Schneider Altivar 320 wiring / setup help needed

[Clive S]

Also why would you want to use reverse?

[TadasM]

Also why would you want to use reverse?

Clive,

Thank You for advice reg. grounding screen cable. All my cables are with screen. I will double check if the grounding is still connected, as at this stage I have all electronics mounted on temporary plate of plastic :) .

Regarding the need for FWD /REV - I plan to use this for taping / threading in the future and would like to sort this out so no trouble later (or installation of additional relays, maybe changing BOB, or else :) )

Thank you

[Clive S]

Regarding the need for FWD /REV - I plan to use this for taping / threading in the future and would like to sort this out so no trouble later (or installation of additional relays, maybe changing BOB, or else :) )

To do tapping you would need an encoder with index and A + B pulses. But the problem is the spindle will not have enough torque and at low speeds.

[TadasM]

To do tapping you would need an encoder with index and A + B pulses. But the problem is the spindle will not have enough torque and at low speeds.

Thank you Clive,I will consider this in the future. It looks like in most cases I will be needing only FWD dir at the time.

[Neale]

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.

[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