> - How stable is the hm2 fpga-code + driver right now? anyone > using it routinely for 'production' ?
I can't comment on 'production' stability as I am only a hobbiest, but my lathe conversion with a 5i20 and hm2 (my first foray into emc) went painlessly (ie none of the problems were emc/5i20 related). I used the lathe last week for the whole day and I had no problems. > For the lathe I will have servos on the Z- and X-axes, not > sure about DC-brush vs. brushless yet, but Jon Elsons PWM > amps work very well on the mill so I am leaning towards them. > Then the spindle will hopefully be driven by a big 1.75kW > brushless servo. I picked up second hand AC servos and drivers on ebay. I use a 1.5kW AC servo on the spindle (geared 3:1 so max rpm is down to 1500). I use the encoder and index directly on the spindle to synchronise threading. My plan is to use the servo on the spindle as an A axis, and add a Z (Y?) axis with another spindle to be able to machine rotary table style - this is more of a dream. > The lathe project also calls for a > revolver-type toolchanger which needs one I/O bit for a > pneumatic cylinder, and one servo/stepper axis to rotate the revolver. > In addition I will need the usual jog-pendant I/O: MPG > (thinking about two, separate for X and Z), a few > selection-switches, and some buttons. Live tooling is a dream > for the future :) Looking at the schematic for the mill[1], I > think the lathe setup will be pretty similar and I should be > OK with 72 I/O pins. I've only used 2 I/O pins so far - home X and touch probe. I have a USB pendant. I can't see myself ever using all the I/Os. ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
