MESA 7i76 connect to VFD

More
17 Nov 2017 11:22 #101923 by kibo
Hi
can you please advise me to connect the inverter (attachment - VFD) to the 7i76 card (attachment - 7i76).
Inverter photo (Attachment - photo)
I used LinuxCNC system.

Is it correct?:
SPINDLE- => analog input COM
SPINDLE OUT => analog output AO1
SPINDLE+ => analog input AIN1
NC => ???
SPINDLE ENA- =>
SPINDLE ENA+ =>
SPINDLE DIR- => digital input X1
SPINDLE DIR+ => digital input X2

What is the +12V and COM in VFD analog input? Where from do I connect the voltage?

I'm a little confused.
Thanks a lot.
Tomas
Attachments:

Please Log in or Create an account to join the conversation.

More
17 Nov 2017 14:40 #101936 by PCW
Replied by PCW on topic MESA 7i76 connect to VFD
SPINDLE- => analog input COM
SPINDLE OUT => analog input AIN1
SPINDLE+ => +12V
NC => No Connection
SPINDLE ENA- => digital input COM
SPINDLE ENA+ => digital input X1
SPINDLE DIR- => digital input COM
SPINDLE DIR+ => digital input X2

If you need to run in both directions you will need to setup the VFD for "2 wire mode 2" control:
X1= ENABLE, X2 = DIR instead of the default X1 = FORWARD X2 = REVERSE
The following user(s) said Thank You: kibo

Please Log in or Create an account to join the conversation.

More
31 Dec 2017 19:28 #103908 by kibo
Replied by kibo on topic MESA 7i76 connect to VFD
Hi
I connected VFD as mentioned above. (thanks a lot PCW).
Unfortunately, I have a problem with changing the direction of the spindle.
I used Axis GUI.

I can start the spindle.
When I click to "counterclockwise" button and then to "+" and "-" it works.
But when I stop spindle and click to "clockwise" button, the spindle does not change the direction of rotation and immediately picks up the max speed.
The "+" and "-" buttons does not work in this direction.
I do not know if there is a problem with the LinuxCNC or VFD settings.
Thanks a lot and happy new year :)

Please Log in or Create an account to join the conversation.

More
31 Dec 2017 21:14 #103909 by PCW
Replied by PCW on topic MESA 7i76 connect to VFD
Sounds like your hal file is using the signed spindle speed pin rather than the unsigned (abs) one
can you post you hal/ini files?
The following user(s) said Thank You: kibo

Please Log in or Create an account to join the conversation.

More
01 Jan 2018 08:43 #103920 by kibo
Replied by kibo on topic MESA 7i76 connect to VFD
Thanks a lot.
Attachments:

Please Log in or Create an account to join the conversation.

More
01 Jan 2018 15:50 #103927 by PCW
Replied by PCW on topic MESA 7i76 connect to VFD
one problem is this:
net spindle-vel-cmd-rpm => pid.s.command
should be
net spindle-vel-cmd-rpm-abs => pid.s.command

But the spindle direction still should have changed so this suggests that in addition
to the above issue, the DIR output is not changing the VFD direction. This may be a VFD
programming issue or wiring issue
The following user(s) said Thank You: kibo

Please Log in or Create an account to join the conversation.

More
10 Jan 2018 14:26 - 10 Jan 2018 14:27 #104237 by kibo
Replied by kibo on topic MESA 7i76 connect to VFD
Hi
I checked Wiring and VFD settings.
The problem is only when is checked "Use +- voltage for direction" in PNCconf wizard - attachment.

When I unchecked it the spindle direction works.

Now everything is working.
Thank you for your help.
Attachments:
Last edit: 10 Jan 2018 14:27 by kibo. Reason: Correction

Please Log in or Create an account to join the conversation.

More
04 Jul 2022 23:59 - 05 Jul 2022 00:05 #246617 by garrettmin
Replied by garrettmin on topic 7i76 + VFD A2-4007M 110V

Request TB4 Pinout Verification for 7i76 + VFD A2-4007M7I76 VFD

1 SPINDLE- ==> GND
2 SPINDLE OUT ==> 5V IN
3 SPINDLE+ ==> 10V IN
4
5 SPINDLE ENA- ==> ?
6 SPINDLE ENA+ ==> ?
7 SPINDLE DIR- ==> ?
8 SPINDLE DIR+ ==> ?
Last edit: 05 Jul 2022 00:05 by garrettmin.

Please Log in or Create an account to join the conversation.

More
05 Jul 2022 00:35 #246620 by PCW
Replied by PCW on topic 7i76 + VFD A2-4007M 110V
1 SPINDLE- ==> GND
2 SPINDLE OUT ==> 5V IN
3 SPINDLE+ ==> 5V OUT
4
5 SPINDLE ENA- ==> GND
6 SPINDLE ENA+ ==> FWD
7 SPINDLE DIR- ==> Unconnected unless you need reverse
8 SPINDLE DIR+ ==>

Please Log in or Create an account to join the conversation.

Moderators: PCWjmelson
Time to create page: 0.104 seconds
Powered by Kunena Forum