[RakmUp]

Hello...have some older G320's I am trying to tune for better performance but whenever I connect an oscilloscope to them and they are moving the machine in a program...the motor begins to sound much louder. So much so I have to check it is not running away on me.
There are two small loops for check points and just touching one of them with a probe will do it. The machine keeps moving as it should per the G-Code but the noise has me worried something is wrong.

My tinnitus is too bad to tune them by ear and I continue getting faults when my Z-Drive reverses direction in code. I have it almost as slow as it can go (low acceleration) and my Z-Axis is counter-weighted so very little effort to spin in either direction manually. It is not a heavy load causing the fault.

Any thoughts? Is the added noise normal? Should I be concerned?

[CoAMarcus]

RakmUp,

Sorry for taking so long to get back to you. We just moved locations and have been running production nonstop to make up for being down for nearly a month.

This sounds like it could be a problem with the probe on the scope. Do you have a different probe you could try? Does this happen on all of the drives or just one of them?

[SocalPE]

RakmUp,

Not that I would be able to help much, but out of curiosity... where do you place the grounds for the probes. Are you going off a general ground, or a unique one specifically for the sign and co-sign?

[CoAMarcus]

SocalPE,

The G320 has a dedicated probe GND, so hopefully he is connecting it to there. The diagram in the link below shows where the probe attachment points are on the drive.

G320 Test Points - Servo Drives - Application Notes - Support | Step Motor Controls

[RakmUp]

Yes...exactly as shown on the diagram. It happens when just one probe is touching too. I have yet to get a good signal.
It could be the scope...or the probe. I bought a cheap one....NanoDS or something from Adafruit. :-/