The Versa planetary units do not show an option for Hex in and Hex out. I do not know if the Rev Ultra gear box has the 1/2" hex or the mounting pattern for the Falcon Sport. Any suggestions?
AndyMark sells a bevel gearbox designed to mount to a Sport.
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I 3d printed a version of this when they were out of stock. It does work well, I had a redline motor on a sport planetary hex output gearbox, just needed some spacer plates.
Even 3d printed the gears.
Just note that this gearbox is not necessarily a good option for high torque applications like the shoulder joint of a long arm. I designed a couple of these in last year and they broke almost immediately when we tried to move the arm. This may have been partially due to poor alignment and deflection on the input shaft, but the gearbox is also designed for lower torque applications.
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We may use the pass through version. It is for rotating a arm about 270 degrees. We have the motor geared down. Started with a belt driven then went to a chain drive. We just have alot of “play” or “slop” when the chain goes from Drive side to driven side tension. This happens at around the Straight up location. Lots of issues with bounce at point of pick up also.
How big is the arm and how much do you have the motor geared down? We had I think a 100:1 ratio on a NEO going into each of these gearboxes. It held fine when we first put it together, but when we tried to run the arm the gear teeth snapped. Don’t really know the weight/moment of inertia of the arm, but it was about 3 ft long in that configuration with 4 pieces of 2x1x1/16 Al tubing.
The arm is 24" long, one tube with a rack and pinion end effector tool. The kids ran the numbers for required power. The motor is geared down to 60:1 or ?? close to that. The software team limits the rpm. We have all the torque needed, we may increase the gear ratio to help the software team out. I am also concerned about the one review online “too much slop in gearing, needs tighter tolerances”. The entire reason we are doing this is to limit the bounce when trying tp pick up cones / cubes.
We may get one unit to test it.
That does sound lighter than ours. I think part of it is figuring out how to space the axles so that you have a proper mesh since you’ll need to put spacers on the shafts. I think @NathanNFM had done some empirical testing to determine the strength of the gears, but I don’t recall what exactly the results were. I don’t recall feeling a lot of slop in the gearboxes when they were assembled, although that’s probably exacerbated at higher loads and that’s just from moving them by hand.
The MAX 90 has a socket 1/2in hex input and 10-32 clearance holes on the input plate. Adapting to the sport might take some custom 3d printed spacers and maybe cutting the sport shaft, but it should be possible.
~40 ft lbs
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