Ref: limit switches and inhibits

Looks very nice Dave. How *would* you do this in a real world manufacturing situation? (without adding additional limit switches, etc).

All of the information and advice that has been given is right on target for your application.

I like the idea of dropping the drive out when you hit the overtravels.

Have the limit switches part of the E stop string and use a push button for an overide.

Hold the button down until you jog off the switch and then push the drive reset button and reset the estop string.

Sounds like you are on the right track !

db

I would have three per axis +- OT and the home or reference switch. This are great to use very comapce and have cam rails with adjustable cams.

Particularly considering that the 5 limit switch and no brakes on the servos *was* a "real world manufacturing plant" design, though from a few decades ago.

The series2 Bridgeport knee mill certainly doesn't have enough mass or weight to need servo brakes, or hydraulic counterbalance on the Z axis as is common on the big iron.

I used to work on some big gantry machines back when and they certainly were a lot of fun. Not exactly home shop size though when they weigh

Actually it has a pneumatic support for the knee. It is not absolutely necessary, just a convenience.

I do not know about brakes, but the drives are four quadrant drives.

The video of the spinning machine was nice.

Wes

Thanks Wes

db

Wasn't the best choice of words just wanted to point out different ways of thinking and doing things.

After four decades of doing this I have seen a lot of different ways of doing the same thing. Some better than others.

Hopefully I wont have another decade of this.after awhile they all look the same.

Back under my rock.........

db

What video?

Retrofit I did with hydraulic servos