Team 449 Climber

[Paul Copioli]

Originally Posted by T^2

Your gearbox will fail you after a regional's worth of matches, maybe sooner. The aluminum ring gear will flex enough to allow the planet gears to ratchet, and you will lose the climb.

Bold words are mine for emphasis.

This is completely false. This is not how the ring gear works in a planetary system. The only load that goes in the direction to cause the gear to flex is the separation forces of the planets, which is quite low even when the gearbox is overloaded. Please do not make claims that look like statements of fact when you have no idea what is actually going on.

Now, I am sorry that you had failures, but I can tell you that a steady climb is NOTHING like catapult and can burglar loading scenarios as those have extremely high shock loads. I an willing to bet that you either had planet carrier failure or a failure of the spline. I would like to hear about the details of your setup and I can pinpoint exactly what failed and why.

We did excessive failure testing on the VersaPlanetary and failed it in ways you can't even imagine. That is how we developed the load rating table and that is why the 10:1 has lower load rating due to the nature of the failures.

Again, I would love to help pinpoint what happened on your can burglar and catapult, but my team used VPs for both applications with exactly 0 failures.

Paul

[lphung]

Nice design. Just a quick question/comment: Is the geartrain's resistance enough to prevent the robot from releasing the rope if the battery runs out of juice? I would consider the event in which your system reaches the top of the rope and needs to maintain its height until the end of the match.

[JamesCH95]

Originally Posted by T^2

Your gearbox will fail you after a regional's worth of matches, maybe sooner. The aluminum ring gear will flex enough to allow the planet gears to ratchet, and you will lose the climb.

Please explain.

This application is within the load ratings of the VP gearbox for this application. I have a hard time believing that they'll have a problem considering how many VP gearboxes my team has run at the edge of what they're rated for (and sometimes past). Suffice it to say the VPs have taken every ounce of use and abuse we could throw at them and still work great.

[bearbot]

Can't wait for district competition event and hopefully will be on the same alliance this year. Good Luck 449 and Wil see you soon on the field soon

[OMGRobots1]

Very impressive. What power was the motor running at?

[qscgy]

Originally Posted by OMGRobots1

Very impressive. What power was the motor running at?

Full power.

[qscgy]

Originally Posted by Kevin Sevcik

You have plans for something to trigger the touchpad before you run into the channel? You'd probably hit the touchpad first tilted sideways like that, but you might not if you went up especially balanced.

Not yet. Ollien's suggestion of sticks could work, as could a pneumatically-actuated bar of some sort. Thanks for telling us this!

[JasdeepSadam]

So does the rope just wrap around around the rod? I was just wondering because we have a similar design and I wanted to know if you had anything special to keep the rope in place and wrapping around while keeping the robot relatively stable. THANKS

[JasdeepSadam]

One more question. What material did you use use for the rod? Did you buy it from AndyMark or McMaster-Carr? Thanks

[Oblarg]

Originally Posted by JasdeepSadam

One more question. What material did you use use for the rod? Did you buy it from AndyMark or McMaster-Carr? Thanks

The rod material is from https://www.competitionrobotparts.com/