I finally got round to stripping down the old Harrison knee mill I've had sitting doing nothing for the past couple of years today. And I'm now trying to work out how to power the knee.
I'm going to be putting on a pneumatic cylinder to act as a counter balance, as my rough guestimate is the knee + table weighs around 100kg (about 220lbs for thos not versed in modern weighing systems ). That'll be the easy bit (famous last words!)
My problem at the moment is how to mount the ballscrew. I've got some rough ideas, but can't decide if the servo should be mounted on the knee itself, or on the base.
Just now mounting the servo/belt drive on the base is looking like the better option, but I'd like to see some pictures of other peoples solutions.
I've searched the forum archives, and google but haven't managed to turn up anything. The only place I can remember seeing details of a knee being retroffited was on IJ's infamous thread, but his posts are long gone.
Anybody got any suitable links/pics/general comments?