you will see the FF1 number is close to 1
I started with FF1 = 1 and P = 10
I still think I would get a better tune if I cancelled the tuning in the
servo amp.
Then my tuning numbers
Chris Radek wrote:
Yes I think so. That's why Stuart S has his pid maxoutput set to 8,
which is the same as the machine's maxvel. That lets pid units be
real world units inches/sec.
Yes, this way of setting it up is starting to make sense (after only 10
years of
making everything
Stuart Stevenson wrote:
Gentlemen,
The servo amps on the Enshu have different accel/decel shapes. The
PID.output trace has a sharp corner to it. The trace raises a little and
then turns almost straight up. The decel trace is MUCH more rounded. Does
this sound like an amplifier problem?
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