On 01/05/2012 05:05 AM, andy pugh wrote: > I recently got some Avago AEDR8300K encoder sensors. These have two > detectors in a small SMT package for quadrature in one device. > http://www.avagotech.com/pages/en/motion_control_encoder_products/incremental_encoders/reflective_encoders/aedr-8300-1k0/My > plan was to laser-print a target onto adhesive vinyl and use that as > the target, but unfortunately it seems that these sensors require a > very shiny target (specular reflectance> 60) with not-shiny parts. > White paper is "not there" to these sensors. Polished aluminium is > very much "there" but so is polished aluminium with black marks on. > After some experimentation I found that polished aluminium with an > etched pattern works very well, though. So I CNC-marked a polished > encoder ring and etched it in FeCl. This looks like it is going to > work very well indeed, and was a lot less trouble than milling (and > more suited to the dimensions of the part)http://youtu.be/c1zCG-uPaoM > > I will see how the pen-drawn version works out, but the idea ought to > work fairly well (and at much finer pitch) with photo-resist methods. >
Love the "clamp" mod on your cutting head! <VBSEG> Mark ------------------------------------------------------------------------------ Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
