Jon, What would be the approximate cost estimate for your setup?
No, the VFDs are each set to same speeds, with a single analog output. Todd Zuercher P. Graham Dunn Inc. 630 Henry Street Dalton, Ohio 44618 Phone: (330)828-2105ext. 2031 -----Original Message----- From: Jon Elson <el...@pico-systems.com> Sent: Wednesday, October 09, 2019 10:57 AM To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net> Subject: Re: [Emc-users] Mesa Card Suggestions On 10/09/2019 08:49 AM, Todd Zuercher wrote: > Hello, > > I'm considering converting a machine currently running Wincnc over to > Linuxcnc. > The Wincnc control has a pci card with two 37pin connectors, that are > connected to a proprietary breakout board. (40 GPIO-in, 20GPIO-out+6step/dir > pairs, and 1 analog-out) Most of the IO on those connectors are simply TTL > 5v, except for 3 pins that are used for the analog output of a digital pot. > > This machine has 7 joints, (one slaved) and 6 axis. The Wincnc control is > limited to only 6 axis of control, so the slaved axis is just sharing the > pulse signal, with a Rube Goldberg design of relays for squaring the gantry > when homing the machine. > > The joints are Kollmorgen S200-VT-S servos, currently commanded in position > mode with quadrature pulses. > Then there are 4 VFDs controlled by some of the GPIO and the analog output. > > For GPIO there are 18 digital inputs used, and 10 digital outs. > > I don't want to reuse the existing strategy for controlling and homing > the slaved axis, I want to do it right, so I will need 7 sets of quad > commands (or analog if I go that route, but that would mean a lot more > rewiring to add encoder feedback.) What is probably my best Mesa card options? > At this point I am leaning toward a > 7i76E + 7i78 > Anyone see a better option? > > Well, it would also be possible to use two units of the Pico Systems universal stepper controller to get up to 8 channels of quadrature position command. You would have 30 uncommitted digital inputs and 14 digital outputs (plus drive enable). This could leave some digital inputs and encoder channels for spindle encoder, MPG and a jog pendant. There is a spindle DAC option to have one analog +/- 10 V output for spindle speed command. Do you need DIFFERENT speeds on the 4 VFDs? It would also be possible to use the Pico PPMC board set with a few extra cards to get the required inputs and outputs, if you decide to go the analog route. Jon _______________________________________________ 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
