Connecting my 7i96s to the VFD

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27 Aug 2025 08:03 - 27 Aug 2025 08:04 #333979 by Gautham
Replied by Gautham on topic Connecting my 7i96s to the VFD
Yes I have made the following connections

22 - SPINDLE- to COM
23 - SPINDLE OUT to AI1
24 - SPINDLE+ to +10v
and
S1 --> OUT4A
OUT4B --> COM

S2 --> OUT5A
OUT5B --> COM

So with this done, I set Spindle PWM as in the below picture but the spindle doesn't move when I run the config and try the + and - buttons for the spindle. Any ideas would be greatly appreciated. Thanks

Last edit: 27 Aug 2025 08:04 by Gautham.

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27 Aug 2025 14:11 #333994 by PCW
Replied by PCW on topic Connecting my 7i96s to the VFD
You still need to connect OUT4 and OUT5 to the appropriate 
spindle pins in hal (via the TB3 tab in pncconf)

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29 Aug 2025 02:43 #334069 by Gautham
Replied by Gautham on topic Connecting my 7i96s to the VFD
Omg it worked!!! Thank you so much PCW not only did you spoon feed me on how to get my 7i96s to run my spindle but you also helped me get all my steppers working with the BoB. Thank you so much

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03 Sep 2025 21:03 #334372 by Milkof
Replied by Milkof on topic Connecting my 7i96s to the VFD
Hello everyone,
I am also trying to connect the Mesa7i96s card to a Y620-A VFD.
I connected the pins as mentioned in the post above
22 - SPINDLE- to COM
23 - SPINDLE OUT to AI1
24 - SPINDLE+ to +10 V
S1 --> OUT4A
OUT4B --> COM
S2 --> OUT5A
OUT5B --> COM
The M3, M4 and M5 commands work, but I can't control the speed.
Any ideas?
Thanks
Milko

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03 Sep 2025 21:15 #334373 by PCW
Replied by PCW on topic Connecting my 7i96s to the VFD
Can you post your hal and ini files?
 

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04 Sep 2025 15:10 - 04 Sep 2025 15:21 #334406 by Milkof
Replied by Milkof on topic Connecting my 7i96s to the VFD
Ciao, trovi i due file allegati. Grazie per l'assistenza. Milko
 

File Attachment:

File Name: CNC_1.hal
File Size:11 KB

 

File Attachment:

File Name: CNC_1.ini
File Size:5 KB
Attachments:
Last edit: 04 Sep 2025 15:21 by Milkof.

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04 Sep 2025 15:48 #334408 by PCW
Replied by PCW on topic Connecting my 7i96s to the VFD
I don't see anything obvious wrong in the hal/ini files.

What is the actual issue with the spindle speed?

You might need to measure the 7I96S Spindle+ and Spindle output vs Spindle-
at various spindle speeds to track down the issue.

It might also be a VFD setup issue. (if the voltages are correct but the VFD does not respond)

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04 Sep 2025 16:06 - 04 Sep 2025 16:21 #334409 by Milkof
Replied by Milkof on topic Connecting my 7i96s to the VFD
Ciao e grazie per il tuo aiuto.
In teoria, ho impostato i parametri del VFD come segue:
P00.01 1
P00.08 3
Ho trovato questi valori online, ma a quanto pare non sono sufficienti.
Quali altri controlli potrei fare? La velocità sembra essere impostata su un valore e non riconoscere i comandi  in MDI.
Durante il test, sembra essere impostato sulla velocità massima.
In effetti, trovo 9,9 volt tra GND e pin 10V.
Grazie
Milko
Last edit: 04 Sep 2025 16:21 by Milkof.

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04 Sep 2025 16:18 #334412 by PCW
Replied by PCW on topic Connecting my 7i96s to the VFD
As setup, if you have 10V on Spindle+ (7I96S TB3.24) and you run s1000M3
in MDI, you should get +5V measured from Spindle-Out  (7I96 STB3.23)
to Spindle- (7I96S TB3.22)

(you do have to home the machine before MDI will work)

I would verify this before worrying about the VFD setup

 

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04 Sep 2025 16:32 - 04 Sep 2025 16:42 #334414 by Milkof
Replied by Milkof on topic Connecting my 7i96s to the VFD
  Hello,
between pins 22 and 23 I find 10V
between pins 22 and 24 also 10V
I don't see any change if I lower the speed
if I stop the spindle
between 22 and 23 0V
22 and 24 10V

Thank you

Miilko
Attachments:
Last edit: 04 Sep 2025 16:42 by Milkof.

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