Cool. A number of older XY plotters used this method. The place where the cable was wrapped was actually a roller with a helix groove in it with enough wrap-turns that the middle of the cable on the roller was screw-anchored so friction was never a problem - it couldn't slip. String encoders work this way. I'd guess with this method you couldn't have the wire running down the middle but need two at each end of the roller bar so the head could move back and forth and you push/pulled both sides. What about using a timing belt, much like the X-axis uses. Cut two lengths and flatten them out and glue it to each side of a carrier board. Mount timing pulleys with their cheeks sanded off on the rollers and you'd have a double rack and pinion system. Mike >Mon Sep 24, 2012 6:16 am (PDT) . Posted by: >"KalleP" idyllicpress <mailto:kalle@...?subject=Re%3A%20Sillhoute%20Cameo%20-%20Small%20electric%20spindle> >> How about a small modification to make a proper Y axis bed. >> Using suitable guide rollers (bearings) to keep a carrier aligned and then a timing belt gear instead of the grit/knurled roller. Fit and tension two lengths of >>timing belt below the bed that run on the gears. > >Saw a similar idea used here. > >http://www.cnczone.com/forums/549478-post668.html > >Kalle >-- >Johannesburg, South Africa [Non-text portions of this message have been removed]
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Re: Sillhoute Cameo - Small electric spindle
2012-09-24 by Mike Sinclair