On Thu, Jan 27, 2011 at 2:43 AM, Steve Blackmore <st...@pilotltd.net> wrote:
> On Wed, 26 Jan 2011 22:03:33 -0600, you wrote: > > >Eric, the friction on my linear axes is not anywhere close to the friction > >in the rotary table. IIRC, it takes less than an amp to move my X axis, > and > >over 3 amps to move the rotary table. It has a tight worm drive. > > > >I will indeed look at lubing it. > > > >I did take apart a rotary table once (not this one). It was educational. > I > >will probably look at it too. > > > >I do not believe that any of the table locks that this table has, are > >engaged at the moment. But I will double check that also. > > What make of rotary axis is it? A pukka CNC, or a manual conversion? > > I've CNC'd several manual tables, all needed some work other than just > strapping a stepper or servo on. > > There are a plethora of Indian, Taiwanese and Chinese tables out there > and quality and design varies greatly. Shoba, Soba & Vertex spring to > mind. Some have bearings, some not, but all needed at least the worm > running in with light grinding and/or polishing paste to remove tight > spots and get them smooth and as backlash free as possible throughout > the full rotation both CW & CCW. > > Most need thrust bearings on the worm side to remove end float, and some > also need radial bearing there too. (Had some where the shaft seizes at > higher speeds)! > > It is called a Troyke U12PNC. Here's are pictures and many details: http://igor.chudov.com/projects/Bridgeport-Series-II-Interact-2-CNC-Mill/24-Troyke-Rotary-Table-U12PNC/ I will take it apart one day to look at the mechanism. i ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
