Hydraulic delay circuit

[katoomed00]

You might look into hydraulic proximity switches. I only have experience with pneumatic ones and seems to me the hydraulics ones would work just as well.

 

[oldnslo]

Oldnslo- Were you able to clear some cobwebs about a delay circuit or do you think an action on then action off might work. What I mean is think of a box passing by a sensor in this case it would be a trip lever and after the box passed it would trip another lever. First lever would extend the cylinder and the second would retract the cylinder. Definitely a brain twister.

Problem with anything mechanical is the delay function unless the table is always empty when the tilt cylinder / table gets to a certain point. The a mechanical lever or cam operated valve could be used. Just have to figure out how to maintain the flow path during the cylinder stroke and then unload the pump at end of stroke.

Is the delay not needed or were you trying to limit the number of cams or levers you need for the operation.

 

[RPW]

Basically what is taking place is when the table is full it tilts to dump the contents in an accumulated state (it's hay). I don't know how long it will take to dump the contents. I've given some thought to using an SA cylinder but don't know if the table would return fast enough In time for the next bales to start loading onto the table.

 

[jenkinsph]

I would think a cheap photo cell setup as used on garage doors should work to detect when the table is cleared. This would allow you to use simple solenoid valves to operate the table. Might need a few well placed limit switches too.

Timing may work as well but if for some reason the table does not clear a photo cell would stop the operation indefinitely until the table was cleared.

 

[Leejohn]

I know you guys are talking hyd,but what about a spring loaded table and have the spring adjustable so you set it for the load you want.

 

[oldnslo]

RPW,
Since this for hay will it be sitting stationary or being pulled behind a baler?

Likejenkinsph says electrical would be relatively easy if explosion proof or fire hazard isn't an issue. If explosion or fire is a concern then electric gets significantly more expensive.

Could some type of lip or lever be installed on the table that would trip as the hay passes over it and then be spring loaded to return home once the table is empty? If this could possibly be tied to a mechanical valve to return the table to the home position.

 

[RPW]

Pulled behind baler. Electrical is possible but not always available. Example if I borrowed my neighbors tractor an electrical connection isn't available so that is why I'm looking at a hydraulic solution if possible. Also trying to keep it simple.

 

[oldnslo]

What supplies the hydaulic power to this collector tilt table? Tractor hydraulics or external power source?

 

[aczlan]

Do you have a picture of this beast, or a make/model number?

Aaron Z

 

[RPW]

Was planning on tractor hydraulics as the PTO will be used for the baler. So far it's still a picture in my head.