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#1
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Re: How to use multi-positioning?
Chris Fultz and I sat down last year with a proposed idea on these Forums for multi-positioning, and made it work. There is a white paper here:
http://www.chiefdelphi.com/forums/pa...on=DESC&page=3 7th down on the page If you have it figured out, this may not help much, but it really worked for us. |
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#2
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Re: How to use multi-positioning?
So has anyone mad much luck using the magnetic switch things to make the cylinder stop somewhere along the length? Like we are looking at using such a system for autonomous stuff, and I would like to have two pre programmed stop points along the cylinder so we would essentially have four different positions we could put it in.
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#3
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Re: How to use multi-positioning?
Quote:
Quote:
If the cylinder wern't using flow controls and was moving too quickly then you might have issues with the reed switches never seeing the piston go by, but as long as you had it at a reasonable speed this shouldn't be a problem. I wouldn't try and use reed switches combined with multi-positioning in order to operate something during autonomous because it wouldn't be all that accurate or dependable, instead I would say you would want to use actual three position cylinders. |
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#4
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Re: How to use multi-positioning?
couldn't you use a needle valve with a servo to control the flow rate and their for control the length but limiting air going to it
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#5
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Re: How to use multi-positioning?
As I said last year, 2 double acting solenoids, one to control the actual piston throw, make that solenoid's exaust common, as in put fittings on the EA and EB ports, T them together, then put it through a pilot controled check valve. On solenoid 2, plug either port A or B, and then control the check valve with the solenoid. It works in the most brilliant way. I've done it, and it works great. Either that, instead of staging a piston like this, just find where you want to stop the piston in mid throw, and get 2 pistons that equal the total throw you want, with one the place where you wish to stop, the other is the whole stroke.
ivey |
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#6
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Re: How to use multi-positioning?
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Granted you could hack the servo...or gear it up...but you would probably lose the high resolution that I'm guessing the was the draw to using a servo in the first place... Hope this helps -Bill |
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