Impossible to say definitively what caused it without exact wiring schematic that is in place.
Does it purport to be isolated system?
Al.
Impossible to say definitively what caused it without exact wiring schematic that is in place.
Does it purport to be isolated system?
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
Al, now you mention it, it's buffered, not the same thing...
Like I said, it wasn't 5V that fried it, it was high voltage for sure... Unless I have a bad 5V PS???
Just pissed me off after spending a couple of hours setting up and squaring everything... Ended up making them by hand anyway...
I'll do an autopsy when I'm less disgusted at it...
CR
looks like everything is on sockets so an ez fix.
The passive componets look ok from the photo
cheap pc is ez
the bob looks super ez as its just a few chips into sockets
wish all the repairs i have done were all that ez
Agree with COD need to explore the cause and that maybe the hardest to find
Since it's only a $30 breakout board, I'd probably just replace it as well.
Gerry
UCCNC 2017 Screenset
[URL]http://www.thecncwoodworker.com/2017.html[/URL]
Mach3 2010 Screenset
[URL]http://www.thecncwoodworker.com/2010.html[/URL]
JointCAM - CNC Dovetails & Box Joints
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(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
Sockets or no sockets, makes no real difference since probably there is more damage we can's see in the picture. Probably the BOB is badly burned and must be replaced as well. The very fact that more than one chip is blown indicates that there is a serious damage underneath.
https://www.youtube.com/c/AdaptingCamera/videos
https://adapting-camera.blogspot.com
It's a simple 2-layer board, so any damage would be easily detectable and repairable. But there is a good chance that nothing besides the chips themselves has been damaged.
On the other hand, it depends on your electronics skills. I personally would repair this board, to someone else it might be easier to get a new one. Nothing wrong with that.
The fact it seems to have affected all the IC's, where was the 5v for the BOB originate from?, if from the PC, normally the supply is referenced to ground, if it was a separate SMPS then I would suspect that as the cause.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
if the board was damaged the first time the power was switched on
I would expect either
1) the BOB's 5V supply was reversed or
2) the 5V supply is faulty or you had a stray connection to another supply
unlike many other breakout boards the C10 only uses part or each of the four 74ACT245 octal buffer IC to avoid over loading them
the diagram was traced from online photos to make it easy to see what the various jumpers did
John
Last edited by john-100; 02-19-2017 at 05:29 PM.
Resurrection of a CNC Machine!!!
I ordered a cheap FeeBay, USB powered BOB, PIA, needs a 12-24 supply to turn on the isolation chips???
So I ordered another C10 from Automation, the same style with the chipped buffers, they send me V.11, with SMD's, crap! It also has a Male DB25 header instead of the female of the earlier version..
I find a 25 to 25 male to female in the junk box, 2 actually, can't get the rig to do anything.... Mind you, everything is the same, with the exception of the PC, BOB and cable. I tried one laptop, was acting funky, fiddled with it probably too long, the 2nd laptop seems to be looking better, still no motion. Bob is enabled, and also green led status, good voltage on the drivers, motors lock up, double triple checked wiring, actually just moved them from old bob to new, looked over settings in Mach3.
The only thing that looks odd to me is the cable, pins 18, 19, 22, etc, have no continuity, don't remember exactly, but drawings say these are all grounds?
I'm guessing thinking that maybe the bob needs these to reference the signals???
Great now that Radio Shack went belly up, try and find a cable locally...
CR
hi there
your board saw high ac voltage, to pop every ic, thinking you got hit with lightning with that kind of damage.
suggest you check power supply output for acv and dcv , 0v to power and chassis to power.
check your power plugs as well, make sure your neutral and hots are in the right place have seen hot on chassis do some bad things.
Thanks for the sugestion, first thing I did. Looks the original problem was that the bottom of the board arced off something. BTW, this was an up and running machine for a good while.
CR
if the new surface mount version of the C10 BOB is electrically the same as your original BOB
the printer cable has to have pin 18 connected to enable the outputs when the BOB is connected to the printer port (or a motion controller replicating a printer port)
to enable the outputs the board needs +5V being connected to the enable terminal and pin 18 being connected to pins 19 to 25 via the printer cable
the IBM printer parallel port has pins 18 to 25 connected to the power supplies black 0V wires that are also connected to the mains earth/ground
IBM printerport with centronics 36 way & 25 way D-type connector details
full address decoding not shown
John
PS
I expect the green LED is a +5V supply indicator instead of the red LED on your original C10
PPS
after looking at the new C10 online it lookes like its possible to add a jumper to ground pin 18
the link will defeat part of the C10's enable circuit
Last edited by john-100; 08-23-2017 at 09:21 AM. Reason: add simplified printerport circuit & PPS
Don't use same buffered bob , use an bob with octocuplers , and there will be galvanized protection to pc .
Well this is what I got....
Sent a note to Automation Technology, not very helpful, they send you to CNC4PC, really weird. Got no reply from them, went on CNC4PC website, did a chat with the tech, not helpful at all, basically our boards are never bad, it's your problem was the end result. It may very well be my problem, but give me some kind of way to prove it one way or another guy??? Really PO'd, put a claim into paypal, John from Automation called me, (with a Louisiana area code?) and refunded me the cost of the board. So I guess the customer service is good, just the support sucks...
The thing is, I didn't order a SMD board, they don't even list it on the webpage, I ordered the same as the one I blew up so I would be sure there's no issues, they don't make it anymore. I assume nothing from these companies, they can't even get the documentation straight on the 5056 driver's, the dip's are opposite, and they don't even have the correct documentation for this rev of board, I had to get that from CNC4PC...
So I still have nothing moving...
Anyway, I need to test the LPT and make sure all the signals are going through the BOB. I did a search and found a pretty slick way to do that...
Testing a LPT Port
Basically your going to assign the spindle on/off to each output pin, and check that the voltage toggles, then test each input to ground and check the diagnostic screen in Mach....
BTW This bob has a green LED that when the EN has 5v and the LPT is plugged it goes green, indicating that the watch dog is present, but I did buzz the cable also...
CR