2014-11-25 0:40 GMT-03:00 Gene Heskett <[email protected]>: > 360, a pulse every degree? if you can only track it to 20 kilohertz, your > circuit is in trouble by about 58 rpm. I am using a 50 cycle/turn > encoder, and the 5i25 is still loafing at 1500 revs. But I would think it > would have to work a little harder watching a 360 cycle ABX. As far as > usefulness for threading, the 50 cycle seems at least adequate. I have > used every thread I have cut with it except the one I saw being started > well at about 150 rpm, then shoved the slider over to about 700. Instant > mess. >
Hello Gene. I didn't express correctly about that. The 20 Khz is the pulse generation cabability of these encoders. I'm going to use hardware encoder counters so I'm far above 20 Khz for reading the pulses. For the job that I'm planning to do with the lathe wich is rough cutting of camshafts I'm not going to exceed 40 RPM on the spindle because the maximum speed of the X axis is 10000 mm/min. It would be ideal to use a round mill and cutter compensation for this job to increase cutting speed and I'm sure LinuxCNC can handle this more than well, but for this first test I'm comfortable with the low speed since this is a big improvement in machining the lobes. Also, for that case we have two old slant copying lathes that are great candidates for such a modification, in fact they are waiting for a LinuxCNC retrofitting. ANyway for normal turning I'm close to 1200 RPM sometimes, but that's not going to be a problem for these encoders, nor the hardware for reading them. -- *Leonardo Marsaglia*. ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
