pic: coupling for dual cylinder ballshifter

[tag_groff]

loading photo ...

[Knufire]

Are you planning to 3D print it?

[Lexlukener]

Yeah!, We already did and mounted it looks great and we will be able to test it tomorrow

[AndreaV]

What's the reason for making this?
Need more oomph to shift, or maybe multiple positions?

[cbale2000]

Originally Posted by AndreaV

What's the reason for making this?
Need more oomph to shift, or maybe multiple positions?

How would you accomplish more than two positions with two cylinders? If they have different strokes, won't one just fight the other (not to mention cantilevering the coupling)?

If this for extra shifting power though, I would like to know what application it's being used for that requires a second cylinders to accomplish.

[EricH]

Originally Posted by cbale2000

If this for extra shifting power though, I would like to know what application it's being used for that requires a second cylinders to accomplish.

Betcha they're trying to shift a winch from windup to FIRE! and one cylinder wasn't cutting it. That was a pretty hot topic of discussion a week or two ago.

[donkehote]

Originally Posted by EricH

Betcha they're trying to shift a winch from windup to FIRE! and one cylinder wasn't cutting it. That was a pretty hot topic of discussion a week or two ago.

Paul Copioli said it would theoretically still neutral with a 400 lb winch, but so far as I know, no one has actually tested this yet. I would love to see some video (or at least pictures) of someone using the standard piston and having it NOT neutral.

[tag_groff]

Originally Posted by donkehote

Paul Copioli said it would theoretically still neutral with a 400 lb winch, but so far as I know, no one has actually tested this yet. I would love to see some video (or at least pictures) of someone using the standard piston and having it NOT neutral.

we were doing it with only a single piston at 60psi. we ended up having to up our regulator to even test. That is why we added the second cylinder. It works marvelously.

[IceStorm]

Don't suppose that you would be willing to share the cad files for this. Or offer to print another one for a small price? We were having the same issue last night testing our winch.

[tag_groff]

Originally Posted by IceStorm

Don't suppose that you would be willing to share the cad files for this. Or offer to print another one for a small price? We were having the same issue last night testing our winch.

https://www.dropbox.com/s/4mveor2l36...oupling.SLDPRT
just print 2 and they mesh together

[Cash4587]

Do you care to share the mounting plate as well?

[AndreaV]

Originally Posted by cbale2000

How would you accomplish more than two positions with two cylinders? If they have different strokes, won't one just fight the other (not to mention cantilevering the coupling)

Ah right, you can accomplish two different positions with two cylinders, but not if it is mounted to he same coupling. Yes, if they were different length strokes it would probably just shatter the coupling.

Long day of troubleshooting, must sleep.

I am surprised the ball shifter would need a 2nd piston based on Paul's (theoretical) math, but the extra help won't hurt and it's still nowhere near the force needed for a dog gear. Much more compact than a big bore cylinder and a lever arm!