Wiring of servo spindle - MESA 7i76E

Hi All,

I was hoping somebody could point me in the right direction regarding my wiring for my servo spindle to a MESA 7I76E.
I bought a 2.2 kW servo spindle from China.

As I am quite new to all of this, it would be great if somebody could tell me if my wiring is (so far) correct and maybe fill in the gaps.

I am a little confused that there are not 2 inputs for SPINDLE DIR + and - on the servo.

I was also wondering if the TB4- Pin3 SPINDLE+ needs an exact 10 V supply or if a 12 V would be fine.
Any help would be very much appreciated.

This is the last little bit of my control box that I have to sort out.

Many thanks!!!

The 7I76E spindle enable and direction outputs are switches so both leads must be used:

ENA- 24V GND
ENA+ Drive Speed Enable
DIR- 24V GND
DIR+ Drive Reverse

12V is OK, 16V is absolute max

Excellent - Thank you very much that was very helpful.

As ENA+/- and DIR+/- operate as switches would that mean I could switch the suggested connections around.

I revised the wiring diagram. Does that look right to you?

I have a few more questions if you don't mind:

• SEL needs to be connected to 24V DC - correct?
• Where should I connect the Emergency Stop to?
• What does DO COM stand for and where should I connect this one to (TB6 - PIN1 INPUT 0)?
• Are Warn Output, Speed Reach, Zero Speed of any use for LinuxCNC and if yes where should I send them back to on the MESA board?
• Is the connections OZ+ to IDX- and OZ- to IDX+ correct? Or do they need to be swapped around?

Thank you!

The diagram looks correct

I suspect DO COM either goes to ground of +24V but this needs to be checked in the
drive manua.l How this is connected will determine how easy is will be to use the
Warn Output, Speed Reach, Zero Speed outputs. Note that Speed Reach and Zero Speed
can be sensed by LinuxCNC with the encoder feedback.

Typically the IDX polarity is "dont care" because it only determines the active edge of the
index so on normal encoders only makes a 1 count difference.

Emergency stop would be connected to your emergency stop loop (it should disable the drive when open)
This loop consists of series contacts will normally have at least mechanical Estop switch plus perhaps a
relay under LinuxCNC control.

Thank you PCW.

I had a look in the manual and I attached the page that concerns the wiring for SEL and OCOM. Could you please have a look?!
From what I gather both ports would need to be connected to an external 24V?! 
Is it better to take the 24V from the MESA board directly (as they have a current limit I believe) or from my 24 power supply?
So how would I connect the Warn Out and the Speed Reach and Zero Speed to the MESA board. I guess the Warn Out would be quite useful.

I can wire the emergency stop of the spindle drive into my 'emergency stop circuit' - no problem. However, a contactor in the emergency loop would already switch off the power to the spindle drive in case of an emergency stop. So would there be any point? I believe you might need it for operation though.

Is it advisable to have a software emergency stop from Linux CNC breaking the physical emergency stop loop via a relay? Currently I don't have that. Currently, I only have an emergency stop on the control box and on my pendant that is connected to this emergency loop.
In case it is a good idea, do you have any specific suggestions for such a relay? Something like this: www.digikey.com.au/en/products/detail/we...r/1218390000/5996986  

Thank you again -  I am almost there image missing /media/kunena/emoticons/smile.png

Yes, with OCOM connected to +24V you can wire the status outputs directly to
7I76E inputs.

The advantage of including LinuxCNC in the Estop loop is that a linuxCNC detected fault
can shut the system down

I don't think I want to give specific Estop recommendations.