Problem with G340 G100

[evo4wrx]

Im having a problem with the wiring or something else on the G100 and G340 Gecko drives.
Ive tried a number of different setups tuning with Sco's etc etc.

If I connect the encoder to the G340 directly and put a Sco or volt meter
on the back of the G340 on the test points I can the Encoder count up and
down from 5 Volts as per the manuals setup instruction. That to me eliminates anything to do with encoder wiring or powering.

If I connect the Encoder directly to the G100 I can see the encoder count
up and down in Mach 3 in the G100 status and monitor section. I can also
see the LEDs light up under the wire terminals when I spin the motor back and forth. So I can Discount any issue again with the encoder or the G100.
I can also assume that If i approx sping the spindle over a full 360 Degrees and the count number in the G100 monitor utility reads 1000 and my encoder is 1000 CPR that it is working correctly.


I cannot in either setup though make the G340 function correctly with the motor.
The motor is always spinning with about 50 Volts going through it unelss
limit pot on the back of the G340 to all the way Counter clockwise. Im using a PMDX 8020 board. I have two of them and have tried using both but both do the same thing. I have tested the voltage out to be 80.05 Volts.

If I pull out the wire and the resistor between terminal 5 and 6 as indicated in the setup instructions install for the test and setup phase the G340 just faults with a red light which does not turn off. The second I put these back in place the fault lights turn off and the motor begins to turn without me telling it to turn.

I can disconnect the G100 all together however the g340 will continue to spin.

Mach 3 seems to be talking perfectly to the G100 and Ive updated it to the latest firmwares.

Any ideas would be great. Ive attached a schematic of the wiring.

I thought it may be an issue with the index setup. Im guessing the problem sits with index or home limit switch. However I wouldnt have thought the G340 would power up and then begin to spin a motor over without power or command from the G100 as you could strip leads screws pretty easy that way.

[nicad]

I see two problems with the wiring diagram.

1) The encoder from the motor (V+, Gnd, A, B) need to connect back to the G340, not the G100. The encoder inputs on the G100 do no work with servo motors like you are trying to do. The hardware is there, but the software/firmware was never finished for it.

2) If I am not mistaken, By default, the G340 wants the COMMON be connected to the GND on the G100, not +5V like it is shown in the diagram. I also think the G340 has a selection switch to internally swap the COMMON to be either +5v or Gnd.

So, the PC (via Mach) talkes to the G100 via network.
The G100 talks to the G340 via the STEP, DIR, and COMMON lines.
The G340 talks to the motor and the motor encoder talks back to the G340.

Hope this helps..
Colin