On Saturday 15 February 2014 19:34:42 John Figie did opine: > I want to spin a light load, being an encoder, at 14000 RPM using a > motor running at 7000 RPM. So I would gear up 1:2. Does anyone have > experience running a timing belt this fast? Is it practical? I only > want to do this for test purposes to run the encoder at its max rated > speed. I only need to run for mabe a few minutes to mabe an hour max.
With quality belts, this is probably possible, but how many slots does the encoder disk have? For a 200 edge encoder, like I use on my lathe, I'd say you would have to have hardware counters as that would be about 11k rpms above what I can do in the software encoder without missing a count. Most opto devices would have response time errors up in that speed range. If you need test pulses that fast, you would be advised to do the pulse generation in TTL logic as you can do that in 2 or 3 chips that cost 5% of what a belt that can go that fast would, without spitting out debris from overheating. 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) Genes Web page <http://geneslinuxbox.net:6309/gene> NOTICE: Will pay 100 USD for an HP-4815A defective but complete probe assembly. ------------------------------------------------------------------------------ Android apps run on BlackBerry 10 Introducing the new BlackBerry 10.2.1 Runtime for Android apps. Now with support for Jelly Bean, Bluetooth, Mapview and more. Get your Android app in front of a whole new audience. Start now. http://pubads.g.doubleclick.net/gampad/clk?id=124407151&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
