Quote:
Originally Posted by JamesTerm
I also have been considering to use this model... Thanks for the feedback what would be great is to know how to make something similar to this buying separate parts that are affordable. From that one could buy a different lead screw like an 8 or 10 start. I'm having a hard time finding information about how to mount the motor onto the screw, and how this is self contained on the other end. I'd almost want to take one of these apart to see how they are doing it. (this is still research in progress)... Any insight to this would greatly be appreciated.
P.S. I was thinking of using this as a lead screw http://www.use-enco.com/CGI/INSRIT?P...&PMPXNO=942694 |
You don't have to drive the screw. If you drive the screw, you'll most likely need to support both ends with bearings and thrust bearings, and you'll need another bearing solution for the nut/carriage, which wants to twist. If you do drive the nut, you could probably mill a hex on the top/bottom and put a gear/versahub/sprocket on it.
You can also drive the nut, which is what we did on our climber. We found this to work well with the geometry of our climber, as the screws were non rotating and fixed to our climber arm.
We put the nut in an 1/8 inch wall aluminum box, drove it with a sprocket, and used two of these (
http://www.mcmaster.com/#60715k11/=sysaez) bearings.
Multi start lead screws are awesome and can go pretty fast. We prototyped an 8 start climber that could lift the robot one level up in under 4 seconds, but were unable to use it due to other gearbox issues.
The material selection of both the nut and the screw are important too.