Mesa 5i25+7i77 plug-n-go configuration

Thanks Nick !

I am even not getting power at servo output. I have just checked with multimeter and it shows slight bump and then 0.00

andypugh wrote:

ishman wrote:

could you please point me the relevant page no. of manual regarding additional power supply ?

Page 1. (and more clearly, in bold, on page 14)

(and the pinout for TB2 on page 5)

Thanks for help again.

I am slowly getting it.
TB2 connector's VFIELD (any of four) connector needs to be powered by additional 8-32V power supply ?
Then when W1 is in default left hand position, VIN is connected to VFIELD.

What do you mean by "Servo output"?

Power !

I meant servo enable power. My drive needs 12v input for servo enable. and 7i77 provides power for servo enable. So it can do it as well if I supply the power to VFIELD.

Thanks.

I'm pretty sure servo enable acts as a switch.
You need to apply power to it - its not supplied by the field power.
and you need to watch the polarity.

I am still to try today with field power supply. But as cmorley said. I want to confirm that does ENA0 to ENA5 servo enable connectors needs additional or separate power supply ? How does these connectors source power ?

In my open loop system, I am using external power supply for enabling servo and not using servo enable option from breakout board. because breakout board's servo enable output was the main culprit for my previous problem where it was showing that servo is enable but not supplying enough power.

from the 7i77 manual :

SERVO ENABLE OUTPUTS
Six uncommitted OPTO coupler outputs are available for drive enable. Five of these
outputs are (ENA0 through ENA4) are switched in common while ENA5 can be
independently switched for spindle applications. The ENA outputs are floating switches so
can be used for active high and active low drive enables. Output rating of the switches is
50 mA max at 100VDC max . Note that the enable outputs are polarized and can be
damaged with reverse polarity. For active high drive enables. ENAN+ should go to the
appropriate positive power supply and ENAN- to the drive enable input.