Retrofitting rotomat/screw machine

Hello. I am planning to retrofit rotomat that has 8 analog variable frequency drive spindles 1 servo spindle and 13 servo axes. Does anyone have any idea about where to find a motion controller for that type of operation and also software to control it? I know that Siemens 840D supports many different operations at once but I was looking at something cheaper if possible.

Sorry for such a dry question. A right terminology is a screw machine in English. The example machine is index ms32p but the one that I am retrofitting is a much older machine and hydraulic based. The index 840d has the capability of up to 32 axes/spindles and what is most important in my case is 10 machining channels. So that means that I am essentially doing 10 different pieces even tho I am doing just 1. I don't think that LinuxCNC supports that but if it does that is amazing. I think mach4 industrial has 6 but that is still not enough for my application. Now I have been thinking that I will make this as a 10 separate linuxCNC driven CNC machines. Every controller will control one spindle and one axis. I will synchronize everything with a plc. Cause Index 840d runs around 10k (not sure but I know it cannot be a lot less, maybe even more) and that is a bit too much for my situation. I will expand on my idea and I will see if it is stupid or it would actually work. My problem in solving this solution is, do I assemble a computer and make 10 virtual desktops and run 10 linuxcnc, which could be a shitshow, or do I buy 10 Rasberry pys and go from there. I would like to hear your opinions on the subject.

Hy. Thanks for the good suggestions. I have abandoned both of my previous ideas and have been thinking of doing 8-10 little grbl machines but I can't find any professional way to do that and cause I am doing this for someone I don't want to go there every month cause something failed. So if I could work this trough linuxcnc it would be the best. If i understand correctly i can control the speed of each spindle independently? It is not at the most important but it would be very good cause you have different sized drills and you would obviously need different speeds. If the control of the speed would not be possible the control of the 8 different z-axis movements would be crucial. The best scenario would be if I could do both. So my machine is composed of the first station that is essentially normal lathe with 3 axis and main spindle. Then a small robot arm moves that part to the turning wheel which has clamping jaws and you can then work on the piece with different drills and milling cutters. If the lathe part and the turning wheel part are on 2 separate linuxcnc machines that would not be the problem. I have made some pictures of the machine so you could imagine how it would all work. If you have somewhere documented the things in more detail, that you were talking about then that would be werry helpful. Is it in the linuxcnc document?

That would be hard cause there are no electronics haha. this machine was built before they had any good electronics for this kind of machine. It runs on a principle that you cut out oval rings and that oval rings spin and push the hydraulic fluid which pushes the spindles forward and then spring pushes them back. We are planning to mechanically disassemble the machine and put on the ballscrews and motors for the z-axis instead of the hydraulic movement. The only electronic is for the motors for the spindles, which speed you set with the potentiometer, and I think some simple logic board to control the movement of the robot arm and the turning wheel. Now the procedure is extremely long to set up the part. You have to laser cut each oval ring cause with them you set the movement of the spindles. It was only worth taking few million parts, but with this retrofit, 100,000 would be worth taking. The electronics would be changed out entirely.

Can you elaborate a bit more on that 8 joint actions or at least where to find more information on that? That is the best option I have for now. Thanks a lot for all the help.