Hi Jonny
I own a Roland pnc 3100 same machine and i have modela as well as all the other Roland programs and i am very familiar with the machine i have used it for years now.you can use a camm program but it has to have a post for the Roland machine the post is hpgl like a printer would use i wouldn't try and remove the mother board and convert the machine to a direct mach set up i think it would be a waist if the machine is in working order if i can be of any help let me know.
Dennis
Well on the official Roland forums the tech team said I could use it with Rhino by simply hitting print as if I was printing just a standard a4 sheet. I downloaded the driver, and Rhino recognised it, I was able to set the tools and what have you, but when I clicked print, nothing happened. They also said they can provide me with Modella and Dr.Engrave if I provide the serial number, which I can, so I'm going to try that this week.
The little Roland is what i started with learning CNC programing it tout me a lot not that i am any kind of Asspert now LOL. so your 3100 has the mem buffer do you also have the Roland scanner i have the set i have made a lot of parts with this system i always wished it had more power for metal it dose OK but i can run my big machine's so much faster.
Dennis
No scanner sadly! Just the external hard-drive thing which has the power button/LED and spindle control.