Gene said inches per minute. You are saying inches per second. You are off by a factor of 60.
Ken On Fri, Sep 16, 2016 at 11:46 PM, Chris Albertson <albertson.ch...@gmail.com > wrote: > Gene, > > I think I understand now > > On Fri, Sep 16, 2016 at 6:07 PM, Gene Heskett <ghesk...@shentel.net> > wrote: > > > On Friday 16 September 2016 12:06:47 Chris Albertson wrote: > > > > > > Lead screw is a 1605, 40 tooth gear on the motor by way of a taperloc hub > > I made, ditto for the 80 tooth gear on the screw, so the motor is > > running 2x the speed of the screw. The motor is running on a 39 volt > > power supply, with a 2M542 driver set for 16x microstepping. Motor is an > > 8 wire 432 oz/in, wired in series. I am useing a similar if not > > identical, direct drive on the smaller x screw, wired parallel. It > > doesn't move very far, maybe 4" total, but its speed for in and out > > running a g76 threading routine is way more than enough. > > > > So 200 x 16 x 2 steps per revolution is 6400. > then 6400 x 5 steps per inch is 3200 > at 60 inches per second you are doing 380,000 steps per second > or, that is 2.6 microseconds per step. > > I am very surprised at the low performance of the opt coupler in the > breakout board > unless it was intentional. The signal might be intentionally low pass > filtered > in an attempt to reduce noise. That would be a reasonable design > for a breakout board. The designer never assumed anyone would would > run steps at 300KHz. > > To move 60 IPS coins software I think it looks like I might need a direct > drive > using 1/2 steps for 400 steps per revolution. But I'd be at only 2,000 > steps per inch > > Yes I see the logic in using the FPGA board, plus I've always wanted to > learn to program > an FPGA and when not driving a machine tool I'l have one to play with > > > > When asking steppers to run at those speeds, I think 2 things are > > > > > > demanded: > > .... > > > -- > > Chris Albertson > Redondo Beach, California > ------------------------------------------------------------ > ------------------ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
