On Mon, Dec 1, 2014 at 3:48 PM, Stuart Stevenson wrote:
> After this problem has some type of resolution you must remember
>
> If it has tits or wheels it will cost money and cause problems. :)
>
>
>
I always heard, "If it flies, floats, or fornicates rent it...[?]
Mark
-
> Sent: Monday, December 1, 2014 12:46:40 AM
> Subject: Re: [Emc-users] EMC communication problem then motor start
>
> I found this http://www.x2y.com/publications/dcmotors/feb14-05.pdf
> document which may be useful for others, observe however it is written by
> the company who sell t
"
To: "Enhanced Machine Controller (EMC)"
Sent: Monday, December 1, 2014 12:46:40 AM
Subject: Re: [Emc-users] EMC communication problem then motor start
I found this http://www.x2y.com/publications/dcmotors/feb14-05.pdf document
which may be useful for others, observe however it is wr
I found this http://www.x2y.com/publications/dcmotors/feb14-05.pdf document
which may be useful for others, observe however it is written by the company
who sell the GOOD components. The noise is there, it worked on the table but
disturb communication on real, hopefully I will be able to test ag
I've had a couple of installations where filters were required and in
both cases the problem was that the drives (servo drives recently, VFDs
previously) were pumping noise back into the AC line which got into the
other power supplies and or radiated onto the low voltage circuits and
caused pro
On 11/27/2014 08:32 AM, Karlsson & Wang wrote:
> A small value capacitor decrease the problem so I guess the
> commutation spikes are the problem but driving a capacitive load is
> not good.
>
> Nicklas Karlsson
(My general view on noise)
One should not expect to simply run a wire from a signal so
6 22:12, Peter C. Wallace wrote:
> > > > On Wed, 26 Nov 2014, Karlsson & Wang wrote:
> > > >
> > > >> Date: Wed, 26 Nov 2014 20:53:56 +0100
> > > >> From: Karlsson & Wang
> > > >> Reply-To: "Enhanced Machine Cont
;> Date: Wed, 26 Nov 2014 20:53:56 +0100
> > > >> From: Karlsson & Wang
> > > >> Reply-To: "Enhanced Machine Controller (EMC)"
> > > >>
> > > >> To: "Enhanced Machine Controller (EMC)" <
> >
;> From: Karlsson & Wang
> > >> Reply-To: "Enhanced Machine Controller (EMC)"
> > >>
> > >> To: "Enhanced Machine Controller (EMC)" <
> emc-users@lists.sourceforge.net>
> > >> Subject: Re: [Emc-users] EMC communi
& Wang wrote:
> >
> >> Date: Wed, 26 Nov 2014 20:53:56 +0100
> >> From: Karlsson & Wang
> >> Reply-To: "Enhanced Machine Controller (EMC)"
> >>
> >> To: "Enhanced Machine Controller (EMC)"
> >> Subject: Re:
Machine Controller (EMC)"
>> Subject: Re: [Emc-users] EMC communication problem then motor start
>>
>> The switching is very fast because gate transistor is 10 ohm so I will
>> increase as an intermediate solution. The problem is however still
>> interesting becau
"
> >
> > To: "Enhanced Machine Controller (EMC)"
> > Subject: Re: [Emc-users] EMC communication problem then motor start
> >
> > The switching is very fast because gate transistor is 10 ohm so I will
> > increase as an intermediate solutio
On Wed, 26 Nov 2014, Karlsson & Wang wrote:
> Date: Wed, 26 Nov 2014 20:53:56 +0100
> From: Karlsson & Wang
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] EMC communicati
The switching is very fast because gate transistor is 10 ohm so I will increase
as an intermediate solution. The problem is however still interesting because
it is so common.
Nicklas Karlsson
On Wed, 26 Nov 2014 19:34:44 +
David Armstrong wrote:
> i normaly make sure that all low voltag
i normaly make sure that all low voltage wiring is sheilded and watch for
ground loops and vfd inputs are via filters and Balance transformers ,
ethernet coms are usually problem free so long as you use good cables and
not the cheap Aluminium wire ones as they are using balanced paired cores
, in
I have tried with USB isolator made with Icoupler devices from analog devices
on other products without luck. I am using ethernet which I think have a
isolation transformer. I do not think there are any tolerances for missed
packets right now. For serial communication I have tried opto couplers
I have had many problems with USB communications with motors and plasma.
You can overcome these by putting an electrically isolated barrier in
the usb line. There are some chips from Linear (LTM2448) that will do
just that. The equipment on either end cannot be connected to the same
ground or s
PWM is great for efficient motor but unfortunately it is also very good at
disturbing digital communication. Do anybody had any problems with the
communication errors then motor start?
Nicklas Karlsson
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