Exchange Simodrive 610 to new components

Hello guys,

I am running Linuxcnc on my Chiron FZ12S for almost 10 years now. 
The machine is equipped with Siemens hardware ( 1FT5 Motors and Simodrive 610 +/-10V).
What I notice, is that the Simodrive is getting old... It starts with random Joint following errors, then cutting out, Errors ect.

There are days, where you have to switch on and off like 50 times to get the machine homing without error...That's just frustrating. But yeah, the drives are almost 35 years old, so quite okay for that age.

I am thinking quite long about this project, but today pissed me so off, that I really want to move on.

For me, it's no option in buying "refreshed" hardware, because that stuff is expensive and also 30+ years old.... 

So my wish would be, to completely throw the Simodrive away and replace it by new hardware, that doesn't cost as much as the Siemens stuff.

I am running this right now on the 7I77 hardware, but for sure can switch to another board.

Motors XYZ, 4th axis are: Siemens 1FT5064- 1.6 kW @ 4000 RPM
Spindle: Siemens 1FT5076- 7.5 kW @ 7100 RPM

The motors are equipped with Tachos and ROD encoders. 
Are there any drives, that could work with these? I would really like to keep the motors, as they are really good and not worn out.

I am happy over any input!

Thank you guys!

+1 for new  the motors and drivers. In my opinion, it is quite possible that the error is caused by a defective servo motor. Is there a flexible coupling between the servo motor and the ball screw assembly?

Hey,

Yes, you are right- When looking at the system, most parts are still available as "new" or refurbished. I got some prices for complete packages...But that's way too much, looking at the rest, that still is 30+ years old !

Indeed one Encoder of the X axis was broken and caused these random errors. Luckily I bought some spare motors, where I could take one encoder off.

Now I am just having a problem with the 4th axis, it's acting weired- so oscillating when moved. And then the Simodrive shuts off, based on the heavy back and forth movement. I will try to get a new or pretty good replacement board ( 6SC6100-0NA11) it's the board with the "Analog PID" potis.

Just hoping, that this will fix it.

Overall I am just happy with the machine, got a new mini pc, installed debian 13 and the current version and got er running in 2 days after almost 4 years .

Thanks guys!