On Friday, 3 June 2022 13:32:05 EDT Dan Bloomquist via Emc-users wrote: > Peter C. Wallace wrote: > > On Fri, 3 Jun 2022, Dan Bloomquist via Emc-users wrote: > >> Date: Fri, 3 Jun 2022 09:26:13 -0700 > >> From: Dan Bloomquist via Emc-users <[email protected]> > >> To: "Enhanced Machine Controller (EMC)" > >> <[email protected]> > >> Cc: Dan Bloomquist <[email protected]> > >> Subject: [Emc-users] 'hm2_7i92.0.7i77.0.0.output-10' does not exist > >> > >> Hi All, > >> I have a 7i92 7i77 combo driving our mill. I flashed it with servo > >> stuff when I installed it. My son and I had been milling parts for a > >> few days. This morning when I booted up I got a strange error and by > >> power cycling the mesa boards, everything came up fine. We were > >> running for a few hours and after a part and tool change we got a > >> joint following error and it turned out that no joint would move. > >> After recycling the mesa power I could move joints, but in less than > >> a minute, errors, like serial errors and timeout errors. So, tried > >> it > >> again and now I could not bring Linuxcnc up. It got to: > >> > >> hm2/hm2_7i92.0: registered > >> ./hm2-servo7i77.hal:95: Pin 'hm2_7i92.0.7i77.0.0.output-10' does not > >> exist > >> Shutting down and cleaning up LinuxCNC... > >> > >> I have a feeling it is the 7i77 from what I've read, the serial port > >> on the board died, but I don't know how to check it. This setup has > >> been running fine for some 5 years. > >> > >> So I was just going to order a new set of boards this morning, but > >> they are out of stock! I see there are other board that might work, > >> but I'm not sure. > >> > >> Thanks for any help. > >> Best Dan. > > > > I would first verify both the 7I77s 5V supply voltage and Field I/O > > voltage. Issues with either will cause loss of sserial > > communications. > > Also check the cable connections between the 7I92 and 7I77. > > > > Can you list all error messages? Starting LinuxCNC from the command > > line will allow all the error messages to be looged on the console > > where they can easily be copy-pasted > > Hi Peter, > Thanks! I didn't know the 24 volts was required. I had only checked the > 5 volts for noise. That was from the command line but all the stuff > above. ..hm2/hm2_7i92.0: registered.. > Was clean. > > So, sure enough, no 24 volts! So I'll have to hunt down why that went > flaky. It comes from the rack of the original machine. Very well built, > but it is old. > Best, Dan.
>From an oldtimer who is also a CET: Look any fuses in the original supply over, either with an ohmeter, replacing anything over 2 ohms, or with a very strong magnifying glass, looking for stress fractures of the fusible element. Old fuses have expanded a wee bit and sagged, until they break a hairline fracture but it looks like a good fuse at a cursory glance. Any fuse that serves in a circuit passing more than about 25% of its rating will eventually fail while looking good, but its fractured and broken on a real close examination. An argument could be made (if the fuse is in the line power part of the circuit) to place an ne2 neon lamp, in series with a 56k 2 watt fireproof resistor across any fuse holder found to be hiding such a failure, so if it breaks again 10 years down the log, the ne2 will tell you its failed by lighting up. But it won't be passing enough current to be a threat to a human. Cheers, Gene Heskett. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
