🚀 go-pugleaf

paulxxxx@leland.Stanford.EDU (paulastya gupta) writes:
>I am looking into selecting a linear DC motor for an application 
>which needs a travel of 1" total.  Preferably, I would want a 
>brush type motor (based on my motion controller).  The resolution 
>needs to be in the order of microns, and thus I am thinking of using 
>a glass scale for feedback.  

     Try Oriel Corp., 203-377-8282.  A typical DC motor driven
micrometer with optical encoder runs $596.00.  This is for 1" travel,
0.1um resolution, < 2um unidirectional repeatability, backlash < 8um,
top speed 200um/sec under 10Kg load.  Oriel has a full line of optics
and related hardware, and a useful set of catalogs.

     For higher precision, Melles Griot (1-800-835-2626) offers 
similar devices with 50nm resolution and +-100nm repeatability.
Probably more expensive.
					
					John Nagle