On Tuesday, February 21, 2012 07:07:45 PM andy pugh did opine: > On 21 February 2012 21:33, gene heskett <[email protected]> wrote: > > Quick test this afternoon, duty cycle sucks > > It might not matter. There will be a hint of dither in the velocity > estimate, but that's not that critical. > If you turn of x4 mode then HAL won't even notice.
Ok if you don't care to know which direction its turning. This one is reversible and there were times when the A/B had no level 0 overlap when I was holding it in position by hand. I can push the opto's around perhaps 20 thou and probably fix that, but it will be critical when the duty cycle is somewhere between 66 and 75% logic 1. I've no clue what the minimum current for reliable operation might be as they spec it for 20ma, with a 50ma maximum. So I think another identical wheel, stacked with this one to cut the slot widths in half or so, is probably the best solution. But I'm going to work on the code and loop it to descend .005 per loop as that seems to be the maximum I can cut with the bit's flex being noticeable when I cut .007 deep. At .008 deep, it looks as if its that proverbial 1/8th turn from broke. I have brass sheet enough to make two more, with the lesser downfeed, which should give me more uniform shaping as this one started out at a deeper cut and the bits wandering around is quite visible. Once timed, I can always seal them together with a bit of solder Or better yet, a drop of superglue. That can be warmed up and adjusted. :) Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> <knghtbrd> He's a about half the size of the others. <knghtbrd> But he's got a chainsaw. ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
