Scaling Winch Motor Help

[esatterfield32]

When you scale with this system, does it fall back down after the robot is disabled? Also, how heavy is your robot? We have a 60lb robot (excluding our potential scaling system) and I was curious how many motors we should use.

[esatterfield32]

Originally Posted by MaGiC_PiKaChU

I see you plan on making a similar system to ours.

we had a single 775 from vex at first. i believe geared down 75:1
we doubled that at GTCR, now 2 775s, same ratio.

When you scale with this system, does it fall back down after the robot is disabled? Also, how heavy is your robot? We have a 60lb robot (excluding our potential scaling system) and I was curious how many motors we should use.

[BJT]

Ours is two 775pros on two 49-1 versaplanetaries facing each other with a 3 inch wide 1 inch diameter spool between them. A switchable 1/2 inch rachet wrench keeps it from back driving. its pretty fast.

[Chris Fultz]

You should check out this data from VEXPRO on maximum loading on the VersaPlanetary gearboxes. Be sure you are within the design limits of the gearboxes for the motor / gear reduction you are using.


http://content.vexrobotics.com/vexpr...s-20151221.pdf

[marshall]

Is anyone using BAG motors for winching this year? I'm hearing a lot of CIMs and RS775Pros but JVN's Spreadsheet tells me that it is doable with the BAG motors. Just curious.

[esatterfield32]

with two pg71 motors is it doable? We have two on hand that are gears 71:1 but when we put it in the JVN spreadsheet it says it's going to go too slow, maybe I'm putting the information in wrong..

[Ether]

Originally Posted by esatterfield32

with two pg71 motors is it doable? ...when we put it in the JVN spreadsheet it says it's going to go too slow, maybe I'm putting the information in wrong..

The motor in the 2016 FRC motor spec sheet that is listed as "Mates with PG71 gearbox" is the AndyMark am-2161 RS775-5. That motor's max power is only 37 watts.

See Richard's post#4 in this thread.