Schneider Altivar 320 wiring / setup help needed

[TadasM]

Bottom of p125 - set "forward priority". Connect "run" output to "rev" input and "dir" output to "for" input. Now F in UCCNC will run one way and R will run the other way. Wire the spindle so that the spindle runs the way you want. You might also need to change "active low" setting on dir pin.

Thank you Neale, I will do as per you recommendation and will come back with results later today :)

[TadasM]

Gents,


Thank you for your help. Much appreciated!

All is working now as it should be (at leas t for now - until next idea or upgrade for the spindle :) ).

The problem was that I have used Output 4 as FWD (or REV output), the output from this pin cant provide stable voltage (probably due to used analog output as they are kinda combined... (HDBB2 manual). I have connected 12Vout (from output 4) to DI (as rev) and Output 3 to DI1 as FWD directions. Changed VFD settings as per Neale recommendations (FWD priority and Sensorless vector control) and all is working perfectly now :) Spindle can go down to approx 2000 rpm without stalling. Lower than 1000 is making spindle to stall.



So thank You gents again and I really appreciate your time for helping me out on this issue.

TM

[Neale]

I must say that I don't understand how this is working! The hddb2 board has a constant 12V on the 12V output pins, not controlled by UCCNC. There should not be a problem with the output pins - they do not deliver any power, they are open-drain Mosfet outputs. In effect, an electronic switch with one side connected to ground. The manual shows that these digital output are completely independent of the analogue signals. That's why the VFD is configured to use its internal 24V supply so that you control it by switching the DI inputs to ground. I would not be happy to use this setup as it is now wired because I do not understand how it works at all!

[TadasM]

I must say that I don't understand how this is working! The hddb2 board has a constant 12V on the 12V output pins, not controlled by UCCNC. There should not be a problem with the output pins - they do not deliver any power, they are open-drain Mosfet outputs. In effect, an electronic switch with one side connected to ground. The manual shows that these digital output are completely independent of the analogue signals. That's why the VFD is configured to use its internal 24V supply so that you control it by switching the DI inputs to ground. I would not be happy to use this setup as it is now wired because I do not understand how it works at all!

I will make short video this afternoon to show how this is working and what problems I have if output 4 is used (instead of 12Vout). I was surprised my self - but after I just tried and it did worked :D

[TadasM]

It is funny how small, simple thing can get so complicated.
I have tried to demonstrate how things are working, but cant get even run the spindle in one direction - UCCNC software keeps giving message just after start that it was disconnected ....

Disconnected both DI1 and DI2 and than I can start UCCNC... once connected to DI1 for FWD function, after M3 command UCCNC just gives message that UC300 have been disconnected...

Im bit confused now...

Didn't had enough time today to look further, but will do this tomorrow... I will start with only FWD direction this time :D

[Lee Roberts]

UCCNC software keeps giving message just after start that it was disconnected ....

Hiya,

Try swapping the USB cable for another one (keep it short in length, 1m)

If you use the USB port on the left side of the laptop, change to the right side USB port.

Also, make sure "power saving mode" is turned off in your laptop bios.

.Me

[TadasM]

Hi again :)

So finally I got additional information, here is photos showing how spindle is connected:



And here is the video showing the problem:




I have measured voltage between GND and Output 3 - it shows approx +24v when spindle is in "rdy" mode. Once I hit CW rotation in UCCNC voltage drops to 0v and as you can see in the video I receiving message that UC300 have been disconnected.
Should the voltage be 0v at idle and +24v when spindle starts to run ?

Lee, thank you for your advice reg. USB cable. Tried with shorter one - same results. I have added ferrite rings on the both ends of USB cable - no luck either :/

Any thoughts ? :)