Retrofitting HURCO BMC30

Thank you for the advice, it certainly has it´s pros with this setup will have to consider this approach.

@Wieser,

Yes my machine also has simodrive 611:s. Seems to be a littlebit diffrent setup though. The BMC has the encoder feedback hooked up to the controller, only the spindle feedback is hooked up directly to the drive.

I do not know is this is bennifitial, time will tell image missing /media/kunena/emoticons/smile.png.

I saw a detail in your thread that i wounder a little about, specially in this these screen dump: 
What are the boards to the right? Are these original from your machine or is it some special cards to hook up the cables for the drives?

Those on top are the original Siemens Sinusoidal to TTL "EXEs". They were mounted inside the Siemens 820M Control.

I built simple PCB adapter cards with the correct DB-connector to interface the encoder scales to those in my setup and added a screw terminal for 5V power supply of the encoders and A, B and Index output. 
In my case all axes including the spindle have a tacho feedback directly into the Simudrive and all the encoders were connected to the controller.  If your encoders are similar (DB15 and same pinout), I have four of them left. 

PS. if anyone sees that EXE at the right, that is for a rotating axis and it needs 15V on a specific pin to function correctly, that was a pain to find out. 

PSS. If somebody has datasheets for those, they still would be highly appreciated since they have more pins to send a fault/hardware missing signal to the controller and I don’t have them incorporated yet.

Update of the Hurco retrofiting.
Did run it today with  the old controller. It i runs but have issues with UI freezes up and going in to sleep in middle of programming.
So the new controller solution is needed before could use it to any serious jobs.

Regarding this ordered the mesa boards the other day but EU-Surplus did not have the 7i80 in stock, neither does Mesa them selves.

So the question is now should i wait for a 7i80 card or would it be possible to issue the like of two 7i92 instead?
I have read somewhere here on the forum that the real time UDP controller cards should be directly connected to the PC and not through any switch.
So with a setup of two 7i92 instead of a 7i80 then I need to use a switch in between. Would this work and is there risk to use such a setup instead?

I really have no real urgency in getting the machine ready so waiting a couple of months is okay as it is right now.

Why 2 of 7i92? Why 7i80?
I used a single 7i92, 7i74, several 7i70 and 7i71, and 7i77.
Since there is no easy to find 7i77, i would use 7i92TM plugged directly into a 7i85, then a 7i83 for the analog outputs, and add 7i70 inputs and 7i71 outputs as required.
All of those can be easily found, well if there is no 7i92, get a 7i96S, adds another sserial and some inputs and outputs, and some stepgens you probably have no use for, but will come handy if you ever have to change drives, new ones can do step/dir, most of them.

Thank you for the quick replay as always!

Yes that is maybe a little overkill.

When having a further look at it a 7i92tm directly connected to a 7i77 (EUSurplus did have this in stock), a 7i74 and 7i70 and 7i71 for IO:s would also work fine as I can understand it and it will be a little cheaper as well image missing /media/kunena/emoticons/smile.png