EMC and 7i43

I'm with cncbasher, the model number of the drives would help a lot here. Otherwise we are playing connection roulette, and are likely to lose...

I'm working on a Hurco KM3 with randtronics servo amps and electrocraft e26-2 DC servo motors.

I know that all parts were working before the retrofit began.

Randtronics was acquired by CMC Controls. A lot of their data is freely available at their website.
www.burny.com/burny_servomate.asp

i'd recon if you look the part number of the drive will begin something like ' SM1 150-1120 ABC
the SM1 being the board type , 150 being the drive voltage

also more information is in the wiki
wiki.linuxcnc.org/emcinfo.pl?Servomate

so it would appear you could have +- 10v analog drives ,

I have 90VDC boards of a style SM1090-1110C or SM1090-11100

I can't quite read the last digit.

ok you have SM1 Boards 90v buss

sm1 manual is available on the previous links but iv'e linked again here

www.skullworks.net/include/Servomate-AO-73187.pdf

supplying analog servo signal from EMC to J4 aux
and analog servo ground to J4 com should do the trick

the aux input pot on the board may need adjusting to give full range of speed

My AOut pin appears to be outputting in the mV range, should I try a 5v aux input?

Can you try the outputs with nothing connected to the 7I33
~0 output voltage is expected if either the channel is not enabled (check the enable out signal)
or there PWM value is set to 0 or close to 0

Are all three LEDS on on the 7I33?
Are the enable outputs of the 7I33 high (~5V)
What is setting you PWM value (PID?)

Can you unlink the pwm enable and pwm value pins in the HAL file and try setting them by hand?
This will test the hardware. Setting the pwm value (something like hm2_7i43.0.pwmgen.00.value) to the pwm scale should give you 10V, setting pwm value to -pwm scale should give you -10V on AOUT

I get a good enable signal, my PID settings are P:1 and all else 0 at the moment. I'm trying to setup a HAL with self-selected PWM commands.