Alternate Construction of Climbing Element

We are trying to come up with an alternate way to build a field element for climbing. We do not have a permanent place to store the element as designed.

Our field build team would like to ask if anyone can share the high and low points of the bar and angle for the Field Generator grab bar? Big Thanks!

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Page 16 of the manual. Max off balance is 14.5 degrees from horizontal.

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Consider that material used for the bar itself should match actual field spec. Thus eliminating surprise of different CoF from what we have been climbing on.

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The above with three climbing bars : straight and max angled up and max angled down and see how each climb angle differs , at game heights

What is the actual field spec for the bar? I know the practice field is for steel.

I haven’t found it yet actually. Looking at past field setup guessing extruded alum. tube but don’t no for sure. It will make a big difference if you plan to move or even stay in place if bar is tilted.

The field uses Sched. 40 aluminum pipe, 1-1/4" nominal, so it’s the same 1.660" od and 0.140" wall thickness.

Someone better double check my research, but I did look it up.

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And this is why it might matter.

That’s what i saw when I read the manual (section 3.3.2).

Doesn’t that mean if you practice on steel it will be harder for your robot to stay still (assuming you have an aluminum mechanism)?

Probably harder, almost certainly measurably “different”. That might be good or bad, depending on what your team considers hard.

OP, I’m planning to recommend local “low resource” teams use the back side of the shooting goal for climbing practice, with the 3 heights & angles you’ve suggested.
See if you can link up with a higher resourced local team to try to dynamic balance, but you don’t “need” your own to get 95% of the way there.

Exactly. If you want to make life easy on yourself, use an aluminum pipe.

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Slightly off-topic since it’s the opposite of what the OP is looking for but we built two alternate configurations, let me know if you want any more details. We thought we were being clever with the pipe version, but it broke exactly where you might expect. So we scraped it and built a wood version.

[Edit: Uploaded images here directly…]






Google Photos Album

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You’ll need to change your Goolge Photos settings for those to show up to allow public sharing / anyone on the internet to view

Just to confirm the pole material on the “real” field drawings, it’s aluminum, Sch 40, 1-1/4" nominal.

It’s also defined in the game manual:

From the Arena section 3.3.2:

Each SHIELD GENERATOR has one (1) GENERATOR SWITCH per ALLIANCE. A GENERATOR
SWITCH is a 7 ft. 6 in. (~229 cm) wide, 10 ft. 1½ in. deep (~309 cm), and 4 ft. 6 in. (~137 cm) tall
assembly that swings from the top of the SHIELD GENERATOR. Each GENERATOR SWITCH has a
HANDLE. The HANDLE is a structure that consists of a RUNG and the supporting structure below the
horizontal beam of the GENERATOR SWITCH. A RUNG is a 1¼ in. schedule 40 aluminum pipe (1.66 in.
(~4 cm) outer diameter) with two (2) exposed 4 ft. 7⅝ in. (~141 cm) long sections.

From the Glossary:

RUNG a 1¼ in. schedule 40 aluminum pipe (1.66 in. (~4 cm) outer diameter)
with two (2) exposed 4 ft. 7⅝ in. (~141 cm) long sections.

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We made an alternative adjustable climb element for prototyping (it has various holes at the right locations on the side planks, and we stick the aluminum bar in the back through them):

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We went a little different direction on the generator switch.

We build at a local manufacturing company, one of our major sponsors. One condition of this set up is our utilized space has to contract at the end of build time to allow for their daily operations. The shield generator is BIG. To minimize our footprint we decided to not build the entire structure. We have enough carpet to replicate one half of the field, this year we have it set to 15 x 60 and roll it in every night, we park the switch next to the carpet to practice our climb.

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