13-01-2013, 22:33
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Missouri S&T Senior
 FRC #2410 (BV CAPS Metal Mustang Robotics) Team Role: College Student
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Join Date: Apr 2010
Rookie Year: 2010
Location: Overland Park, Kansas
Posts: 2,372
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Re: Lead screws
Quote:
Originally Posted by Kevin Sevcik
We used a lead screw in a telescoping arm in 2011. The easiest way to attach a KoP motor to a leadscrew is to buy a leadscrew the same diameter as the output shaft of your gearbox and use a rigid clamp-style coupler to attach the two together.
Next easiest is to use a lathe to turn the leadscrew down to the same diameter as your gearbox shaft and then use a clamping coupler.
Least easy is if you can't afford to have the length of the gearbox+motor sticking out the end of your leadscrew and you want a sprocket or pulley on there instead. Then you need to do a true end-prep on the end of the leadscrew, which involves turning and end down so you have (working from the end of the screw inwards): an output shaft sized for your sprocket/pulley, a thread for your lock nut, and a bearing seat for one or two bearings. And then you need a bearing block to house those bearings. Probably you're not actually interested in this option, so go with one of the first two.
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Considering that ATA has more Lathes than some teams have students... 
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Team 2410 thinks KISSing is amazing! Keep It Super Safe! - "You know you've been in robotics too long when you start talking to your tools." "Well, you've been in robotics CLEARLY too long when they start talking back"
- Theory is when you know everything but nothing works. Practice is when everything works but you don't know why. On our team, theory and practice comes together - nothing works and nobody knows why.
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