Team 842 Testing Shots

[s_forbes]

Originally Posted by Mr. Lim

What kind (make/model #) of solenoid are you using?

I'm assuming it's a double acting. What is the center position of the solenoid? A and B both closed? Both to Exhaust? No center position?

Nope.

Here's a part number for you though (see mcmaster): 6124K511

How are you precisely varying the timing of the pulse to the solenoid? Are you just counting cycles in the teleop periodic loop? Does that limit you to about 20ms increments? Do you need anything more precise than that?

So many questions...

This is very cool stuff.

I'll let Sergio get back to you on the pulse control... I'm not sure how fast his program loop cycles.

[rai337]

Hey there, nice job you did there! Looks amazing, and very powerful
We wanted to ask a few questions:
1. What is the length of your chasis?
2. What is the length of your pistons?
3. Is there any specific reason why you put your pistons in such starting angle? Did you find that angle more effective than others?

Good Luck, and see you at the competitions!

[Ether]

Originally Posted by rai337

Is there any specific reason why you put your pistons in such starting angle?

With a motor, you use a gearbox to trade speed for torque.

With a pneu cylinder, you use leverage to trade force for speed.

[Bewizardment]

How are you guys loading the ball? Does the arm go down further?

[Team 2016]

Could this be used to pass or catch?

[nuclearnerd]

OK, we had similar size cylinders, similar sized catapult, and tanks directly connected to the cylinder ports (mechanical release - we didn't even get into large CV solenoid valves yet) and we could not make our shooter make long shots like yours. We clearly have some learning to do. I'm looking forward to seeing more of your system after build season!

[AdamHeard]

Originally Posted by nuclearnerd

OK, we had similar size cylinders, similar sized catapult, and tanks directly connected to the cylinder ports (mechanical release - we didn't even get into large CV solenoid valves yet) and we could not make our shooter make long shots like yours. We clearly have some learning to do. I'm looking forward to seeing more of your system after build season!

A very small difference in the geometry can cause a huge launch difference.

[matthew_martin]

So you used 1.5" bore cylinders, but what stroke did you use? We've looked at a couple ideas, but with our current configuration, ours couldn't fit.

[falconmaster]

Originally Posted by matthew_martin

So you used 1.5" bore cylinders, but what stroke did you use? We've looked at a couple ideas, but with our current configuration, ours couldn't fit.

9 inch stroke