Retro fitting Bridgeport Boss 7.5 mill

Do your current drives take a velocity input (+-10vdc)?

Does the current controller use encoder feedback?

If yes, then it is a normal install with the encoder feedback going to the 7i77 and the velocity command from the 7i77 going to the servo drives.

John

Just to add a bit to what Chris said, all your I/O would connect to the Mesa card as well as your MPG. Like Chris said the trick is tracing some wiring down to see what goes to what and identify what you have.

A typical conversion is you connect the I/O, MPG and encoders to the 7i77 then from the 7i77 you connect to the drive velocity inputs. The drive and the servo have some kind of feedback usually a tach generator so the drive "knows" how fast the motor is going compared to the velocity input.

I'm in the process of swapping out my Anilam 1100M controller on my BP knee mill with a Mesa 5i25-7i77 combo.

John

cottonbelt wrote:

I have 2 BTC Bridgeport mills Boss 7.5 with servo 400 drives .

There is a nice detailed write up of a similar conversion here:
code.google.com/p/sector67-sandbox/wiki/ProjectSheetCake

The machine and the Mesa hardware are slightly different, but the basics are much the same.