The Torquecuts were fitted with the BMDC control system. This was a DOS based system that came out in the mid 90s. IT was adequate in its day but is no longer state of the art. The ONLY place that services the BMDC card and software is EMI. IT is NOT cheap to service. Most of the computer stuff can be DIY serviced but the cards that operate the subsystems are NOT sold outright anymore and again, EMI is your sole source of service. If you lose teh PC system that runs DOS you can either dumpster dive for parts or call EMI>
There are some field techs out there who can service and tune the machines - as it is AC OR DC servo based some tuning is/will be necessary for optimum performance. However, as the machine came out during the last years when Bridgeport is/was in business, they may be few and far between. BPT Macines in/near CHicago is one guy who does know the machines and the BMDC system.
I got enticed into the use of the BMDC system due to its DOS base and DIY serviceability. HOwever, since the system is a legacy deal and no longer upgradeable, software wise, it is pretty much WYSIWYG - what you see is what you get.
The machine will do good work. IT is fairly robust. Any hard part service items or upgrades will have to be found on the used or legacy market - PCBs are all pretty much exchange so don't expect someone to come in an plug and play a repair. THis could leave you down for weeks. If the price is right - seen them go for as little as $14K - that may be enticing. Essentially guys swear by and at them. 4th axis are available but that depends if you have AC or DC servo type machine. I looked for nearly a year to find mine.
I bought into the BMDC due to the purchase of an EXTRAK. It does everything I need to do and does so well. With some trick parts added to the ball screws, the thing is deadly accurate. It was, however a POS until BPT Machine tuned it for me. Again, the TC is the same controller but in a bigger, better box of hardware.
I then bought a V2XT. It has pretty much sat due to health issues but it can be tuned up like the EZTRAK as it is essentially the same machine save for more precise Z axis drive. Again it has the bmdc - the devil you know is better than the devil you don't.
After reviewing my situation, however, I wouldn't do it again. Yes to the EZTRAK, but I'd go with HAAS for the tool room mill. Much better controller and way better hardware in their TM1. Same controller is used in their VMC' which is what you're talking about in the TC. If you value service, Haas will service the VMC's, You may be hard pressed to get similar service for the TC.
TC is NOT a bad machine. HOwever there are better ones that won't have you pulling your hair out if/when it goes down.