On 2/26/2012 3:39 PM, Kirk Wallace wrote: > On Sun, 2012-02-26 at 15:13 -0500, Dave wrote: > >> I'm not meaning to be a joy killer, but have you looked at the encoder >> wheels that you can buy from places like US Digital? >> >> The seem really cheap to me at $18 for a qty 1 - 2" diameter disk >> including a hub. Higher volumes and the prices drops quickly. >> >> I bet if you call them they will tell you how they make those. They are >> pretty open about their technology. >> >> Dave >> > I want a 3" encoder to go on the end of a ballscrew like this one: > http://www.wallacecompany.com/machine_shop/bridgeport/00047-1a.jpg > > My guess is that US Digital would charge a fortune to make a custom > disk. Once I get the system worked out, I can make as many as I want. > > My guess is that they use film because the US Digital disks I have, seem > to smear or get tacky like film if I get moist fingers on them, which I > very much avoid doing. > > I have a motor with a mirrored and etched glass encoder disk. I think > it's one of the sexiest things in my shop... besides me of course. >
I see. You could use a hub to shaft adapter off the end of that ballscrew and use a smaller diameter encoder disk.. just thinking. I have seen a lot of small timing belt drives off ballscrew shafts leading to shaft encoders at a 1:1 ratio. I have three setups like that on my lathe. Glass disks are sexy, but they don't like shock very well. Dave ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
