Thread: Solenoids
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Unread 23-06-2002, 23:47
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#0047 (ChiefDelphi)
  
Join Date: May 2001
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Re: double solenoids...
Posted by Josh at 1/29/2001 12:47 AM EST


Engineer on team #419, Rambots, from Wentworth Institute of Technology.


In Reply to: double solenoids...
Posted by Anton Abaya on 1/28/2001 11:46 PM EST:



: : Is that what they're supposed to do? I couldn't figure out how to work it.

: : Patrick

: : : Has anyone been able to control the double solenoids so that you can control how far the pistons go out.

: : : Thanks alot,

: : : Alan

: umm, Josh on 419 should know this, but I do know that the double solenoids allow a piston to move up and to move down...

: err soemthing like that...

: wanna answer this one joshie?

: -anton

From what i can get out of the instructions: the double solenoid is used as almost a lock for the piston. In a single solenoid, the electicity opens the gate so that air flows out of the piston and the piston can drop. When the electricty is released, the gate is closed so the air leave. But the piston can still be moved because of the low preasure in the chamber

The double solenoid then provides a continual preasure to one side. so that even when the electicity is off, the preasure in one side is still high. When you give it another shock, instead of just opening the gate, it allows the air out of one side, and allows the compressor to pump air into the other side, locking the piston in the other direction imobilizing it. it will lock in either the up or down direction dependign on what valve in teh double solenoid is open.

I know it's a little confusing, i have to run some tests on it yet to make sure of it myself. i'm pretty sure the double solenoid doesn't actually control how far a piston reaches, just where it's locked in place. If i find anything different, i'll pots it here.

Oh, and if your trying to wire them up, they REQUIRE the two diodes that are shown in the wiring diagram in the manual. If you don't hook it up right, you won't get them to work. and make sure you have the diodes in the right direction, they ARE polarized, the little band on them shows which side is positive (it's indicated by the line on the triangle in the diagram.)

HTH

Josh
Team 419
Yes, i can be serious sometimes.
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