_______________________________ From: andy pugh <bodge...@gmail.com> To: Greg Bentzinger <skullwo...@yahoo.com>; Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net> Sent: Wednesday, November 23, 2016 3:18 AM Subject: Re: [Emc-users] Wiring up a 7i77
On 22 November 2016 at 22:54, Greg Bentzinger <skullwo...@yahoo.com> wrote: > The technical details in the manual are very sparse and from what I can > gather the speed input is not tolerant of negative voltage. Direction appears > to be controlled solely by a FWD or REV inputs. That is how I read it too. I suggest initially making sure that you use the motion.spindle-speed-out-abs pin to drive analog-output 5. The reason to use output 5 is that that has an independent enable output controled by the 7i77.0.1.spinena HAL pin (numbers 0 to 4 all switch together on 7i77.0.1.analogena). You can use that enable to turn the spindle on and off. Do you need spindle reverse? Setting parameter F03 to 1 sets the inverter up such that input 3 is On/Off and the input 4 is FWD/REV. This is the the way you probably want to wire it. 7i77 pin 21 ENA5- -> Inverter 3 (FWD) 7i77 pin 22 ENA5+ -> Inverter 6 (+12V) 7i77 pin 23 GND -> Inverter 10 ( 0V) 7i77 pin 24 AOUT5 -> Inverter 9 (MVI) In HAL (assuming 5000 rpm spindle) net spindle-cmd motion.spindle-cmd-out-abs => hm2_5i25.0.7i77.0.1.analogout5 net spindle-on motion.spindle-on => hm2_5i25.0.7i77.0.1.spinena setp hm2_5i25.0.7i77.0.1.spinout-maxlim 5000 setp hm2_5i25.0.7i77.0.1.spinout-minlim 0 setp hm2_5i25.0.7i77.0.1.spinout-scalemax 5000 That should be enough to give you spindle control in the fwd direction at least. > The CMC/Randtronics Servomate amps have a voltage output (not sure if its > -10V -0V- +10V or just 0-10V) to indicate actual servo load, can the analog > voltage sensing inputs read this such that I could use the feedback for a > GladeVCP loadmeter panel? Yes, that should be possible. The inputs are 33.6V @ 8 bits, so 0.12V absolute resolution. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1916 Andy - Well that is a start. Being a BridgePort type clone you need FWD and REV because what is considered FWD depends on if you are in High Gear (500-4000) or Back gear (low) 60-499 RPM. However since I have had a stack of castings sitting in wait for 6 weeks I would gladly settle for just being able to get FWD and REV online and lie in the Gcode with a M4 for FWD in low. The motor runs as on|off and all speed adjustments are done via pulley adjustments. I do not want to use the VFD to control speed as it is an Economy model not well suited to such a task (word directly from a TECO engineer I met at a trade show) More later - I just was paged for a service call. Greg ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
