Hi
I just finished building a linear translation slide based around a 1/4" allthread rod. I am using this motor:
http://www.eminebea.com/content/html...pm42s096.shtml
Pictures of the setup can be found here:
http://www.flickr.com/photos/7261353...7600211462368/
I am using a Linistepper to drive the motor. When I run it with CSTEP or KCAM4, the motor attempts to turn, but often can't overcome the load and steps backwards. If a small amount of pressure is applied in the direction it is trying to turn, it will turn unassisted for a while. A colleague suggested that instead of having the guide rod above of the motor, I should put it parallel to the screw. Any other ideas of how to reduce binding or friction would be greatly appreciated.
Thanks,
Kyle
UPDATE: My guide rail is a hollow aluminum tube and my "linear bearings" and end supports are flanged nylon spaces. My coupler consists of a 5/16" to 1/4" reducing nut, which has a small O-ring placed inside of the 5/16's half. The motor is then force-fitted onto the coupler. It is near impossible to get it on straight, could this be a problem? Also, I noticed a few brownish spots on the threaded rod, could this be causing extra friction. However, I can drive the motor fine over one section or the threaded rod in one direction fine, then have it bind up going the opposite direction over the same spot. I noticed that the assembly binds up more the closer it is to the motor, too. I hope this makes sense!