On Wednesday, June 06, 2012 02:42:53 PM David did opine: > Hi all, > > On Tue, 5 Jun 2012 11:24:16 -0400 gene heskett wrote > > > As to being able to retrofit a good governor to a fleabay generator, > > I've no clue how co-operative the makers are when the unit is getting > > long in the tooth as I've never needed to try. Today, I'd be > > inclined to make it out of a UPS running one of those atom boards, > > running linuxcnc, driving a stepper attached to the throttle, > > probably at 5% of the cost of buying the makers stuff. The encoder > > watching a phase, the PID module doing the controls through a stepgen > > module, sure seems like the avenue to take to me. If a 60 hz crystal > > clock can be sourced, one could even phase lock to that. > > When I was in television we were pestered by the "Barber Coleman" > salesmen seeking sell an upgrade package for whatever standby > powerplants were being used. > > System worked by a hall effect device running on the starter motor ring > gear producing a square wave input for the controller. Output was a > solenoid type device to the throttle. > > Response was tweakable fast/ poor waveform, slow but good waveform. > How could it possibly diddle the throttle fast enough to ding the waveform? That doesn't grok.
> They didn't get very far as the standby units were being upgraded/ > replaced with higher capacity units with same controller. This tx, being one of the original dual klystron GE models, was by then getting long in the tooth, and because to the energy bill to run it, was being considered for a pulser kit, but those came and went in about 5 years time because the whole kit was being replaced with klystrodes, which could be 20% more efficient. So replacing that whole transmitter with a klystrode model made financial sense 3 or 4 years down the log. That would have made that 335 comealong big enough, so I expect it is still there, doing its 30 minute exercise run a week. And, if no one has messed with the starter battery maintenance charger I built, that same pair of 220 AH 12 volt truck batteries is still turning it wrong side out when the starter solenoid kicks in. I'm serious, that thing fired on the first cylinder to hit TDC, and rocked about 6" on its mounts, reaching 1800 revs from dead in 2 seconds or less. If the lights went out, the 500 watters in the tx room ceiling fixtures didn't get a chance to go completely out. That tx had latched relays, with recycle timers set at about 5 seconds, so any power failure was a 5 second off & right back on, at reduced power if the generator was running and the transfer switch was in generator src position. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> Objects are lost only because people look where they are not rather than where they are. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
