Has anyone experienced a USB stick locking up PC based Fanuc

[Leon82]

It seems to be static shock related but sometimes when we insert the USB the control freezes and need to have the breaker turned off to restart

 

Touching the USB to the edit key seems to ground it but sometimes you forget and really should not have to do that. 

 

Is there a proper industrial USB to use? 

 

[cncappsjames]

On 2/15/2020 at 6:06 AM, Leon82 said:

It seems to be static shock related but sometimes when we insert the USB the control freezes and need to have the breaker turned off to restart

 

Touching the USB to the edit key seems to ground it but sometimes you forget and really should not have to do that. 

 

Is there a proper industrial USB to use? 

 

Alrighty... we've run into this at one single customer. It was a SERIOUS b***h to track down the problem too. I won't go into every test we performed, just the one that gave us the repeatable behavior; I took an air filled balloon generated a bunch of static electricity with the hair on my forearm, charged up the USB stick good, and boom. Control locked up tighter than a gnats *** stretched over a bass drum every single time.

Bottom line, it's a grounding problem on your machine's power connection. You are either grounded at the panel incorrectly, there is some sort of grounding loop, or you're not grounded at all.

I know you probably don't want to hear that but we've got DOZENS of MX's in the field and this is the ONLY one with the problem and their grounding was unorthodox frankly. I was dumbfounded when I saw it.  

 

HTH

[htm01]

we put USB extender with 4 ports, that way we don't wear out the machine port,

maybe less static away from control and 4 port is plastic case

[Leon82]

Ok, I will investigate that a little further.

 

The replace the motherboard on this particular machine it was only a couple weeks old.  It runs back to the pannel as it is too many kva for the bus bar

[cncappsjames]

Best mode of communication is Ethernet, next is CF Card, then USB. USB isn't great even on a PC.

Every once in a while I get USB sticks that I just throw in the trash because they suck so bad. Take forever to get seen, slow transfer rate, refresh is sketchy, etc...

 

So your facility's electrical system has already caused an issue with the machine @Leon82? 

[Colin Gilchrist]

1 hour ago, Leon82 said:

Ok, I will investigate that a little further.

 

The replace the motherboard on this particular machine it was only a couple weeks old.  It runs back to the pannel as it is too many kva for the bus bar

This for sure sounds like a power issue. I'm with James on this. 

https://www.plantengineering.com/articles/fundamentals-of-grounding-and-bonding/

https://electrical-engineering-portal.com/9-recommended-practices-for-grounding

How much impedance are you measuring on your ground circuit? Do you have individual grounding rods driven for each machine? (Most shops skip this, and ground through the building steel, but this requires more building preparation. This is often overlooked.)

 

 

[Colin Gilchrist]

Some useful information about machine grounding:

https://ground-perfect.com/cncmach.htm

https://ground-perfect.com/deepearthpaper.htm

https://ground-perfect.com/pqdrive.htm

https://ground-perfect.com/transfer.htm

[Leon82]

1 hour ago, cncappsjames said:

Best mode of communication is Ethernet, next is CF Card, then USB. USB isn't great even on a PC.

Every once in a while I get USB sticks that I just throw in the trash because they suck so bad. Take forever to get seen, slow transfer rate, refresh is sketchy, etc...

 

So your facility's electrical system has already caused an issue with the machine @Leon82? 

I'm not sure if it caused it. There may have been another bug associated with it. I'm going to let my boss know.

 

The guide I machines only have USB. Ihmi have cf and USB

[Leon82]

I'm pretty sure the machines are grounded to the ground bar in the Siemens panel. Some are on a bus drop which go to the same service I think. 

[cncappsjames]

12 minutes ago, Leon82 said:

I'm pretty sure the machines are grounded to the ground bar in the Siemens panel. Some are on a bus drop which go to the same service I think. 

I would almost put some money down on that being a major source of the problem. 

 

[Leon82]

2 minutes ago, cncappsjames said:

I would almost put some money down on that being a major source of the problem. 

 

I'm talking about the green wire that runs from the 3phase. There aren't any other grounds I'm aware of

 

[Colin Gilchrist]

54 minutes ago, Leon82 said:

I'm talking about the green wire that runs from the 3phase. There aren't any other grounds I'm aware of

 

You'll likely need to engage a specialty electrician. To find ground faults take as special low-resistance ohmmeter.

I bet if you were to measure the voltage between your USB Drive "housing" (metal clip), and the Ground Circuit of the machine, that you are getting voltage there.

https://ground-perfect.com/pqdrive.htm

Most electricians do not build ground circuits that are robust enough to handle a shop full of machines.

[crazy^millman]

Best practice is to run a grounding rod right next to the machine right next to the control panel and ground each machine independently of anything else or other machines.

[mike93]

this will give you the chance to set up FTP instead of dragging and dropping to usb it will be in machine.

the coolant comes out about 1 inch high out of the coupler thing .

[Leon82]

13 minutes ago, mike93 said:

this will give you the chance to set up FTP instead of dragging and dropping to usb it will be in machine.

the coolant comes out about 1 inch high out of the coupler thing .

They ran a line for the first machine, but I guess they decided not to do it

[Leon82]

I reported what I have read in this thread to the bosses.

The guy who is magneto and it happens to the most even said at his old place the machines were grounded with a rod thru the floor.

 

The mx are bolted down but I don't think it goes through the actual floor.

 

[cncappsjames]

"magneto"