I need to connect encoders to moving slides. I wanted to do this with a 5 to 1 increase in encoder revolutions so that .0001 resolution can be attained with a 500 line encoder using quadrature counting. But that would mean that the encoder shaft would need to be about .063 dia. Much more realistic is an encoder shaft that is about .318 dia. Then, 1 rev. would equal 1 inch and a direct drive can be used from the slide with a 2500 line encoder. Still, the encoder needs to be driven by some kind of belt or wire. I'm thinking that timing belts would work because they are used in CNC machines and seem to be backlash free. Granted, they usually drive a screw with a pitch of about .200 or 5mm. This means that .0004 belt backlash translates to .0001 table backlash. Right? Looking at a WM Berg catalog some time ago I saw belts made from cable with teeth molded to the cable. I wonder if these would be better. Any thoughts appreciated. Cheers, Eric
- posted
18 years ago