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06-06-2015 #1
Yes I under stand and you shouldn't have to do it I agree completely. But like I say sometimes you have change to cure for your own sanity.!
Last night I Remembered out of the all the cards I've ever tried or used this was the only USB card that came with ferrite rings on the cable. Which didn't bold well.!! Also I remember it was John S who brought this card to my attention and why I tried it.
The card was actually fitted in a machine and run straight away rather than tested on a bench or in machine of my own. It did what lots of Other USB cards do as in work fine then dropout occasionally for no apparent reason that is obvious. Not E-stop or Limit switch triggers but lost communication thru Locking up.
I can't remember if I used a external 5V supply or not as I seem to think it didn't have the option but I could be wrong. If it did then I would have definatly used separate 5v source as USB is terrible at giving a stable reliable 5v. (Jessy don't even go there.!!)
The card is still in the machine and working. I believe it still does the occasional dropout thing but other than this it's worked ok. The guy who owns machine isn't electrical minded or machine savy so any faults or strange happenings he would call me. It does run from a Desktop machine but last I knew he was talking about getting a Laptop so could take in house. I will ring him later and see if any issues I'm unaware of.!!
As mentioned lower down I don't use 5v thru my limits or home switches as it's too prone to EMF. I also don't rely on the Controller for E-stop and Shut things down thru relays.
So if your machine is wired using 5v direct from board thru long wire run for E-stop and/or limits then I'd look at getting 24V supply and putting a resistor on the input. Or changing to a much safer Relay driven setup.
Again shouldn't have to but hey it's got problems and they need curing. Just because Sieg is a big concern and charges the earth doesn't mean they don't penny pinch or cut corners.!! . . . The lack of shielding clearly shows they do.!!! . .
( If it's any consolation I recently converted both Denford and Boxford machines and they where the same.!! . . .Very poor. Only thing in there favor was they used quality electronics, bespoke and tied to there software but quality and they didn't rely on controller for E-stop)Last edited by JAZZCNC; 06-06-2015 at 08:34 AM.
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