How to keep pneumatics extended from the start

Programming Support VEXcode V5 Tech Support
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#1

I’m trying to make a pneumatics stay exteded from the start of the match to hold a rubber banded thing in place, all the way until the end, when we retract it and launch the extension. Is this possible? Thanks in advance

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#2

Yes, you can. This is a possible and popular way of triggering endgame mechanisms.

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#3

how do i do that? i have tried setting the pneumatics to true at the very start of my program, but it still ends up retracting for split second before extending again.

#4

I don’t have my code on me, but in one of the sections above where everything is defined, I think pre auton?
you can write a little segment around

AirCylinderOne.set(true);

Of false depending on how to have your pneumatics set up. But when air gets introduced into the system it should automatically extend

#5

Try swapping the tubes that feed into the solenoid (A and B)

Screenshot_20221101_075427
Screenshot_20221101_075427668×932 89.4 KB

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#6

i have that in pre_auton, but the piston still retracts when we run the program and then immediately gets extended by the code.

#7

Where do you define your pneumatics? Is it in pre-auton or before everything else (after the #includes)? If so, make sure where you set it up make sure that the parameters when you set it up include “true” rather than “false”.

#8

Try not doing that, and instead do what @EcstaticPilot said, and reference the ports on the solonoid. Those have a default output, and can’t be changed in code. This is assuming you are using double acting pnumatic, if not, you may be out of luck. If possible, could you send a picture of his your pnumatic are weird together? Thanks.

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#9

image
image1920×2560 328 KB

Here is the picture for my pneumatics. They are on by default, how ever when i run the code this happens:
https://youtube.com/shorts/nnCnGPj9o0I?feature=share

#10

I would like to again recommend you swap the output air tubes from the solenoid and you shouldn’t need anything in the code.

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#11

i fixed the problem. it still does what it used to do, but if i fill it up to 35 psi or less it doesn’t release the expansion. thanks for the help tho!

#12

It may be there’s friction. Make sure to fill your pneumatics to 100 psi and you can have up to 2 tanks if you already don’t.