Connecting to a CNC machine, pros and cons of USB vs PP vs Ethernet etc.

[Jess]

Because after all we are talking, or I am, about expereices using Motion control cards working with Mach3 and not about the Protocol used to do this.

We were both very obviously talking about the connection/protocol. For example; here you are, talking specifically about the protocol used, only a scant few posts ago:

The Same can't be said for USB it's irratic and unpredictable. There's so many things that can affect it IMO it's not a good or suitable connection for reliable Motion control.

Then your very next post; talking about protocol again:

Ethernet is much better than USB for Motion control

My Experience with USB and Mach3 hasn't been good or stable regardless of Device Supplier or PC.

That's fine - that's a claim based on your experience; I'm not trying to argue that you've never used a good or stable one!

However...you're not saying the same thing when your words are about USB as a whole. When you claim that USB is not a 'good or suitable connection for reliable Motion control' you're unavoidably also claiming that it's impossible for a USB motion controller to be reliable, because it uses USB.

[JAZZCNC]

However...you're not saying the same thing when your words are about USB as a whole. When you claim that USB is not a 'good or suitable connection for reliable Motion control' you're unavoidably also claiming that it's impossible for a USB motion controller to be reliable, because it uses USB.

Twist my words to suite for argument all you like the fact still remains with real world experience in a cnc enviroment using MACH3 with All connection types and just about every Motion control card that works with Mach3. USB is definatlely the one thats given me most unexplained troubles. Ethernet hasn't and that's a fact not theory.!! . . . . . Now I really have done with this pointless argument.!!

[Jess]

USB is definatlely the one thats given me most unexplained troubles.

Keyword here is 'unexplained'; you don't know the cause.

...which is exactly what I've been arguing all along. There's plenty of other things that can go wrong with a motion controller and you've finally admitted that you do not know what the problem actually is.

Thank you for admitting I was right all along.

[cropwell]

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[JAZZCNC]

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[GEOFFREY]

Go ***REMOVED*** some where else you ***REMOVED***

Jazz, it is a pity that you were forced into a slanging match, but I fully understand why. It is generally accepted that you are one of the most informed and helpful members on this forum, and I am a little suprised that you lasted so long!!! I still love you. G.XXX

[JAZZCNC]

Jazz, it is a pity that you were forced into a slanging match, but I fully understand why. It is generally accepted that you are one of the most informed and helpful members on this forum, and I am a little suprised that you lasted so long!!! I still love you. G.XXX

Geoff I'm calming down as I'm getting Older but every now again ***REMOVED*** comes along and pushes the Button.
I honestly Don't give a flying F@@ about him I know what I know thru experience of building machines. It's the others reading his theory and untested conclusions drival that I'm more bothered about and it pisses me off when all I'm trying to do is pass on this experience to save others buying what I know to be more trouble some devices.

I've just come out of workshop after 6 hours of wirng so Maybe it's time for quick Guiness before Bed to Calm me down.!!!

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[Lee Roberts]

Hi,

Jazzcnc, at no point in the discussion did Jess make personal comments about or to you, in the way you have in reply to Jess, please respect other forum members, as rightly pointed out by GEOFFREY, you are a Forum Superstar , we know you for greater things ;-).

I've read this discussion from the start and suggest it's now time to move on to other things more deserving of our attention, though I can understand the points both of you are making:

Jazzcnc, I share the same thoughts as you to some extent on this, as in, who cares what is really going on "behind the scenes" so long as the machine is reliable and doing what is required, something's I picked up was that, motion control units that communicate via Ethernet are typically more costly, have a higher level of sophistication and may have the ability to "hide" any problems that may be occurring, giving the effect that everything is "fine and dandy" when actually it may not be, so some form of investigation may not be a bad idea.

Jess, I share the same views as you regarding "treating the cause, not the symptoms" and I'm exactly the type to investigate further myself before moving to a different technology, however, in some circumstances, it may be a better idea to switch to something else, a few of our members use their machines in production environments, so down time would be a major problem. Moving quickly to an Ethernet based system, to get up and running again sooner, may be the way I would choose to go first.

Thank you both for the things you've contributed so far, yet again I've learnt a little more on the CNC subject, which brings us nicely back on topic!

lateAtNight, have you implemented a solution to the problems your having, if so, what did you choose to do? if not, what are you likely to do next?

.Me