Bidirectional tidal flow

[MitchM]

Originally Posted by golf nut

How did I edit your post?

Maybe because we're in the Vendor forum?


Mitch

[sphelps]

Originally Posted by golf nut

How did I edit your post?

haha, get that out of there! I can't remove it

BTW that still wouldn't work as simply as you think. Once the switch makes contact and shuts off the movement what then tells it to move on? You still need a smart relay. And you can't run a cam, is it not sealed to prevent water leakage, it would think it would have to be magnetism which wouldn't react properly with the magnets already present.

[golf nut]

Originally Posted by sphelps

A reed switch works on magnetism, same type of switch you'd find on windows and doors for alarms. Problem is the OM has a thick plastic casing and you'd need pretty powerful switch to work properly and you would have to enclose one end within the drum which offers will space. Plus you'd need two switches for the two positions meaning you'll also need a smart relay to understand the two switches and control the system accordingly. It's certainly not as simple as described and the cost would be beyond $39.

Monsieur MitchM wants 2 directions only, which means he needs one sensor and 2 magnets 180 degrees apart, the timer falls off, the motor turns, the sensor sees the magnet and the timer turns on again, he can drop a small cam onto the upper mag unit if he wishes and install a micro switch in the underside of the motor mount, there are many ways to do it.

[MitchM]

Originally Posted by golf nut

He wants 2 directions only, .....

"He" has a name you know......






(sorry, couldn't say that with a straight face for long...)


Mitch

[schroeder]

I have not checked into this but maybe there is another valve type that you could use.

I do service work on commercial dishwashing equipment. These machines sometimes use a valve that has a servo actuated diaphram to close 1 outlet (say the outlet to the wash arms) while opening the other (the drain).

They typically have cast ABS or PVC bodies but I cannot attest to the materials used inside the valve. I can however guarantee that they are under $250 and usually operate on 120V.

I'll try to get some contact info at work tomorrow and post if I find anything out.

[Lampshade]

There's small PVC valves on washing machings for the fill cycle, cheap, but only 1/2" opening.

Using a OM with a timer as suggested earlier would eventually give bad timing...BUT... you can do it without a PLC. Just get 2 adjsutable timers (like Panasonic PM4H), a relay, and a windshield wiper motor. Windshield wipers have a home sensor, or auto off switch. Most have them now unless it's off a 67 VW or something, i used a rear wiper off an aerostar for something similar, cost $10 from a wrecker. If you set timer 1 to run for 15 sec on (or whatever it takes to open). then off for timer 2 amount (your Open time). And On again to home position to reset timer 1 again.

[golf nut]

Originally Posted by Lampshade

There's small PVC valves on washing machings for the fill cycle, cheap, but only 1/2" opening.

Using a OM with a timer as suggested earlier would eventually give bad timing..

Strictly on a timer yes, but eventually it would come back in sync again, I never recommended for anyone to do that, unless they wanted even more random flow

[golf nut]

Originally Posted by Lampshade

There's small PVC valves on washing machings for the fill cycle, cheap, but only 1/2" opening.

Using a OM with a timer as suggested earlier would eventually give bad timing...BUT... you can do it without a PLC. Just get 2 adjsutable timers (like Panasonic PM4H), a relay, and a windshield wiper motor. Windshield wipers have a home sensor, or auto off switch. Most have them now unless it's off a 67 VW or something, i used a rear wiper off an aerostar for something similar, cost $10 from a wrecker. If you set timer 1 to run for 15 sec on (or whatever it takes to open). then off for timer 2 amount (your Open time). And On again to home position to reset timer 1 again.

I stay away from unreliable sources when I buy components for any OM unit, sure I can buy from E Bay, wrecking yards,and garage sales, but it isn't going to happen, I deal direct with OEMs for motors and magnets, the balance we produce in house, in the video provided. I am using the exact $39 timer I suggested a few pages ago, same principle that according to Mr Phelps would not work, I use an $8 sensor from Digikey to sense a magnet at each of four locations (home position)to trip the timer,reducing the number of magnets to just two would do exactly what MitchM required, the timer is set for around 7 seconds, it can be expanded to 8 hours if required.

http://s1008.photobucket.com/albums/...t=DSC_0263.mp4

Paul

[lastlight]

That is pretty darn cool. Do you have plans to develop this into a more refined product?

[sphelps]

Originally Posted by golf nut

I stay away from unreliable sources when I buy components for any OM unit, sure I can buy from E Bay, wrecking yards,and garage sales, but it isn't going to happen, I deal direct with OEMs for motors and magnets, the balance we produce in house, in the video provided. I am using the exact $39 timer I suggested a few pages ago, same principle that according to Mr Phelps would not work, I use an $8 sensor from Digikey to sense a magnet at each of four locations (home position)to trip the timer,reducing the number of magnets to just two would do exactly what MitchM required, the timer is set for around 7 seconds, it can be expanded to 8 hours if required.

http://s1008.photobucket.com/albums/...t=DSC_0263.mp4

Paul

Actually my comments where based more on clarification and trying to understand exactly how the system would work and to be sure it would work. I made it clear exactly what would be needed to make the system reliable and if you read the thread it was you who failed to provide the information I asked for, I actually repeated questions multiple times.

Originally Posted by sphelps

For the system to be reliable a simple a delay won't work. If it's an over ride that's a pretty cool little system. How much would the whole system cost, built and ready to go?

I'm also a mechanical engineer who works in automation of manufacturing equipment but I do however appreciate your efforts to drag my name through the mud. In the past I've installed half a dozen of your units on clients tanks based on my recommendations as well as recommended them to many others when the application fits. I won't be doing that anymore.