On Tuesday 08 December 2020 19:56:13 Chris Albertson wrote:
> If the output of the PID controller is force ad the measured feedback
> is the position, a P only controller will always oscillate. Friction
> will damp it eventually. A negative "D" will reduce the velocity and
> help with
The way to wire an emergency stop circuit with 2 or more things that can
trigger it, is to have it a normally closed circuit and every stop switch,
mechanical or electronic, in series.
That way when anything triggers a stop it opens the circuit, the controller
senses that and stops sending
If the output of the PID controller is force ad the measured feedback is
the position, a P only controller will always oscillate. Friction will
damp it eventually. A negative "D" will reduce the velocity and help with
overshoot and "I" is required if the final result has an offset.
The root
On Tuesday 08 December 2020 19:05:52 Chris Albertson wrote:
> What next? You have set P-gain but what about I and D gains?
>
That has been tried, gently, but doesn't seem to have the desired effect.
> On Tue, Dec 8, 2020 at 12:49 PM Gene Heskett
wrote:
> > Lo all;
> >
> > I'm back to playing
On Tuesday 08 December 2020 18:17:11 Sven Wesley wrote:
> Friends,
>
> I am in the process of refreshing a CNC that has been running in
> "temporary state" the last 12 years, time to give it an overhaul. I've
> found the magic little piece we all call 7i96. It will do magic.
>
> The servo drives
What next? You have set P-gain but what about I and D gains?
On Tue, Dec 8, 2020 at 12:49 PM Gene Heskett wrote:
> Lo all;
>
> I'm back to playing with the servo again, following John Thorntons
> instructs from the wiki article. And I note a couple things.
>
> 1. The pid_a.FF1 value has
On Wed, 9 Dec 2020, Sven Wesley wrote:
Date: Wed, 9 Dec 2020 00:53:25 +0100
From: Sven Wesley
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] 7i96 multi wire input
Den ons 9 dec. 2020 kl 00:37 skrev Peter C. Wallace :
On
That sounds a lot like the UHU_ESTOP circuit. I've attached a PDF of it.
Maybe that will help.
John
> -Original Message-
> From: Sven Wesley [mailto:svenne.d...@gmail.com]
> Sent: December-08-20 3:17 PM
> To: Enhanced Machine Controller (EMC)
> Subject: [Emc-users] 7i96 multi wire
Den ons 9 dec. 2020 kl 00:37 skrev Peter C. Wallace :
> On Wed, 9 Dec 2020, Sven Wesley wrote:
>
> > Date: Wed, 9 Dec 2020 00:17:11 +0100
> > Friends,
>
> > I am in the process of refreshing a CNC that has been running in
> "temporary
> > state" the last 12 years, time to give it an overhaul.
On Wed, 9 Dec 2020, Sven Wesley wrote:
Date: Wed, 9 Dec 2020 00:17:11 +0100
From: Sven Wesley
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: [Emc-users] 7i96 multi wire input
Friends,
I am in the process of refreshing a CNC that has been
Friends,
I am in the process of refreshing a CNC that has been running in "temporary
state" the last 12 years, time to give it an overhaul. I've found the magic
little piece we all call 7i96. It will do magic.
The servo drives have been running flawlessly and the plan is to keep them.
They have
Hi Gene,
> From: Gene Heskett [mailto:ghesk...@shentel.net]
> On Tuesday 08 December 2020 02:04:49 John Dammeyer wrote:
>
> > > I think I'd be measuring the ohmage and inductance of each winding
> > > in that motor. A partially shorted winding would be on my suspects
> > > list.
> > >
> > > They
Lo all;
I'm back to playing with the servo again, following John Thorntons instructs
from the wiki article. And I note a couple things.
1. The pid_a.FF1 value has little or no effect on the amplitude of the error.
So that probably needs addressed by educating me on how its calculated.
Those look useful so thanks!
I'm doing the software that receives the serial data so I should able to
read and process everything fast enough to not require flow control. Even if
I miss a message the next update message will be good enough. I'll probably
include a start of message and definitely
I wanted to do about the same thing and found this:
http://linuxcnc.org/docs/html/hal/halmodule.html
Also in addition to the above you will need to write to a serial port.
Here is a walkthrough:
https://pyserial.readthedocs.io/en/latest/shortintro.html
Are you designing the USB device? If so
I am attempting to produce a Python component which periodically outputs
X/Y/Z/A coordinates via a serial port that is actually a USB connection.
This is similar to what is required for pendants that display the current
coordinates. Can anyone suggest a tutorial or source code that could be
And a/o about 13:30 local, I am alone again. My Dee has passed.
>
Gene, my sincere condolences.
Please let me express my respect for how you took care of your loved one,
giving companionship and comfort.
You are an inspiration to us young'uns.
___
> From: Roland Jollivet [mailto:roland.jolli...@gmail.com]
> Solder a bridging wire under the pcb directly to the output Fet or whatever.
> And/or maybe solder wires from the posts to an off-board connector so there
> are no connectors on the board itself.
>
I'm not sure which FET to solder to
Solder a bridging wire under the pcb directly to the output Fet or whatever.
And/or maybe solder wires from the posts to an off-board connector so there
are no connectors on the board itself.
On Tue, 8 Dec 2020 at 06:39, John Dammeyer wrote:
> The attached photo is of the last time but this
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