<![CDATA[SoliForum - 3D Printing Community — One problem with direct drive :-).]]> https://www.soliforum.com/topic/9086/one-problem-with-direct-drive/ Thu, 08 Jan 2015 16:24:56 +0000 PunBB <![CDATA[Re: One problem with direct drive :-).]]> https://www.soliforum.com/post/78042/#p78042 Or you could print something like this that is the correct dimensions.  This is two halves that are just glued together with acetone so I didn't have to pull the rod loose.  It works amazingly well the picture is with it in motion so I apologize for the quality.  It is important to design in a shoulder that rides on the inner race of the bearing.
 

http://i.imgur.com/Bg5wxWa.jpg

]]> Thu, 08 Jan 2015 16:24:56 +0000 https://www.soliforum.com/post/78042/#p78042 <![CDATA[Re: One problem with direct drive :-).]]> https://www.soliforum.com/post/78039/#p78039 jagowilson wrote:

If you replace the side bushings in the frame with some of those flanged bearings, it'd be so tight I'd be amazed if it could drift. Just a thought. Since that's a new rod, you can get those bearings on easy... My SD rod won't fit them at all though.

Depends on the bearings. The one I bought from boca bearings I had to spend a week sanding in bits of spare time to get it on the shaft at all, the one I bought from misumi simply slid right on the shaft with no real resistance (though both were supposedly 6mm holes :-).

]]> Thu, 08 Jan 2015 15:47:14 +0000 https://www.soliforum.com/post/78039/#p78039 <![CDATA[Re: One problem with direct drive :-).]]> https://www.soliforum.com/post/78038/#p78038 If you replace the side bushings in the frame with some of those flanged bearings, it'd be so tight I'd be amazed if it could drift. Just a thought. Since that's a new rod, you can get those bearings on easy... My SD rod won't fit them at all though.

]]> Thu, 08 Jan 2015 15:42:48 +0000 https://www.soliforum.com/post/78038/#p78038 <![CDATA[One problem with direct drive :-).]]> https://www.soliforum.com/post/78027/#p78027 It finally happened last night: The Y rod slid sideways for some reason and the oldham shaft coupler wasn't coupled anymore (making it kind of difficult to move in the Y direction).

It has run for many hours with no problems, so I'm not sure what made it decide to shift last night, but if it keeps happening, I guess the next step will be to improvise some sort of thrust bearing for the other end of the rod to make sure it can't drift sideways.

]]> Thu, 08 Jan 2015 13:22:42 +0000 https://www.soliforum.com/post/78027/#p78027