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Unread 21-12-2015, 17:08
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Re: Intake wheel motors

With PG71s, it's hard to get the wheel big enough for a decent tip speed. PG27s are nearly three times as fast. We used a PG-27 with a 6" wheel for our Aerial Assist pickup. For our tennis ball pickup in offseason, we used BAG motors and 5:1 reduction - plenty fast even with a 4" wheel; almost too fast for our purposes (we had a few balls jam inside until we made some adjustments).
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Unread 13-12-2015, 22:25
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Re: Intake wheel motors

Quote:
Originally Posted by jwfoss View Post
When I think about fast robot intakes, nothing comes to mind more then FRC95's robot from 2002.

That being said, the RS775-18V will be greatly missed in the future for its size to power ratio. I'll all for throwing as much power as you can at an intake within the confines of weight and design. Looks like Mini-CIMs, BAGs, and 9015s for the future.
Looked at the date of this post... went "Oh, that was BEFORE VEX announced their new products". I'm now ducking and covering from the hail of RS775-18s flying my way as they're replaced by the VEX counterpart...
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Unread 14-12-2015, 09:48
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Re: Intake wheel motors

At this point, seems like the best choices are between the BAG, the mini-CIM, or the 775Pro.

The BAG is great if you want a lighter motor, don't need a ton of power, but your intake might stall. It's also better if you're trying to watch your current draw as it draws less current than the mini-CIM or 775.

The 775 has a lot more power at a similar weight, so if you can spare the current and don't think the intake will ever stall, it's a great choice.

If you need both power and stall protection, and don't mind the weight penalty, than a mini-CIM is the way to go.

In any case, in this modern era of FRC there is simply no better choice than a VersaPlanetary for gearing an intake. The weight penalty is worth it in exchange for the extreme flexibility in gearing options. Your intake should definitely run through a VP, unless you're very sure of the gear ratio and you need every ounce of weight you can get.
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Unread 14-12-2015, 10:24
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Re: Intake wheel motors

Quote:
Originally Posted by Chris is me View Post
At this point, seems like the best choices are between the BAG, the mini-CIM, or the 775Pro.
...
I concur, but will add that some intakes (depending many factors) will work well with an AM 9015 reduced through a BB P60. This combination saves some space and weight relative to the VersaPlanetary, which might be a good trade against the VP's benefits.
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