Quote:
Originally Posted by aldaeron
I think a few more details are needed for a good answer.
You mention a size restriction - what is the restriction?
What resources do you have? Just 12V power? Pneumatics?
Does it have to wind on a 1 inch shaft?
A sketch would work wonders here. A description of the task would too (especially so that you take safety into consideration since it seems you are working with a large load)
Another caution about using Banebots gearbox is that they have a torque limit after which all the gears inside shear off their teeth. I haven't looked in a few years, but it used to be 85 ft-lb.
One solution may be to adapt your motor/gearbox to drive something like this:
http://www.harborfreight.com/1200-lb...nch-65115.html.
To release you can drive the motor to release the load from the winch spool and use a second <something> to pull the stop out and unreel (you can use a smaller <something> if there isn't a lot of weight on the winch spool)
-matto- |
It doesn't have to be 1", that is just my initial thought. I was either considering the banebot or the versaplanetary gearbox. 85 ft-lbs is over 1000 in-lbs am I wrong? That should be enough for around 300 lbs. I was also thinking of spooling it up, locking it in with something, then despooling it, then releasing the lock, but I am worried about having it snag or something. I was thinking about a winch, but they are too wide. It needs to fit within a 10x6x4 inch box.
I have about 32v to work with, but I was thinking an sensored Brushless RC motor with 8.4v (2s Lipo) that can pull around ~400w at a high enough ratio would be perfect. I like that route because the banebot is a 550 size and this motor I have in mind is a 540 size, same output shaft diameter. It wouldn't be too hard to fit the motor to the gearbox. This isn't for any FIRST robotics project so I can use pretty much any resource.
Thanks for the reply!