- Shortest period to switch off electronic equipent for before switching on - 4 Updates
- EPROMs nearing end of life? - 5 Updates
| Vir Campestris <vir.campestris@invalid.invalid>: Apr 09 06:09PM +0100 On 09/04/2017 15:34, MJC wrote: > Conversely the possibly apocryphal story I heard had the generator > tested regularly. When eventually needed it ran for a few minutes and > then ran out of fuel. The protocol didn't include top-ups! The one I know of is where the fuel pump was on the non-maintained mains. All the tests were fine. But when the power went off for real so did the fuel pump... BTW I use 30 seconds too. 30 odd years of computers here, quite often dealing directly with the HW designers so I could write the tests. Andy --- This email has been checked for viruses by AVG. http://www.avg.com |
| "Benderthe.evilrobot" <Benderthe.evilrobot@virginmedia.com>: Apr 09 07:51PM +0100 "David Woolley" <david@ex.djwhome.demon.invalid> wrote in message news:ocdcd6$mn5$1@dont-email.me... > dirty shutdown. If it were handled by the firmware, it could be difficult > to shut down a battery powered device which had locked up. RESET should be > more gentle than a long press. AIUI: A short press is one way of a normal shutdown - sometimes you have to press it a little longer................... --- This email has been checked for viruses by AVG. http://www.avg.com |
| "Benderthe.evilrobot" <Benderthe.evilrobot@virginmedia.com>: Apr 09 07:55PM +0100 <krw@notreal.com> wrote in message news:sg5jeclipaol2ejgd0tuivrostvvad23bt@4ax.com... >>time for no protection - but it just stresses the components a little more >>than usual. Most user manuals seem more or less unanimous for about 30s. > Only if it's designed by a moron. There's not exactly a shortage of those - but it does tend to be more older designs. It does sometimes happen - pretending it doesn't won't save you. --- This email has been checked for viruses by AVG. http://www.avg.com |
| krw@notreal.com: Apr 09 07:14PM -0400 On Sun, 9 Apr 2017 19:55:27 +0100, "Benderthe.evilrobot" >> Only if it's designed by a moron. >There's not exactly a shortage of those - but it does tend to be more older >designs. IC designers tend to do a better job protecting against weird power cycles and a lot more system designers have been burned and learned. >It does sometimes happen - pretending it doesn't won't save you. Of course. There are morons designing stuff all the time. Worse, there are companies that don't care that they're making crap. |
| jurb6006@gmail.com: Apr 09 10:21AM -0700 >"I just went through three weeks of frustration fixing this machine tool. " I've found that usually corrupt data is caused by the circuitry, not the EEPROM itself. However your unit is old enough it may have actually failed. When things get old, things get weird sometimes. You see extremely uncommon failure modes and sometimes those "gremlins". Where I used to work they bought an EEPROM copier cheap. Maybe twenty bucks, but it could not do everything. It did what we needed but it did say that certain types of chips need to be erased before they can be copied onto. The ones in the equipment we worked on did not need to be erased. These units have a mechanical power switch, so I suspect that sometime the corruption is from turning it off at the wrong time. They are Karaoke players and usually the USB and SD puts became deaf dumb and blind. I had a whole set of them with good data to copy from. I am somewhat surprised you found a used board for that thing. But since you did you probably should copy the data to either the old EEPROM or a new, compatible one for backup. If it happens once, it can happen again. I really hadn't heard of that brad of lathe, but if it has Timken bearing, hardened ways and all that it is probably worth keeping for life. That is if you have a use for it. I used to have two lathes but then realized they had been used maybe once in five years I sold them off. Plus I need the room. |
| jurb6006@gmail.com: Apr 09 10:23AM -0700 >"1) My shop is in Canada - and Fedex/UPS/DHL all charge my shop customs import fees that can reach $40US. We normally have Americans (I am assuming you are in the USA) ship stuff to us by US Post as the import fees (if that happens) is around $7US. " What happened to NAFTA ? Is that only for stuff coming into the US ? |
| etpm@whidbey.com: Apr 09 11:15AM -0700 >These units have a mechanical power switch, so I suspect that sometime the corruption is from turning it off at the wrong time. They are Karaoke players and usually the USB and SD puts became deaf dumb and blind. I had a whole set of them with good data to copy from. >I am somewhat surprised you found a used board for that thing. But since you did you probably should copy the data to either the old EEPROM or a new, compatible one for backup. If it happens once, it can happen again. >I really hadn't heard of that brad of lathe, but if it has Timken bearing, hardened ways and all that it is probably worth keeping for life. That is if you have a use for it. I used to have two lathes but then realized they had been used maybe once in five years I sold them off. Plus I need the room. The lathe is a great machine and a real money maker. When it runs that is. 15 HP spindle. One type of job I do on it, 3 and 5 inch diameter sheaves made from 6061 aluminum, sends the spindle load meter to 120% for each of the roughing cuts. The chips coming off spray the door like a sandblaster. Man, I love hearing that. The Miyano rep told me that they hardly ever need mechanical servicing. The spindle cartridge is designed so that as it heats up it doesn't expand into the machining envelope so there is no dimensional change to parts in the Z axis. Right now I am running a part, also from 6061, that has almost all the material removed. I load 4 foot long 1.25" diameter stock in the spindle tube. 2 inches stick out from the collet. The part ends up being 1.65" long, .25" daimeter but for a .200 thick knurled disc near the middle. After the machining is done the piece is parted off and a parts catcher swings out, catches the part, and drops it in a tray outside of the machining envelope. Cycle time is 47 seconds. Another job I do is cutting an o-ring groove on the underside of 1/4-20 flat head 304 stainless screws. The groove is normal to the 82 degree included angle of the head. The groove edges have a .004" radius machined on them to avoid sharp edges. 7 second cycle time. I'm gonna have to get the EPROMS copied soon as possible. First though I need to get all the late jobs finished. Eric |
| Michael Black <et472@ncf.ca>: Apr 09 02:33PM -0400 |
| John Robertson <spam@flippers.com>: Apr 09 03:24PM -0700 > assuming you are in the USA) ship stuff to us by US Post as the import > fees (if that happens) is around $7US. " > What happened to NAFTA ? Is that only for stuff coming into the US ? Nothing to do with NAFTA. There is no duty, however the couriers still charge $25 to $45 Customs Clearance Fee for carrying the stuff across the border into Canada. Large companies like Digi-Key deal with this sort of thing differently, but for smaller businesses and individuals that clearance fee can be an unfriendly reminder that the Post Office is the best deal for shipping internationally. We don't ship al lot to the US by courier, mostly Post and I haven't heard back from our US customers that they have been charged clearance fees for getting their products. Even the few packages that go by Fedex seem to enter the US without a fee. Grumble. John :-#(# -- (Please post followups or tech inquiries to the USENET newsgroup) John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out." |
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