Oh and the reason for all those opto RJ45 interface modules is because the STMBL drive: http://www.autoartisans.com/mill/STMBL-4.1.jpg uses the top connector for step/dir/enable and fault as RS422 signals. The next RJ45 is for the encoder index, A and B as RS422 signals along with 5V to power the encoder. The bottom RJ45 is for the AC Servo motor U, V and W signals also RS422 and again 5V to power the encoder.
This photo http://www.autoartisans.com/mill/HarmonicDrive/TestSetup1.jpg shows the Harmonic drive (rated at 170VDC) running on 48V with the STMBL. The TTL input step/dir and enable are translated to RS422 on the proto-board. The harmonic drive has a tiny and expensive connector for the encoder signals. Again a hacked together interface to provide the RS422 into the STMBL. That I'll be changing to a DB-25 that is identical to the pins from the Bergerda DB-25. In that previous posting with my interface boards I have that small DB-25 to RJ45 adaptor that will provide a much cleaner interface. One of the nice things about the STMBL is that you can test a high voltage servo motor at low voltages while getting things connector correctly. That option isn't there with Servo Drives that take 220VAC input for motors that are rated at a lower voltage. John _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
