Mesa 7i76e Analog Spindle wiring to Servo drive 0-10v

Hello all,

So i was setting up next thing to my machine, the spindle motor.
I'm using a Kollmorgen 5,7Nm servo motor with a A&B ultra-3000 drive.

The drive is setup in velocity mode, so i can control the rpm by applying 0-10v between two pins.
If i reverse the input between those two pins, the rotation change.

I try to understand how the TB4 outputs from the mesa 7i76e works, but o'm not getting it yet.

I have applyed 5 volts from the drive to pin 3 on the mesa board, and a other pin form the drive to pin 2.
No control or so. the motor just starts to turn.

What do i miss? Or do some have a better way to make this work?

Regards,
Erik

Have a Look:
forum.linuxcnc.org/media/kunena/attachme...8/7i76_Anschluss.pdf

Thank you.

I have looked at these examples.
Unfortunately it didn't work.

What does the mesa board wants? If i understand it correct, the mesa "asks" external 10v to make the signal for the right RPM.
I did it with 5v, but it just starts to turn without giffing the command in linuxcnc.

Mesa ist described as digital potentiometer. Have you given all three wires? Have you connected all digital signals? Have you programed your vfd correct?
Mike

Yes i have. Its actually not af vfd...its a servo drive that can be also controlled by 0-10v.
I did connect the 3 wires. Didn't make any change.

Between pin 25 and 26 i have to apply 0-10v. (or 0-5v). If i do that with lets say 1.5v AA battery, it works.
Depends how i connect it, witch way the spindle will turn.
I programmed the servo drive how fast it should be accelerate.

Witch are the digital signals?

I might think i have to connect a common, but witch one?

Attachements are the I/0 connectors and 0-10v connection

To check the 7I76E spindle output I would:

1. Connect +5V to spindle+ (TB4 pin 3)
2. Connect 5V common/gnd to spindle- (TB4 pin 1 = bottom pin of TB4)
3. Measure voltage from spindle- to spindle out (TB4 pin 2) this should be very close to 0 when LinuxCNC is not running or spindle is not enabled or spindle speed is 0
4. If you have a pncconf created hal file you should be able to set the output voltage via MDI M3 M4 commands

Also you should wire the spindle enable to make sure the spindle is disabled
when not specifically enabled by LinuxCNC

Thank you.

I will gif it a nother try this evening.

Is there a chance that i have to set up the spindle control pins in the hal file?

Yes indeed it worked.
I search for a common pin on the driver, and that did it.

Only thing is i have to adjust the right rpm.
How do i do that the right way? I tried to adjust the scale, but aint getting there.

Typically you adjust the analog scale and limits to the drives RPM at full scale voltage, so if you drive spins at 4500 RPM at 5V (and you have 5V between TB4 pins 3 and 1) you would set the scale and positive limit to 4500