Posted by NCWayne on June 11, 2013 at 06:38:18 from (173.188.169.54):
The Detroit that drives the bale buster I built last year has a heavy solenoid that's used to shut it down. The way it's designed the duty cycle on it is only something like 30 seconds before it over heats. The way I had to design it, the operator moves a lever, that hits a switch, to shut it down, and then moves the lever back to the start point. Basically it works the same way one of the mechanical shutdowns would but the lkever action hits a switch instead of moving a lever on the injection pump. That part works great, and hasn't been a problem. Instead the problem comes in with the safety shutdown part of the setup. What happens is the guys running it will hit one of the shutdown buttons, either intentionally (like when one lost a pitch fork and ran it through the baler), or they'll bump agaist one and shut it down accidentally. In either case they don't think to reset the button immediately after the engine shuts down. As a result they have already burned up two solenoids since the thing was put into operation. Both times could have been easily prevented, given a little thought, but you know how that goes with 'general labor' nowdays.
Ok, my dillema now is to get it rewired so no more solenoids get burned up. My thinking is to put it on a timer so the 'signal' from either the operator shutdown, or the emergency shutdown trips the timer and sends a timed 'signal' to the solenoid long enough to shut things down, but not long enough to burn it up. Basically the timer will need to close the contacts to the solenoid upon reciept of a signal and keep them closed for x amount of time. Once x amount of time elapses the timer will open the contacts to the solenoid and reset internally, regardless of wether the origional 'signal' goes away or not.
I've been looking at the various types of timers available, On delay, off delay, one shot, etc, etc, and I guess I'm missing something because as I read out the operation of each, none of them seem to operate the way I need it to. I know there are a few of ya'll on here that have done some electrical engineering work and I'm hoping one of ya'll might be able to enlighten me as to which one would work in this application. Too, it's a 12V DC setup. Grainger has some 12V timers but they are the only ones I've really been able to find that has them in the DC voltages. Any ideas of anywhere else that might have some rated at 12V DC as most others I have looked at are all AC rated?
Any help or ideas on another way to do this would be greatly appreciated.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
... [Read Article]
Latest Ad:
Oliver 550 Diesel runs like a watch three point hitch pto engine gone threw about two hundred hours ago nice clean tractor
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
