MAZAK POWER CENTER V12 retrofit (if possible)

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04 Apr 2018 11:52 #108368 by Osteen
Hi guys, I'm new here, and searching for clues to retrofit the CNC we have in the company.

The machine :
A mazak Powercenter V12 which is mechnanically in quite good health, it has between 10000h and 15000h according to my boss, the mechanical maintenance is up to date.
the problem resides in the CNC which is wquite old and the axis electronic control cards (not the drivers) burn one after another, and we don't know why.
So as the cards are getting quite rare and expensive, we're looking for solutions to make a retrofit using more modern electronics.
We are at the stage of, what solutions is possible. My boss is looking for a solution based on centroid, and I'm looking for a solution based on MESA - linux CNC.
I've already asked a few question on the forum of usinages.com (french one), and Gaston48 have already been quite knowledgeable about mesa cards to use.
My objectives is to get the right configuration to drive the CNC.
the servomotors have a command using anlog 0-10V command and is using a rotary coder, it seems the same for the spindle except there's no coder.
for the rest, all is based on 24V IO and on that side is quite esay to handle.

For the axis, it was proposed to used 6i25 card with 7i85S cards but they are in STEP/DIR and not in an 0-10V, so not sure about.
Another solution is using 7i77 with 7i74 linked on the 6i25.

But for now, I don't know which is the good solution.
Do you have any suggestions about what could be done ?

thanks for all

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04 Apr 2018 14:45 #108378 by Todd Zuercher
For controlling analog drives you want a 7i77 not a 7i85. Just curious why do you think you need the 7i74? Unless you think you are going to need a bunch more digital IO than the 32 in and 16 out the 7i77 has on board, plus a similar amount from 1 additional smart serial card.

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04 Apr 2018 15:19 #108379 by Osteen
For the 7i85, it was an advice for common installation.
For my solution i'm ok on the point that i need 7i77 for analog drives ( and the coders ?).
For the IO, I need at least more than 40 inputs for security feedback, spindle orientation control for tool change, all the commands for tool changer, the coolant and so on.. The complete chek up is not done yet to know how many input and output. For the 7i74, it was proposed by the guys on the french forum.
And for the panel control, a 7i73 to plug the jog, the buttons and switchs.

As I hear, I think it will be better to finish a diagramm of the functions of the machine before even trying to know what sorts of hardware I need.

Going to work on it fastly
thanks for your reply

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04 Apr 2018 15:53 #108385 by Osteen
I drafted a diagramm to help the comprehension of the machine, it is quite simplistic and not complete but helps about the goal. [/sub]
Attachments:

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06 Apr 2018 12:25 #108492 by andypugh
are the servo drives in good condition and reliable?

If so then a 7i77 should be all you need.
You could all the extra IO with one smart-serial card, but if you plan on also having a 7i73 (and I think that is a good idea) then you will need the 7i74 to connect a second (or more) smart-serial card.

It would be possible (just about) to do the whole retrofit with smart-serial devices, using the STMBL driver to replace the existing servo drives. This is a good solution and has been used on a few lathes already. The drawback is that the STMBL is not really commercially available, you would need to find someone ordering a batch and join-in.

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17 Apr 2018 13:38 - 17 Apr 2018 13:38 #109183 by Osteen
Yes the servo and drivers are in good shape, a test for the isolation and the coals of the DC motors will be done before modification.

The 7i73 board will be used for the control panel. the 7i77 board will be used for the drivers and coders, and so as we want to add a 4th axis which will not be plugged all the time, does this axis need to be installed on another card or can it be installed on the main board ?
For the IO, so if i understand correctly what you say, I can use the same 6i25 (or 5i25) board. But the question is, what is the best setup for IO ?
A solution is to have a 7i84 with 25pins daughter cards, but maybe a 7i46 with enough 7i64 board should be a good deal, no ?
The price is not a problem for the solution, what i'm searching for is reliability and security..

Thanks for all
Last edit: 17 Apr 2018 13:38 by Osteen.

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17 Apr 2018 14:51 #109190 by PCW
I would probably use a 6I25/7I77 and then add a 7I74 or 7I85 for more sserial channels (8 or 5)
The a 7I84 or 7I84D for additional 24V I/O

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26 Feb 2019 10:32 #127151 by aventtini
hello I have a machine olso for retrofit do you have the spindle schematic . I missing that page from manual

allex

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27 Feb 2019 19:50 #127286 by Osteen
Hi Alex..
I'm quite overwhelmed with my job right now but I'll try to look for it next week.. Don't mind reminding me if I forget your inquiry..

Mat

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04 Jul 2019 16:19 #138632 by aventtini
Mat a picture of the tool remove from spindle. This machine have m19 mecanical done and i cant understand how is working . Can you make a picture of the manual page on spindle please

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