Servo Drive Differences

Q.) What is the difference between the G320, G320X and the G340?


The G320 and the G340 are functionally identical, except that the G340 has a step pulse multiplier. This step pulse multiplier is going to have a niche application, and will be required in only two instances: If your encoder line count is very high or if your step pulse signal is very low in frequency. You can also use the G902 (the step pulse multiplier in the G340) jumper settings to set the drive to common ground or common +5V.

The G902 has a jumper setting to choose either a multiplication of 1, 2, 5, or 10 times for each step pulse. This means that if you were to have a 2000 line encoder, a setting of 10 on the G902 would make it equivalent to a 200 line encoder. The maximum frequency of the G902 is 200 kHz, so if you have it at a setting of 10 at a step pulse frequency of 45 kHz, it will be limited to going to 200 kHz, not 450 kHz as it would in a perfect world.

The G320X is an updated version of the G320 which offers the following improvements:

Built in step pulse multiplier
Current mode or voltage mode servo
Stall torque time limit
Four settable following error limits
Encoder fail detect
Short circuit protection
Dynamic motor braking during fault condition
STEP and DIRECTION COMMON can be either +5VDC or GND
PID trimpots with settable integral coefficient
STEP and DIRECTION is +3.3VDC and +5VDC compatible at 6mA
20A 80VDC continuous operating maximum
PID loop closed internally
Quadrature encoder inputs
+5VDC 50mA onboard encoder supply
Opto-isolated STEP and DIRECTION inputs
20kHz PWM frequency
Settable current limit from 0A to 20A